A guide to consumer unit and wiring accessory solutions to meet the demands of general housing installations.

Transcription

1 MEM Memera Consumer Units and Wiring Accessories Specification for general housing installations A guide to consumer unit and wiring accessory solutions to meet the demands of general housing installations.

2 This document is available for download as an editable Microsoft Word file or PDF file from:

3 Electrical specifications for household installations Contents 1 Preliminaries and General Conditions 4 2 Electrical Installations Workmanship and Materials 8 3 Description of Systems 11

4 1 Preliminaries and General Conditions 1.01 Scope of Contract Definitions Main Contract Preliminaries & General Conditions Precedence Plans and Drawings Quality of Workmanship & Materials Ordering Storing Materials Damage to Plant & Buildings Access for Plant Scaffolding & Equipment Builders work Cover Up & Protect Attendance by Employer Site & Works Site Representative Site Meetings Regulations Inspection and Testing Handover Procedure Damage Practical Completion Obligations after Practical Completion Instruction of Employers Staff Defects Liability Record Drawings and Manuals PRELIMINARIES AND GENERAL CONDITIONS PS U May 2009

5 Preliminaries and General Conditions Scope of Contract The work covered by this Specification comprises the supply, delivery to site, erection, testing, setting to work, cleaning, making ready for continuous use all materials necessary to form a complete Electrical Installation within the proposed development. The Electrical Contractor shall be responsible for carrying out all the works, as detailed in the Consultants Specification and drawings. It will be the Electrical Contractor s responsibility to liase with the Main Contractor regarding detailed programming at the time of appointment Definitions In construing these General Conditions and Specification, the following words shall have the meaning herein assigned to them: The Employer shall mean :- The individual or organisation for whom the works are to be carried out. The Quantity Surveyor shall mean :- The company responsible for financial matters acting for the Client. The Architect shall mean :- The company responsible for the general and detail design of the building and where appropriate act as lead consultant for the project. The Structural Engineer shall mean :- The company responsible for the design of the above and below ground main structural/drainage services. The Electrical Consultant shall mean:- The company responsible for the design of the Electrical Engineering Services and/or the overall responsibility for checking compliance of the installation with the relevant criteria and standards. The Planning Supervisor shall mean :- The company responsible for provision of a Pre-tender Health and Safety Plan and for the compiling of the Health and Safety file together with health and safety matters. The Main Contractor shall mean :- The company carrying out the main building works and by whom the Contractor may be directly employed, for the purpose of the Contract. The Electrical Contractor shall mean :- The company tendering for/carrying out the electrical installation works Main Contract Preliminaries & General Conditions It is the responsibility of the Electrical Contractor to obtain details of the main contract preliminaries and general conditions at the time of tendering from the Main Contractor and/or the Electrical Consultant/Architect. No additions to the tender sum will be considered for lack of knowledge or inclusion of items necessary by the Contractor for items required by the main contract preliminaries and general conditions Precedence Should any clauses in this Specification conflict with the Main Contract particulars the latter shall take precedence Plans and Drawings The specification is to be read in conjunction with the Schedule of Drawings showing the engineering installation. Notwithstanding the provision of these drawings, the Electrical Contractor will be held responsible for the works embodied therein and shall take his own particulars and provide at his own expense working detailed drawings. Prior to the preparation of the co-ordinated working drawings, the Electrical Contractor shall liase with the other Sub-contractors to ensure that due consideration of other services is taken into account Quality of Workmanship and Materials The whole of the materials used in the installation, are to be new and the best of their respective kinds, and suitable for their intended use. These shall be obtained from the manufacturers specified and the work shall be carried out in the best workmanlike manner and in accordance with the current rules and regulations of the Professional Engineering Institute as appropriate, the Fire Officer, the requirements of the Supply Authority and to the satisfaction of the Consultant. Where applicable, materials should be in accordance with the appropriate British Standards Ordering The Electrical Contractor shall place all orders for materials and equipment immediately upon completing the sub-contract documents. The tender shall include: packing, carriage, delivery, unloading, storage, placing in position, protection from weather and watching of all materials. It shall also include all labour of every kind whatsoever, whether skilled or unskilled, required in the provision and fixing of the work Storing Materials The Electrical Contractor shall supply, erect, maintain and clear away on completion, suitable workshops, storerooms, offices and sheds as necessary for the sub-contract works. All materials are to be stored in a manner to avoid damage and/or deterioration thereto Damage to Plant and Buildings The Electrical Contractor is to be held entirely responsible for all damage done to the Works whether such damage be wilful or due to carelessness on the part of the person or persons or to any other cause whatsoever except damage due to any cause over which neither the Main Contractor nor the Electrical Contractor have any control. The Electrical Contractor shall make good at his own expense any damage which may be caused by him or his workmen to the premises or property of the Main Contractor or any person or persons during the carrying out of this subcontract and during the period of maintenance specified. PRELIMINARIES AND GENERAL CONDITIONS PS U May

