ATEX/05/1/7. In detail: - PDF Free Download

ATEX/05/1/7 This paper contains available and signed ExNBG clarification sheets and is subdivided in 4 sections. Please be aware that this item will require a large part of the time available for the meeting. In detail: Section 1 contains 25 sheets already noted by the ATEX Standing Committee in the past. These sheets shouldn t need further discussion, if no serious concerns were raised by Member States. Section 2 contains 4 sheets already noted in the past, too, but dealing with issues which should rather be subject to considerations of the Standing Committee. These sheets should be evaluated whether they are suitable to become consideration papers. Whatever results this evaluation will bring, they should be withdrawn by ExNBG, because then published by the SC or considered as not appropriate. Section 3 contains 9 sheets not yet noted, but again dealing with issues which should rather be subject to considerations of the Standing Committee. They should be treated as those in section 2. Section 4 contains 57 sheets to be noted by the Standing Committee. 1

Section 1: 25 sheets already noted by the ATEX Standing Committee in the past. These sheets shouldn t need further discussion, if no serious concerns were raised by Member States. ExNB99-014CS ExNB99-015CS ExNB99-016CS ExNB99-017CS ExNB99-018CS ExNB99-060CS ExNB99-061CS ExNB99-069CS ExNB99-073CS ExNB99-074CS ExNB99-075CS ExNB99-082CS ExNB99-100CS ExNB00-023CS ExNB00-024CS ExNB00-025CS ExNB00-026CS ExNB00-059CS ExNB01-100CS ExNB02-109CS ExNB02-110CS ExNB02-111CS ExNB02-112CS ExNB02-113CS ExNB02-114CS 2

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Issued: European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/02/109/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator WG/98/9 Date: 16/02/01 Step*5.2.3 Initial proposal Proposer: WG/98/9 Date: 16/02/01 Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: Directive, 94/9/EC Article No. 8 Directive, ESR No. 94/9/EC Annex II Directive, Module Annex No. III Standard, No. Authorised by Chairman: M. Shearman Date: 18/06/03 Date of application: Signature: Extension of EC-Type Examination Certificate in the case of (a) different categories or (b) mixes of equipment and protective systems Question: Which conformity assessment procedures have to be performed in the case of different categories within one product or mixes of equipment and protective systems according to Article 1.3 b? Answer: If a product is made of parts which are assigned to different conformity assessment procedures it will be up to the manufacturer to decide how these parts and the whole product shall be placed on the market. The manufacturer can decide to realise the appropriate conformity assessment procedures for each part or for the whole product, even if he decides to place the product as an entity on the market. In the case of separate conformity assessment procedures for each part of the assembled equipment (called assembly in the ATEX guidelines), the manufacturer of that assembly may presume conformity of these pieces of equipment and may restrict his own risk assessment of the assembly to those additional ignition and other relevant hazards, which become relevant because of the final combination. If additional hazards are identified a further conformity assessment of the assembly regarding these additional risks is necessary. This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. EXNB02-109CS Extension of EC-Type Examination Certificate in the case of (a) different categories or (b) mixes of equipment and protective 25 systems.doc

- 2 - If the manufacturer explicitly asks a notified body to assess the entire product, then that conformity assessment procedure has to be applied, which covers the highest requirements. The involved Notified Body shall include into the EC-type examination all aspects of the product. Existing conformity declarations of the manufacturer for parts of the product should be considered. The Notified Body should inform the manufacturer about the possibilities of separate conformity assessment procedures for each part of the assembly as pointed out by the ATEX guidelines in table 1. ANNEX Example: Vapour recovery pump for petrol stations (a) The pump is sucking the petrol vapour-air mixture from the atmosphere and is conveying it in pipe-work attributed to zone 0. Accordingly it is connected at its inlet and outlet to a potentially explosive atmosphere classified as zone 0. The pump itself is placed in a zone 1 environment. With regard to the inlet and outlet connection the pump then has to comply with the requirements for category 1 equipment. The corresponding EC-type examination (equipment) has to be carried out by a Notified Body. With regard to the remaining (outer) body and integrated parts of the pump the Notified Body includes the necessary category 2 assessment into the certification, even if there are only nonelectrical ignition sources to be considered. Both categories shall be indicated in the EC type examination certificate and in the marking. For those category 2 parts of the pump, which show only non-electrical ignition sources and which are placed separately in the market for which the technical documentation has been communicated to a Notified Body the EC declaration of conformity (for equipment) or a written attestation of conformity (for components) of the manufacturer aresufficient. (b) Often the pump is expected to prevent the passage of a deflagration flame from the inlet to the outlet connection as typical vapour recovery pumps contain flame arresters in the inlet and outlet pipe. In this case the pump simultaneously may qualify as a protective system (in-line deflagration arrester). A Notified Body after having carried out a corresponding assessment of the flame arresting capability may then issue a separate EC-type examination certificate for the pump as protective system. In case that both aspects (equipment and protective system) have been assessed by the same Notified Body, only one EC-type examination certificate might be released. EXNB02-109CS Extension of EC-Type Examination Certificate in the case of (a) different categories or (b) mixes of equipment and protective systems.doc 26

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Issued: European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/02/111/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator WG/98/9 Date: 16/02/01 Step*5.2.3 Initial proposal Proposer: WG/98/9 Date: 16/02/01 Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: Directive, 94/9/EC Article No. Directive, ESR No. Directive, Module Annex No. Standard, No. 94/9/EC Annex Authorised by Chairman: M. Shearman Date: 18/06/03 Date of application: Signature: Equipment with connections between areas covered by directive 94/9/EC and areas with high pressure Question: Does conveying equipment where some parts but not all are under atmospheric pressure with internal pressures different from atmospheric pressure fall under the scope of directive 94/9/EC and should the assessment of the equipment take into account the increasing hazards associated with these other pressures? Answer: Yes. Since conveying equipment is covered by the Directive 98/37/EC for machinery, a risk assessment has to be performed including the risk of explosion independent of the question whether the equipment is matter of Directive 94/9/EC. When performing this risk assessment it will become evident that although parts of the described equipment are outside the scope of Directive 94/9/EC during normal operation (pressure oscillates between too low and too high values in relation to "atmospheric conditions") some parts or spaces still are under the scope and that the whole equipment during start and shut down is under the scope, at least. So both of the following examples fall under the scope of Directive 94/9/EC. This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. 29 EXNB02-111CS Equipment with connections between areas covered by directive 94-9-EC and areas with high pressure.doc

- 2 - ANNEX Examples: 1. Vapour recovery pump for petrol stations The pump is sucking the petrol vapour air mixture from the atmosphere and is conveying it into a zone 0 pipe. Accordingly it is connected at its inlet and outlet to a potentially explosive atmosphere. It is itself placed in a zone 1 environment. Accordingly all outer parts of the pump are connected to a hazardous area. It is the aim of all the protections measures of the pump to avoid the ignition of all connected hazardous areas, no matter if the ignition sources are inside or outside the pump. 2. Vacuum pump sucking from a vacuum container and conveying the mixture into a pressure vessel or pressure line In this case the inner parts of the pump are not connected to an atmospheric environment, and accordingly only the outer parts of the pump are covered by both ATEX regulations. (The manufacturer may wish to sell this equipment for atmospheric use of the inlet and outlet side additionally, and then case 1 applies). 30 EXNB02-111CS Equipment with connections between areas covered by directive 94-9-EC and areas with high pressure.doc

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Issued: European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/02/112/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator WG/98/5 Date: 15/05/01 Step*5.2.3 Initial proposal Proposer: WG/98/5 Date: 15/05/01 Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Authorised by Chairman: M. Shearman Date: 18/06/03 Date of application: Signature: EC-type examination of gas detectors incorporating a measuring function for explosion protection Question: When does Annex II, Clause 1.5 of directive 94/9/EC apply if performing EC Type examination of gas detectors that incorporate a measuring function for explosion protection? Answer: If a gas detector incorporates a measuring function for explosion protection in the sense of directive 94/9/EC it shall be assessed as safety-related device according to annex II, clause 1.5 EOTC/01/009 also applies. For example, a portable gas detector that is intended to be used to detect the presence of an explosive atmosphere prior to the opening of a flameproof enclosure that contains energised electrical circuits, is being used as a safety-related device. Annex 8, question 12 of the ATEX-guidelines concludes that: 1. Measuring equipment is within the scope. 2. Measuring equipment has to be safe with respect to explosion protection and the measuring function also requires assessment. 3. This measuring function can be used for the evaluation of potentially explosive atmospheres or for control of ignition sources within the equipment itself. This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. 31 EXNB02-112CS EC-type examination of gas detectors incorporating a measuring function for explosion protection.doc