6 1 Preliminaries and General Conditions 1.10 Access for Plant Before any work is put in hand on any equipment, the Electrical Contractor is to check on site the dimensions of all doorways, access doors etc., so that equipment can be admitted to its allotted position Scaffolding and Equipment The Electrical Contractor is to provide all plant including scaffolding, equipment, planking, ladders etc., necessary for the full and proper completion of the work Builders work The Electrical Contractor shall be responsible for preparing all builders work details, drawings relating to his installation in adequate time to avoid delay in the building programme. All builders work to be carried out for the Electrical Contractor by the Main Contractor Cover Up and Protect Every care shall be taken of the various works during the contract and shall be provided with suitable protection as necessary. The Electrical Contractor shall make good or pay for making good of all work that may suffer from want of casing or protection Attendance by Main Contractor The following services and facilities shall generally be provided by the Main Contractor free of charge to the Electrical Contractor :- (a) Use of all welfare facilities. (b) All temporary general lighting and electricity supply necessary for the execution of the sub-contract works. (c) All water necessary for the execution of the sub-contract works. (d) Cutting away and making good. Scaffolding erected for use in the Main Contractors work will be available for use by the Electrical Contractor. Clearing away rubbish and the removal from site of surplus materials shall be the responsibility of the Electrical Contractor. If agreed with the Main Contractor rubbish and waste materials may be deposited in the Electrical Contractor s skip for him to dispose of Site and Works The Electrical Contractor shall be held to admit that he has satisfied himself as to the exigencies of the site that he is recommended to visit and has inspected the drawings and the specification sufficiently to advise himself of their full intent and purpose. No claim whatsoever arising by reason for the Contractors failure to observe these precautions, will be entertained Site Representative The Electrical Contractor shall keep a competent site engineer in charge of the work, who shall be in constant attendance during progress of the works undertaken by themselves Site Meetings The Electrical Contractor shall attend site meetings as required by the Consultant and Main Contractor and due allowance should be made in the tender for attendance at such meetings Regulations The Electrical Contractor is to comply with any and all Regulations and Codes of Good Practice, with Supply Authorities and must submit any equipment items for inspection or test if required to do so, without additional charge to the sub-contract. The Contractor will be responsible for all aspects of the Health & Safety At Work Act, CDSM, and is to comply with the Control of Substances Hazardous to Health Regulations (COSHH), in so far as they apply to the materials and methods used in the sub-contract work carried out by him and in relation to other sub-contractors on site Inspection and Testing The sub-contract provides for the inspection and testing on site and the Electrical Contractor shall provide all the necessary duly certified and calibrated instruments, labour and accessories required for the purpose of carrying out the tests. This may be witnessed by the Consultant at a time agreed by both parties. The Electrical Contractor shall provide all relevant test certificates including the relevant NICEIC Electrical Installation Certificate, for all tests carried out Handover Procedure Following the inspection of the installation and certification by the Consultant and agreement of a Defects List, the installation will be accepted as being handed over for use by the Employer Damage The Electrical Contractor shall be responsible for all damage caused to the fabric of the building as a result of his installation or actions. The Contractor shall ensure that all services and equipment installed by him are safe from being damaged or causing damage Practical Completion Before the sub-contract works are included in a certificate of Practical Completion, the sub-contract works, or such part as is referred to in the Certificate, shall be completed. The completion shall include setting to work, testing and commissioning, including proving the performance is in accordance with the Specification Obligations after Practical Completion Between the issue of a Certificate of Practical Completion and the Certificate of making Good Defects relating to the whole or part of the sub-contract works the Electrical Contractor shall provide at his own cost the following:- a) A prompt call-back service, available at all reasonable times, to attend to any faults. b) Carry out a final test at the end of the Defects Liability Period to demonstrate to the Consultant that the sub-contract works are operating efficiently and that all components are functioning correctly. 6 PRELIMINARIES AND GENERAL CONDITIONS PS U May 2009

7 Preliminaries and General Conditions Instructions of Employers Staff or others The Electrical Contractor shall include in his tender for skilled staff to instruct the Employer or others, in the operation, maintenance and servicing of the installations Defects Liability The Electrical Contractor shall be liable for making good any defects on the installation, for a period of twelve months from the date of issue of the Certificate of Practical Completion for the installation Record Drawings & Manuals During the progress of the works, the Electrical Contractor shall record on drawings in an approved manner, the information necessary for the preparation of final record drawings of the completed installation. The draft as fitted marked up drawings shall be made available to the Consultant for checking and inspection 4 weeks before final handover. On completion of the works and within one month of issue of the Certificate of Practical Completion, the Electrical Contractor shall supply to the Planning Supervisor completed record drawings generally as follows:- (a) Two sets of negatives of the plastic velograph type. (b) Three sets of black and white prints taken from above negatives. (c) Diskette with the drawings in AutoCad LT Release 2 or agreed current equivalent. The Electrical Contractor shall also provide complete operational manuals incorporating complete details of all works and equipment he has provided and installed. These documents shall be presented in a A4 loose leaf binder with the project title and manual title indelibly printed on the front face and spine of the binder. In addition of the As-Fitted drawings and Operating and Maintenance manuals the Electrical Contractor shall produce a simplified non-technical User Guide as a separate document. The User Guide shall be described and identify both in text and drawings, no larger that A3 size, the following :- 1. Location of each appropriate incoming service i.e. Gas, Water, Electricity etc. 2. How to turn each service On and Off. 3. Describe in non-technical terms the systems installed. 4. Daily routines for turning systems On and Off if appropriate. 5. Emergency measures to be taken in the event of loss of supply, i.e. who to notify, telephone numbers etc. 6. Daily procedures to follow for installed safety systems. 7. Emergency procedures to follow for installed safety systems. 8. Photographs of each item referred to in the guide in its installed position with descriptions to identify the items, cross-referenced to the text. PRELIMINARIES AND GENERAL CONDITIONS PS U May

8 2 Electrical Installations Workmanship and Materials 2.1 General Scope of Work Regulations Drawings for Approval Cables Consumer Units Lighting Lighting Switches Socket Outlets & Connection Units Mounting Heights Earthing & Bonding Final Sub-Circuits ELECTRICAL INSTALLATIONS WORKMANSHIP AND MATERIALS PS U May 2009