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Issued: European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/02/113/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator WG/98/5 Date: 15/05/01 Step*5.2.3 Initial proposal Proposer: WG/98/5 Date: 15/05/01 Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Authorised by Chairman: M. Shearman Date: 18/06/03 Date of application: Signature: EC-type examination and supervision of production for gas detectors incorporating a measuring function for explosion protection Question: What special technical documentation and measures are necessary for conformity assessment procedures of gas detectors incorporating a measuring function for explosion protection? Answer: A) EC-type examination The technical documentation (according to annex III, clause 3) that shall be submitted for that part of an EC type examination of a gas detector which deals with the measurement performance (measuring function for explosion protection in the sense of directive 94/9/EC, Annex II, paragraph 1.5.5), shall include a complete set of design and manufacturing drawings, a detailed description of the software operation and identification. B) Supervision of the production It is the manufacturer's obligation to ensure that each equipment to be placed on the market is identical with the type tested. To confirm the regular operation of the measuring function of a gas detector the following checks, if applicable, on all relevant parts of each gas detector are necessary 1. input and output functions, e.g. operation of displays, LEDs, alarms and push buttons, 2. sensitivity, 3. software version. In addition, the manufacturer shall perform the following tests on a sample basis by either performing the tests in accordance with harmonized standards or by other technically equivalent procedures: 4. response time, 5. calibration curve, 6. response to other gases, if applicable, 7. long-term stability, 8. any other check that is considered necessary to confirm the measuring function is in compliance with the applicable standards (for example, effects of temperature or humidity). This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. 32 EXNB02-113CS EC-type examination and supervision of production for gas detectors incorporat-ing a measuring function for explosion protection.doc

- 2 - Any deviation in the expected results of the checks that are due to design changes, shall be notified to the body that performed the EC type examination. All the above aspects shall be considered by the notified body that performs the audits of the manufacturing facility. 33 EXNB02-113CS EC-type examination and supervision of production for gas detectors incorporat-ing a measuring function for explosion protection.doc

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Issued: European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/02/114/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator M Shearman, Sira Date: 14/06/02 Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Authorised by Chairman: M. Shearman Date: 18/06/03 Date of application: Signature: Distribution, availability and definition of the "Relevant information" to be "communicated" to other notified bodies following issue or withdrawal of EC-type Examination Certificates, Production QA Notification Certificates and Product QA Notification Certificates Background information The Standing Committee has requested that notified bodies (NB's) comply with the requirements of the annexes mentioned above. Some NB's circulate lists of certificates issued on a regular basis, other NB's publish the list on a web-site, others sell copies and some wait until a request is made. The Standing Committee would like NB's to agree a common practice to be adopted by all NB's. In addition, although not a requirement of the directive, the Standing Committee has asked if the "relevant information" could be made available to other interested parties. This leads to the following questions and answers: Q1 What is included in the "relevant information" as quoted in Annex III Clause 7, Annex IV, Clause 6 and Annex VII Clause 6? A1 Q2 "Relevant information" is the minimum information that enables the validity or status of the certificate and its amendments to be established. How will notified bodies communicate this "relevant information" to other notified bodies? This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. 34 EXNB02-114CS Distribution availability and definition of the Relevant information to be communicated to other notified bodies.doc

- 2 - A2 Q3 A3 Notified Bodies should provide to each other details of their contact point from which the 'relevant information' can be obtained when required. If a Notified Body requires a copy of a certificate from another Notified Body then that Body may make a reasonable charge for providing the certificate. Can the "relevant information" be made available to any other interested parties? Yes 35 EXNB02-114CS Distribution availability and definition of the Relevant information to be communicated to other notified bodies.doc

Section 2: 4 sheets already noted in the past, but dealing with issues which should rather be subject to considerations of the Standing Committee. These sheets should be evaluated whether they are suitable to become consideration papers. Whatever results this evaluation will bring, they should be withdrawn by ExNBG, because then published by the SC or considered as not appropriate. ExNB99-057CS ExNB99-081CS ExNB02-116CS ExNB02-121CS 36

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Issued: European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/02/116/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator WG/98/5 Date: 13/11/01 Step*5.2.3 Initial proposal Proposer: WG/98/5 Date: 19/11/01 Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Authorised by Chairman: M. Shearman Date: 18/06/03 Date of application: Signature: Safety devices, controlling devices and regulating devices (Article 1 (2)) Question: How should the application of the Directive to safety and controlling devices providing a safety function for equipment intended for use in potentially explosive atmospheres be understood? Answer: Safety and controlling devices are covered by the relevant requirements of the Directive if they contribute either directly or indirectly to the safe functioning of equipment intended for use in potentially explosive atmospheres. It should be understood that the meaning of the Directive is such that safety devices are covered under the Directive, even if (and not only if) they are intended for use outside a potentially explosive atmosphere and provide a direct (or indirect) contribution to the safe functioning of equipment intended for use in potentially explosive atmospheres. It was also evident that the controlling of ignition sources for such devices (in respect of the ATEX Directive) outside of a potentially explosive atmosphere was not required, and was meaningless if the device was inside such a potential atmosphere but did not contain an ignition source. However, this did not preclude the need to consider other relevant aspects. The reasoning is given in annexes I and II. This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. 43 EXNB02-116CS Safety devices, controlling devices and regulating devices.doc

- 2 - Annex I Comment on definition of "equipment" (Article 1.1 and 1.3a) and "Safety devices, controlling devices and regulating devices" (Article 1 (2)) by Deutsche Montan Technologie, 19 November 2001 1 Basis Article 1 (2) defines, that "Safety devices, controlling devices and regulating devices intended for use outside potentially explosive atmospheres but required for or contributing to the safe functioning of equipment and protective systems with respect to the risks of explosion are also covered by the scope of this Directive". In Article 1 (1) and 1 (3)a "equipment" is defined: "Equipment means machines, apparatus, fixed or mobile devices, control components and instrumentation thereof and detection or prevention systems intended for use in potentially explosive atmospheres, which are capable of causing an explosion through their own potential sources of ignition" From Article 1 (3)c follows, that equipment (for differentiation to components) has an "autonomous function". In Article 3 is defined, that "Equipment, protective systems, and the devices referred to in Article 1 (2) to which this Directive applies must meet the essential health and safety requirements set out in Annex II which apply to them, account being taken of their intended use". Annex II, Preliminary observations, B) says: " For the devices referred to in Article 1 (2), the essential requirements shall apply only in so far as they are necessary for the safe and reliable functioning and operation of those devices with respect to the risks of explosion." Problem 2.1 In Annex II, clause 1.5 of the Directive " Requirements in respect of safety-related devices" are defined. Obviously this phrase has lead to the wrong opinion (together with the phrase in Article 1 (2)), that these requirements are valid for the devices referred to in Article 1 (2), only, and not for equipment. That, in contrary, according to definitions of the Directive, equipment can perform the function of safety devices, controlling devices and regulating devices is shown in the following: 1) In Article 1 (3)a "detection or prevention systems" are listed as equipment (no protective systems!). 2) Article 3 explicitly states, that equipment "must meet the essential health and safety requirements set out in Annex II which apply to them, account being taken of their intended use". There are no restrictions, that clause 1.5 of Annex II may not be applied for equipment. 3) In the preliminary remarks of Annex II in B) the requirements on devices referred to in Article 1 (2) are restricted to those, which " are necessary with respect to the risks of explosion". Here no definition is given, which these requirements are and, in particular, no restrictive statement concerning requirements on equipment is made. Obviously it is indisputable that protective systems have to contain safety function(s). 2.2 Obviously the meaning of Article 1 (2) has to be clarified. In the "Guidelines" is said that there are two main issues in Article 1 (2): i) that safety devices, controlling devices and regulating devices, if they contribute to or are required for the safe functioning of equipment or protective systems with respect to the risks of explosion are subject to the directive; 44 EXNB02-116CS Safety devices, controlling devices and regulating devices.doc

- 3 - ii) that devices are covered even if they are situated outside the potentially explosive atmosphere. Although the intention of the Directive is correctly interpreted with these issues, the context of the first issue can't be taken from Article 1 clause 2. Article 1 clause 2 could be understood in the way, that only those safety devices are under the scope of the Directive which are for use outside potentially explosive atmospheres. This article should better be formulated (and understood, above all) as follows: "Safety devices, controlling devices and regulating devices required for or contributing to the safe functioning of equipment and protective systems with respect to the risks of explosion also are covered by the scope of this Directive even if they are intended for use outside potentially explosive atmospheres." Moreover it is stated in the guidelines: "If the device does not have its own potential source of ignition then the device will not be regarded as equipment but of course the requirements resulting from Article 1 (2) will still apply." Here the question arises how to mark such a device. Annex II Comments by WG/98/5 on document "The application of ATEX Directive 94/9/EC to devices that contribute to the safe functioning of equipment intended for use in a potentially explosive atmosphere, including devices with a measuring function", written by Ken Thomas, 26th April 2001 13. November 2001 The following arguments deal with general aspects of document EOTC/01/036, only. Document EOTC/01/036 appears to conclude that Directive 94/9/EC contains requirements for safe functioning of devices only if equipment relies on the device to "control" its own ignition sources. (In document EOTC/01/036 defined as "direct" contribution to safe functioning of equipment). This opinion is incomplete because the formulation of article 1.2 is not restricted to safety devices with a function denoted in the paper as "direct" contribution. The text covers also safety devices, controlling devices and regulating devices indirectly contributing to the safe functioning of equipment. This is supported by the following two clauses of EN 1127-1:1997: limitation of concentration by monitoring with gas detectors or flow detectors, which shall be coupled to alarms, other protective systems or automatic emergency functions (EN 1127-1: 1997, 6.2.2.2). use of measuring and control systems to limit the occurrence of effective ignition sources (Annex C of EN 1127-1). 45 EXNB02-116CS Safety devices, controlling devices and regulating devices.doc