9 Electrical Installations Workmanship and Materials General This Section of the Specification deals with the general standards of materials and workmanship and approved methods in connection with the electrical installation works. This Section must be read and applied in conjunction with other detailed sections of the Specification and the drawings and schedule issued herewith. 2.2 Scope of Work Except for materials or items of equipment which are specified as being supplied and/or fixed for the works by others, these works shall include the supply, testing, delivery to site, erection, connection, finishing and putting into service of the whole of the materials, fittings and all cables and conduits necessary to complete the electrical installation works as specified and scheduled herein and/or indicated on the drawings issued herewith. 2.3 Regulations The whole of the installation shall be strictly in accordance with the following, unless otherwise specifically provided for herein:- (a) BS 7671:2008 requirements for Electrical Installations (17th Edition) including all relevant future amendments issued by the Institution of Engineering and Technology, (IET) Michael Faraday House, Stevenage, Herts SG1 2AY. (b) The regulations and conditions of supply of the appropriate electricity supply company. (c) The requirements under the Factories Act of HM Electrical Inspector of Factories and the relevant British Standards. (d) The Electricity at Work Regulations (e) The Electricity Supply Regulations 1988 (where appropriate). Should any of the above regulations be considered to override or be in conflict with any other of the above regulations, then pending the decision of the Consultant, the more stringent regulations shall be held to apply. 2.4 Drawings for Approval The Electrical Contractor shall prepare and issue via the Main Contractor all detailed installation drawings, including distribution, plant and layout drawings as required to enable the contract works to be integrated into the works as a whole, before the installation is commenced all in accordance with the main contract programme. 2.5 Cables Wiring to the outlets detailed in this specification and accompanying drawings shall be carried out with 300/500v PVC insulated PVC sheathed type. All cables shall have copper conductors and comply with BS 604:2000 (2006). Cabling recessed in walls shall have suitable means of mechanical protection Cables Under Floors and Above Ceilings Particular care needs to be taken when installing cables below floors or above ceilings. Cables passing under floors or above ceilings can be particularly vulnerable to damage, which can lead to the dangers of electric shock or fire. It is therefore important that cable runs are properly planned and that the cables are installed in such a manner as to afford compliance with the requirements of BS 7671:2008. Regulation requires that a cable installed under a floor or above a ceiling is run in such a position that it is not liable to be damaged by contact with the floor, the ceiling or any of their fixings. The regulation also requires that where a cable has to pass through a timber joist within a floor or ceiling construction, or through a ceiling batten, the cable shall :- 1. be at least 50mm from the top, or bottom as appropriate, of the joist or batten, or alternatively; 2. comply with one of the following requirements: (a) incorporate an earthed armour or metal sheath suitable for use as a protective conductor. (b) be of insulated concentric construction. (c) be protected by enclosure in earthed steel conduit securely supported. (d) have equivalent mechanical protection sufficient to prevent penetration of the cable by nails, screws and the like. A cable installed to meet condition 1 above will, in normal circumstances, be at a sufficient distance from the top, or bottom as appropriate, of the joist or batten to prevent a nail or screw penetrating the cable. In loft areas and ceiling voids, cables are particularly likely to come into contact with, or be totally enclosed in, thermal insulation. The adverse effect such thermal insulation has on the current-carrying capacity of cables must be taken into account in the circuit design. Alternatively, cables should be routed to avoid contact with thermal insulation. 2.6 Consumer Units Consumer units shall be magnolia in colour. The consumer unit shall comprise of all components (isolators, RCDs, RCBOs, MCBs and any other devices e.g. contactors, meters, bell transformers etc). 2.7 Lighting Standard Lampholders They shall incorporate a metal liner for added strength around the J slots. Ceiling rose must incorporate a flexible base material to avoid cracking on uneven ceilings Lamp Activated Type They shall only have access to live parts via a screwdriver. The safety mechanism cannot be bypassed by inserting screwdriver in the J slots and turning. Cable to be clamped via a captive cable clamp not via a tortuous path method. Battenholders and angled battenholders must be available Plug-in Lighting Should comply with BS Have 3 and 4 pin available and to be supplied with fixing screws Low Energy Lamps In order to comply with Part L of the Building Regulations, the Electrical Contractor shall provide the minimum number of pendants or battenholders with 3 J slots ELECTRICAL INSTALLATIONS WORKMANSHIP AND MATERIALS PS U May

10 2 Electrical Installations Workmanship and Materials designated by Eaton as their BC3 range together with 11W or 20W BC3 lamps as appropriate. 2.8 Lighting Switches Switches shall be minimum 10 amp rating and must be X rated as manufactured by Eaton Electric Limited. Where multiple switches are required, they shall be assembled in ganged units. Unless specified otherwise, flush switches shall have white moulded plates. Surface installations shall have metalclad plates. Must be able to substitute individual switch modules within a plate to allow for a combination of switch functions on the plate such as intermediate, key switch or neon indicators. Switches to be at least 32mm long to offer ease of switching. Grid switches shall clearly show function, rating, circuit diagram and terminal identification on the back of each module. Grid switches shall be at least 19mm wide to allow marking of legends. The Electrical Contractor shall be responsible for agreeing the correct position of switches with regard to door hangs etc., on site before installation. No claims for non-compliance to this requirement will be accepted. BS 7671:2008 (17th Edition of the IEE Regulations) and shall be PVC insulated self colour green/yellow. The Electrical Contractor should establish any PME conditions that apply with the incoming electrical service and all the necessary precautions laid down in the BS 7671:2008 (17th Edition of the IEE Regulations) shall apply with specified reference to Services Bonding Final Sub-Circuits The Electrical Contractor shall be responsible for the final sub-circuit distribution working drawing. He shall also be responsible for the calculations determining the size of the final sub-circuit cables and their enclosures. The maximum permitted voltage drop from the appropriate distribution board to the extremity of any such sub-circuit shall be calculated as indicated in the BS 7671:2008 (17th Edition of the IEE Regulations) from supply point to extremity of final sub-circuit. 2.9 Socket Outlets and Connection Units Socket outlets and connection units shall be rated 13 amp switched as manufactured by Eaton Electric Limited. Unless specified otherwise, flush sockets and connection units shall have white moulded plates. Surface installations shall have metalclad plates. All sockets and connection units shall be wired on ring main circuits, unless otherwise specified Mounting Heights Unless otherwise specified, all items of equipment shall be mounted at the following heights from finished floor level to the underside:- Lighting Switches & Shaver Sockets: 1.37M AFFL Socket Outlets: 0.4m or work top as applicable (approx. 1.2m AFFL) Connection Units: Adjacent fixed equipment or appliance Earthing and Bonding The Electrical Contractor shall be responsible for ensuring that the earthing and bonding system installed complies with the 17th Edition of the IEE Regulations for Electrical Installations, particularly with regard to exposed and extraneous conductive parts and exposed metallic parts of the building structure etc. All metal work which may provide a path to earth such as components of hot and cold water systems, heating systems, metallic waste pipes etc. within two metres of any switch, switch socket or other electrical Outlet less than 1500mm from the floor, shall have an impedance to earth to provide the required disconnection time as indicated in the relevant sections of the17th Edition Regulations. The Electrical Contractor shall provide the necessary bonding connections to meet this requirement. All earth continuity conductors and bonding leads shall be not less than the minimum sizes as given in 10 ELECTRICAL INSTALLATIONS WORKMANSHIP AND MATERIALS PS U May 2009