Section 3: 9 sheets not yet noted, but dealing with issues which should rather be subject to considerations of the Standing Committee. They should be treated as those in section 2. ExNB99-084CS ExNB99-086CS ExNB00-020CS ExNB00-032CS ExNB00-036CS ExNB00-038CS ExNB01-102CS ExNB01-104CS ExNB04-161CS 47

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/032/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 35.02 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: Directive, 94/9/EC Article No. Directive, ESR No. Directive, Module Annex No. Standard, No. Authorised by Chairman: M. Shearman Date of application: Date: Signature: Status: Status: Status: Status: Status: Can a certified component bear the distinctive community mark defined in Annex II to directive 79/196/EEC of 06 February 1979 No, an additional clause shall be included in the component certificate as follows: This component is not authorised to bear the distinctive community mark defined in Annex II to directive 79/196/EEC of 06 February 1979 Minor changes of this sentence may be allowed on condition that the meaning is not modified. 1 May be superseded by CS of ExNB This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. U:\Common\09 ATEX\06 Notified Bodies\clarification sheets\valid_clarification_sheets\exnb00-032cs.doc 53

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/036/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 38.02 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: Directive, 94/9/EC Article No. Directive, ESR No. Directive, Module Annex No. Standard, No. Authorised by Chairman: M. Shearman Date of application: Date: Signature: Subject: EN 50014:1977 Clause 3 and EN 50014:1992 Clause 5, X-Marking Installation Temperature Question: Where the temperature of electrical apparatus depends upon the installation, shall the certificate be marked with the X-mark, with the special conditions for safe use? Answer: Yes. For example a T6 temperature transmitter in contact with a fluid: - If the measured fluid temperature is above 40 C, the transmitter, in the limits specified by the manufacturer, shall not be used in Ex-atmospheres with an ignition temperature of 85 C, increased with the difference of fluid temperature and 40 C 1 May be superseded by CS of ExNB This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. U:\Common\09 ATEX\06 Notified Bodies\clarification sheets\valid_clarification_sheets\exnb00-036cs.doc 54

Section 4: 57 sheets to be noted by the Standing Committee. ExNB98-001CS ExNB98-002CS ExNB98-004CS ExNB98-005CS(extra file) ExNB98-006CS ExNB98-007CS ExNB98-009CS ExNB98-010CS ExNB98-063CS ExNB98-064CS ExNB98-066rev1CS ExNB98-068CS ExNB99-071CS ExNB99-072CS ExNB00-028CS ExNB00-029CS ExNB00-031CS ExNB00-033CS ExNB00-034CS ExNB00-035CS ExNB00-037CS ExNB00-039CS ExNB00-040CS ExNB00-041CS ExNB00-042CS ExNB00-045CS ExNB00-046CS ExNB00-047CS ExNB00-048CS ExNB00-049CS ExNB00-051CS ExNB00-052CS ExNB00-053CS ExNB00-054CS ExNB00-055CS ExNB00-056CS ExNB00-093CS ExNB00-095CS ExNB00-124CS ExNB00-125CS ExNB00-126CS ExNB00-127CS ExNB00-128CS ExNB00-129CS ExNB00-130CS ExNB01-101CS ExNB01-103CS ExNB01-105CS ExNB01-106CS ExNB01-107CS (extra file) ExNB03-131CS ExNB03-132CS ExNB03-133CS ExNB03-134CS ExNB04-160CS ExNB04-170CS ExNB05-190CS 60

ExNB Co-ordination of Notified Bodies Electrical Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Issued: European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/98/066/CS rev.1 Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL(96)SP/006 Date: 1996-11- 07 Step*5.2.3 Initial proposal Proposer: 2nd ExNB Meeting Date: 1998-06- 17 Step*5.2.4 Responses/Final Draft 5 th ExNB meeting Date: 14/06/20 01 *Step refers to ExNB Rules 1 st amendment Date: 09/09/02 Subject: Directive, 94/9/EC Article No. Directive, ESR No. Directive, Module Annex No. Standard, No. EN 50020:1994 sub-clause 6.4.7 and 6.4.8 - Verification of CTI for 'i' Authorised by Chairman: M. Shearman Date: 09/09/02 Date of application: Signature: Subject: Question 1: Answer: Question 2: EN 50020:1994 sub-clause 6.4.7 and 6.4.8 - Verification of CTI for 'i' How shall CTI for PCBs, with creepage distances on which intrinsic safety depends, be verified? By making own CTI measurements or measurements by a sub-contracted laboratory or accept CTI values provided by the apparatus manufacturer backed up with evidence of quality assured measurement (e.g. accredited test report) according to the correct test procedure (IEC 60112:1979). CTI values together with a reference to the correct test procedure (IEC 60112:1979) specified in the documentation by the apparatus manufacturer or manufacturer of the PCB, can also be accepted if backed up by experience of the laboratory. For which cases shall CTI be verified for coated PCBs? Answer: CTI shall be verified for both coated and uncoated PCB, irrespective of if conductive parts protrude through the coating or not. This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. 77 ExNB98-066rev1CS EN 50020-1994 sub-clause 6.4.7 and 6.4.8 - Verification of CTI for 'i'.doc

- 2 - However, for PCBs with coating according to sub-clause 6.4.8 and with no conductors emerging from the coating (including no conductive parts with sharp edges), CTI need not to be verified for neither coated nor uncoated samples of the PCB. 78 ExNB98-066rev1CS EN 50020-1994 sub-clause 6.4.7 and 6.4.8 - Verification of CTI for 'i'.doc

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/28/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 31.05 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: Procedural, Language of the Certification Label Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: Note: What language should the certification label be written in? The certification label should be written in the language of the country where that product is put on the market. The responsibility for the translation rests with the manufacturer, the importer or his manufacturer. The validity of the certificate cannot be put in doubt by the contents of the label or its translation. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-28CS.DOC 86

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/031/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 35.01 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50018:1977 Clause 4.1.3 and EN 50018:1994 Clause 5.2.3, Rectangular Spigot Joints Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: Are spigot joints with a rectangular shape/section, (with or without rounded corners), consisting of a flat part and a spigot part permitted without restrictions? Yes. These are permitted without restriction provided that the minimum values of width of joint and of maximum gap indicated in tables 3 and 4 of EN 50018:1977 or in tables 1 and 2 of EN 50018:1994 are observed. However, when there is no flat part of the spigot joint acetylene is excluded from Group IIC. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-31CS.DOC 88

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/035/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL Date: Step*5.2.3 Initial proposal Proposer: HOTL Date: Step*5.2.4 Responses/Final Draft HOTL 38.01 1 Date: *Step refers to ExNB Rules Subject: Certificate of Conformity of a Flameproof Enclosure Containing Different Components Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: What requirements need to be applied to certificates of conformity for Ex d enclosures, which can have different components built into them? The criteria for certificates of Conformity for d enclosures with different components to be built in, is as follows: a) A certificate should be issued for each specific apparatus (for example a measuring instrument, junction box or control unit); b) The electrical characteristics of the apparatus should be specified; c) The documents mentioned on the certificate should include a list of components mounted in the enclosure and a schematic representation of their layout; d) Installation of intrinsically safe circuits in enclosures should be restricted to special cases indicated in documents. This should also apply to capacitors and hot surfaces 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-35CS.DOC 91

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/039/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 40.01 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50018:1977 Clause 14 and EN 50018:1994 Clause 15, Heating Cables Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: Are bending tests required for heating cables complying with the Flameproof design according to the standard EN 50018 and of which the enclosure consists of a flexible sheath and is earth fault protection required? Yes, they shall be submitted to the bending tests foreseen by amendment 4 of the standard EN 50019. Also an earth fault shall be foreseen and so an electrical protection device in relation to an earth fault is required. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-39CS.DOC 93

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/041/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 44.02 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50019:1977 Clause 4.6.1.5 and EN 50019:1994 Clauses 5.6.1.5 & 5.6.2.1 Materials used inside Battery Containers Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: For materials used in the construction of a battery, what procedure should be used to determine that the requirements of clause 4.6.1.5 of EN 50019 are fulfilled? 1) The manufacturer sends to the testing station a declaration, dated and signed to attest that the requirements of clause 4.6.1.5 of EN 50019 are fulfilled. 2) In case of doubt the testing station may carry out the control. Note Clarification still necessary according to ExNB WG 97/4 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-41CS.DOC 95