11 Description of Systems Mains Consumer Switchgear Kitchen Lounge Bedrooms Bathroom Garage Typical Accessories Layout & Selection Guide DESCRIPTION OF SYSTEMS PS U May

12 3 Description of Systems 3.1 Mains The Electricity Supply Company shall provide a suitable PME electricity supply for the dwelling terminating and connected to the incoming terminals on their meter and earth terminal. The Main Contractor shall pay the Electricity Supply Company the monies for the capital costs involved. The Electrical Contractor shall provide and install suitable cabling between the Regional Electricity Company s meter and the consumers main switchgear. This shall be either PVC single cables in trunking or PVC insulated and sheathed cabling. The single phase and neutral supply shall be assumed to be rated 100 amp. All cabling must be installed in accordance with BS 7671:2008 At the commencement of the contract, the Contractor shall commence the complete negotiations with the Electricity Supply Company for the electricity supply for the dwelling. The negotiations shall take account of any phased handover or commissioning by other Sub-Contractors where electricity supplies may be required by other trades to comply with the Main Contractor s programme of works. The Electrical Contractor shall liaise with the Electricity Supply Company on all their building work requirements. 3.2 Consumer Switchgear Main Control The main control shall be a flush or surface mounting consumer unit that shall be cream/white in colour. The consumer unit will be factory assembled (with the exception of miniature circuit breakers) and comply with the requirements of BS EN The consumer unit shall have a suitable number of outgoing ways with sufficient spare ways and be fitted with Type B Miniature Circuit Breakers to BS EN The main controlling DP isolator switch will be rated at no less than 100 amp. The secondary device will be RCCBs of minimum 63 amp rating and 30 ma sensitivity. The various circuits shall be arranged to comply with the requirements of the latest IEE wiring Regulations (BS 7671:2008). Your attention is drawn to Regulations (Additional protection by means of a 30mA RCD), & 2 (Segregation of circuits to avoid danger and minimise inconvenience in the event of a fault) and (Protection of wiring concealed in walls or partitions). Miniature Circuit Breakers (MCB) of the following ratings should be fitted. Eaton list No. Eaton list No. Circuit MCBs RCBOs details EAD06B EAD06BH30 6 amp for smoke detector EAD06B or EAD06BH30 or 6 amp or 10 amp for each lighting circuit EAD10B EAD10BH30 EAD06B EAD06BH30 6 amp for bell transformer EAD16B EAD16BH30 16 amp for 3 kw max. immersion heater EAD20B EAD20BH30 20 amp for central heating controller EAD32B EAD32BH30 32 amp for each ring main EAD40B EAD40BH30 40 amp for the cooker unit EAD40B EAD40BH30 40 amp for the electric shower up to 8kW EAD45B EAD45BH30 45 amp for the electric shower up to 10kW Typical Consumer Unit Schedule The following table shows a typical consumer unit layout where circuits are applicable. MCB Rating Wiring Description 6amp 1 x 1.5mm 2 twin + cpc PVC/LSF Downstairs lighting 6amp 1 x 1.5mm 2 twin + cpc PVC/LSF Upstairs lighting 6amp 1 x 1.5mm 2 twin + cpc PVC/LSF Smoke detectors 6amp 1 x 1.5mm 2 twin + cpc PVC/LSF Spare 6amp 1 x 1.5mm 2 twin + cpc PVC/LSF Heating 16amp 1 x 2.5mm 2 twin + cpc PVC/LSF Immersion heater 32amp 2 x2.5mm 2 twin + cpc PVC/LSF Ring main kitchen 32amp 2 x 2.5mm 2 twin + cpc PVC/LSF Ring main remainder 32amp 1 x 10mm 2 twin + cpc PVC/LSF Cooker 40amp 1 x 10mm 2 twin + cpc PVC/LSF Shower These circuits are suitably split over two or more RCD protected zones or else fed by individual RCBOs. Eaton list number EADXXB EAD16B The remaining spaces within the consumer unit shall be fitted with blanking pieces to afford ultimate protection Eaton s Ref No. ABPI. Note:- Other Eaton ancillary devices can also be fitted within the consumer unit i.e. various types of meters, timers, contactors, impulse relays, bell transformer etc., providing ultimate flexibility. Typical consumer units to provide compliance with 17th edition wiring regulations will be as follows: a) Dual RCD unit c/w 100A DP switch and 2 x 80A 30mA RCCB protected zones, e.g.ead12h80h80d. b) Dual RCD unit c/w 100A DP switch and 2 x 80A 30mA RCCB protected zone plus 3 circuits fed directly off the main switch for use with RCBOs, e.g.ead12h80h803d, or else c) An Isolator controlled unit with 100A DP main switch and arranged to feed all outgoing ways via individual RCBOs. e.g.ead11r. Economy 7 Consumer Unit (if fitted) The restricted tariff consumer unit shall be a surface mounting unit, factory assembled (with the exception of the circuit breakers) and comply with the 16kA conditional rating required by the amendments to BS EN The consumer unit shall have a suitable number of ways with sufficient spare ways and be fitted with type B Miniature Circuit Breakers complying with BS EN The consumer unit shall be surface mounted, insulated and must comply with BS7671: th edition of the wiring regulations. Eaton reference EAD10DD or EAD14DD with 2 x 100A DP isolators with sub-circuits protected by individual RCBOs of the correct rating. Miniature circuit breakers of the following ratings shall be fitted (to BS EN 60898) Circuit Identification Circuit details Suitably rated for each storage heater. 16A for immersion heater (3 kw max.) The circuit identification label shall be completed to give clear and permanent indication of the points and outlets connected to each. 12 DESCRIPTION OF SYSTEMS PS U May 2009