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/042/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 44.04 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50018:1977 Clause 6 and EN 50018:1994 Clause 7, Wear -Push Rods and Spindles in Flameproof Enclosures Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: What criteria is to be used, to determine if the wear experienced by a push rod or spindle will be sufficient to affect the Flameproof properties of a joint and consequently whether or not bearings are required? This is a matter of engineering judgement but where doubt exists, life testing of the assembly followed by transmission testing under the most adverse conditions will be undertaken. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-42CS.DOC 96

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/045/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 46.18 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50018:1977 Clause 12.1 and EN 50018:1994 Annex C, Cable Entry Seal Under Tension Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: Can a cable entry be certified in which the seal operates under tension rather than under compression? Yes, the cable entry can be dealt with as a part of a plastic enclosure and can be certified if the component withstands all tests specified for plastic enclosures. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-45CS.DOC 97

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/046/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 46.19 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50018:1977 Clause 3 and EN 50018:1994 Clause 4 T Class for EEx d Motors Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: With respect to the determination of temperature class of flameproof motors, is the use of thermal switches generally accepted to limit the temperature within the required values and is this always sufficient? The use of thermal switches is generally accepted to limit the temperature within the required values. The thermal detectors in windings are not always sufficient to ensure the temperature limitation; in particular, in the case of inverter fed motors, temperature rises in bushings and bearings must be taken into account. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-46CS.DOC 98

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/051/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 47.09.01 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50019:1977 Ventilation and IPX3 Testing of Batteries Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Are peak values of hydrogen concentration permitted, when testing the ventilation of batteries complying with EN 50019, Amendment 2. Also is an IPX3 test obligatory? Answer: Peak values of hydrogen concentration are permitted as long as the high concentration occurs for less than 30 minutes. A practical test of IPX3 is not obligatory; experience with similar constructions may be used. If a practical test is carried out and water enters the enclosure, the insulation resistance test as described in 5.5.1 of EN 50019/A2 must be passed successfully, to show that the quantity of water is not harmful. Note Clarification still necessary according to ExNB WG 97/4 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-51CS.DOC 102

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/052/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 47.09.02 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50019:1977, Dielectric Strength Tests for Junction Boxes. Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: For EExe junction boxes equipped by the manufacturer with approved components, should the routine dielectric strength test be carried out with the components wired and if so how should the test be carried out? Yes, the test shall be carried out according to the following standards: - industrial control equipment: EN 60947 - measurement control and laboratory use: EN 61010 Note Clarification still necessary according to ExNB WG 97/4 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-52CS.DOC 103

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/053/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 48.01 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50014:1977 Clause 6.3 and EN 50014:1992 Clause 7.3.2, Electrostatic Hazard. Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: Note: Is it permissible to mark with a warning label, (visible to the user), fixed enclosures or parts of enclosures of plastic material of any size, if the usage does not imply the hazard of electrostatic charge? Yes, but it is not appropriate to use a warning if: - There is a rapid airflow (e.g. air flow meters, fans air guides, equipment intended to be installed in a mine gallery subject to forced ventilation, etc.) - The surface is intended to be touched frequently in service (e.g. keyboards, switches, windows likely to be cleaned frequently, touch screens on Visual Display Units). The use of an electrostatically harmless (e.g. leather) additional case is acceptable with X-marking for hand held apparatus 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-53CS.DOC 104

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/054/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 48.02 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50014:1977 clause 16 & EN 50014:1992 clause 17 - Fans Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: Do the requirements according to clause 16 of EN 50014:1977 (clause 17 of EN 50014:1992) apply for Group II fans for air-conditioning ('e' or 'd' motors with fan blades, hood etc) for a Certificate of Conformity? Yes they do. For fans intended to be mounted in ventilation duct systems the requirements for IP-protection and associated requirements for the parts providing the IP-protection (e.g impact test, light alloy enclosures) can also be fulfilled at the inlet and outlet of the duct. This shall be stated by X-marking and corresponding conditions in the certificate. Note: Based on the HOTL-decision according to item 4 (Decision 6.1) in the Minutes of the 50 th meeting of HOTL (16-18 October 1996). 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-54CS.DOC 105

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/055/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 48.03 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: Cables ends or cables between parts of apparatus for types of protection other than intrinsic safety Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: For apparatus with type of protection other than intrinsic safety with cable ends or cables between parts of such apparatus, what shall be verified? Answer: The following shall be verified: - - requirements or tests in the standard regarding dielectric strength - cables entering enclosures through compression glands shall have correct size for the gland. - cables entering d enclosures shall be effectively filled. - Where appropriate the following may be covered by special conditions for safe use and installation (X-marking) 1. The cable shall be installed in a way which provides for mechanical protection 2. The cables shall be suitable for the environmental use Note: Requirements, which shall not be applied or considered include: Cable length Conductor Area (except when relevant to temperature classification) Fire Propagation Properties 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-55CS.DOC 106

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/056/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 48.08 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50018:1977 Clause 3 and EN 50018:1994 Clause 14, Frequency Converters and EEx d Motors Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: What shall be verified if an EEx d motor is energised through a frequency converter? Answer: The following shall be verified: - temperature rise of the motor in combination with the converter. - thermal protection is provided in or on the motor windings. Note: thermal protection in or on the motor winding is not necessary if the converter is specified and included in the certificate. - In all cases the protection efficiency means shall be tested. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-56CS.DOC 107

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ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/124/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 48.10 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50019:1977. Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: For apparatus with a winding, type of protection e (e.g. solenoid, inductive sensor) that has a rated voltage and will be supplied by an unspecified external power supply, what shall be considered? Answer: 1) The rated voltage ±10% applies for the assessment of temperature and rated voltage applies for the assessment of clearance and creepage distances 2) External fault conditions (e.g. higher supply voltages than rated voltage) shall not be considered Note Clarification still necessary according to ExNB WG 97/4 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-124CS.DOC 112

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/125/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 48.11 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50020:1977 and EN 50020:1994 - T-class for small coils Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: How shall temperature classification of small coils be performed? Temperature rise measurements of small coils (e.g. coils for headphones and microphones) is made by the resistance method considering fault conditions and dissipation of maximum power (P i or corresponding power), simulated as follows: - Modify coil (reduce number of turns) to allow maximum power dissipation at matching coil resistance for the section deemed to get the highest temperature rise. - For unmodified coils increase applied power proportional with coil resistance to power source resistance ratio or apply the maximum current (l i or corresponding current) throught the coil. - For very small and compact coils (high thermal conductivity between turns compared with conductivity to ambient) apply matched power to unmodified coil. 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-125CS.DOC 113

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/126/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 48.13 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50028:1987 Clause 6.2.1, Rated Voltage and External fault conditions. Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: For apparatus in type of protection m that has a rated voltage, which will be supplied by an unspecified external power supply, what shall be considered? 1) The rated voltage +/- 10 % applies to verify that the type of protection is not affected during the fault conditions according to 4.4 of EN 50028. 2) External fault conditions (e.g. higher supply voltages) shall not be considered 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-126CS.DOC 114

ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/127/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 50.01 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50014:1977 Clause 22.4.3 and EN 50014:1992 Clause 23.4.3, Guards for Light Transmitting Parts. Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: Note When considering the removal of guards prior to impact testing Light Transmitting Parts, what is considered as a guard? All obstacles, which prevent the light transmitting part from being hit by the impact head, shall be considered as a guard, which shall be removed for the impact test. However, if the construction and conditions for use are such that there is obviously no risk of damage and the guard is integral with the enclosure or cannot be removed without losing the practical function of the equipment, such a guard need not be removed. All light transmitting parts shall be understood as light transmitting parts, the direction that the light travels being irrelevant, as is the presence, or not, of any internal or external, light source (artificial or natural). 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-127CS.DOC 115

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ExNB Co-ordination of Notified Bodies Equipment for use in potentially explosive atmospheres on Council Directive 94/9/EC (ATEX) Page 1 of 1 European ATEX Notified Bodies Group Clarification/Decision Sheet N ExNB/00/130/CS Editon 1.0 Original in English Status: Step*5.2.1 Question Originator HOTL 50.08 1 Date: Step*5.2.3 Initial proposal Proposer: Date: Step*5.2.4 Responses/Final Draft Date: *Step refers to ExNB Rules Subject: EN 50028:1987 Clause 8.1.4 Permitted Prospective Short Circuit Current Authorised by Chairman: M. Shearman Date of application: Date: Signature: Question: Answer: When considering the requirements of clause 8.1.4 of EN 50028 in the case where a piece of equipment is supplied from a dedicated power supply, not itself subject to certification, what should the terms of certification be based upon? The terms of certification should be based upon the parameters of the dedicated power supply 1 Current wording relates to 76/117/EEC, may be superseded This ExNB Interpretation/Clarification Sheet has the sole purpose of clarifying the application of the EN Standards and/or of the requirements of Directive 94/9/EC and related documents. It does not in any way change the content of the standards and/or of the requirements. It remains valid until an official answer is received from the European Commission of the relevant standardization bodies. G:\ARCHIV\EG-Sekretariate\Explosionsschutz\Allgemeines\Entzippt\ExNB00-130CS.DOC 120

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