13 Description of Systems 3 The Electrical Contractor is to leave any operating instructions and/or labels supplied by manufacturers in a prominent place and is to instruct the tenant in the operation of MCBs, RCCBs and consumer units Typical Quantities of Socket Outlets Note: Exact location to be determined on site. Location Quantity Remarks Lounge 8 4 No. at TV location Dining Room 4 Kitchen 6 Excluding socket outlets controlled via FCUs for fridges, washing machines etc. Double Bedroom 4 Single Bedroom 4 Hall 2 Near telephone equipment if applicable Stairs / Landing 1 Utility Room 2 i.e. Twin socket outlet near appliances 3.3 Kitchen (See associated typical drawing) The electrical installation to the kitchen generally consists of power supplies to serve the following:- 1 Cooker 2 Appliances such as fridge/freezer, kettle, microwave, washing machine etc. 3 Electric fan/blow heaters. (if applicable) 4 Extractor Hood. 5 TV and associated aerial socket outlet. 6 Lighting. 7 Central heating system (if applicable). Wiring to kitchen equipment shall emanate from the main consumer unit. Where general purpose 13 amp socket outlets are installed, they shall be wired on a 32 amp ring main circuit separate from any other socket outlets within the dwelling Cooker A 45 amp cooker control unit or 45 amp DP switch shall be provided to serve the cooker. This unit shall receive an independent supply from the consumer unit fed from its own 32 amp MCB. The cooker control unit or switch shall be fixed approximately 300mm above the kitchen work-top and slightly to the side of the cooker. A 45 amp cable/cooker outlet plate should be fixed approximately 600mm AFFL directly behind the cooker. All wiring accessories are of Eaton manufacture and moulded products can be selected from one of 3 ranges: INTRA Thermo-setting plastic ( M references) EMA Thermoplastic, providing greater strength ( E references) COPA greater flexibility using clipon cover plates ( C references) The cable/cooker outlet plate allows for connection of the cooker flexible cable and be concealed from sight. (a) Cooker control unit Eaton M325N Eaton E325N Eaton C325NWH (b) Cable/Cooker outlet plate Eaton F2045/46 (white moulded) Cooker control unit also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators Appliances Kitchen appliances are generally plugged into 13 amp socket outlets. A reasonable number of sockets should be installed with due allowance for flexibility in the future. Twin 13 amp switched socket outlets shall be provided for general purposes, fixed approximately 300mm above the kitchen worktop. They shall not be installed within 1000mm from the centre of the kitchen sink unit. Kettles, toasters, microwaves, blenders, irons etc. will plug into these sockets. Fixed equipment such as fridges, freezers, washing machines, etc., where set into kitchen units shall be served by an appropriate 13 amp switched or un-switched socket outlet located behind the appliance approximately 600mm AFFL. These socket outlets shall be fed from the switched side of a 13 amp switched fused connection unit located directly above the socket outlet and fixed approximately 300mm above the kitchen work-top. The fused connection unit allows for switching off the appliance without the need for gaining access to the socket outlet located behind. Connection units to be complete with the appropriate appliance marking, i.e. freezer. Alternatively these fixed appliances can be switched off/on by means of a 20 amp double pole grid switch positioned above the worktop in the vicinity of the appliance. Up to a 4 gang grid plate can be used. (a) 4 gang grid plate Eaton M804 Eaton E804 Eaton C804WH The grid switch rockers to be clearly marked with the appliance being controlled: washing machine, tumble dryer, fridge, freezer etc. e.g. F8023WH, TD, FG or FZ. The grid switch units can either be part of the kitchen ring main or supplied via a separate MCB within the consumer unit. (a) Twin 13 amp switched socket outlet Eaton M622 Eaton E522 Eaton C622WH (b) Single 13 amp switched socket outlet Eaton M621 Eaton E521 Eaton C621WH (c) 13 amp switched fused connection unit with appliance marking Eaton M201XX Eaton E201XX Eaton C201XXWH Socket outlets and connection units also available in other COPA metalplate finishes i.e. DESCRIPTION OF SYSTEMS PS U May

14 3 Description of Systems All ranges also available with neon indicators Electrical Fan/Blow Heater A switched fused connection unit c/w flex outlet shall be provided adjacent the electric fan/blow heater. The final connection to the heater shall be by means of a suitably rated 3 core heat resistant flexible cable. The connection unit shall receive an independent supply backed up by a 16 amp MCB within the consumer unit. (a) 13 amp switched fused connection unit with flex outlet Eaton M201 Eaton E201 Eaton C201WH Connection unit also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators Extractor Hood A 13 amp switched fused connection unit c/w flex outlet shall be provided adjacent the kitchen extractor hood. Connection between the hood and the connection unit shall be carried out by means of a suitably rated 3 core heat resistant flexible cable. The extractor hood connection unit shall be wired into the kitchen ring main circuit. (a) 13 amp switched fused connection unit with flex outlet Eaton M201 Eaton E201 Eaton C201WH Fused connection unit also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators TV/Aerial Socket Should provision for a TV be required within the kitchen a TV aerial socket outlet shall be provided. The location of the TV aerial socket being dependant on the required kitchen/appliance layout. From the TV outlet a Co-axial cable shall be provided and installed into the roof space for connecting to an independent roof mounted TV aerial. Alternatively connect into a television distribution amplifier in the roof space. The amplifier shall have an incoming Co-axial cable connected to one exterior TV aerial. The amplifier supply shall be connected into either a lighting or ring main socket outlet circuit, with a suitable means of fused isolation. (a) TV Co-axial socket outlet Eaton M351 Eaton E351 Eaton C351WH (b) Single 13 amp switched socket outlet Eaton M621 Eaton E521 Eaton C621WH (c) Associated surface box Eaton F4501 TV Co-axial socket outlet also available in other COPA metalplate finishes i.e Lighting Lighting to the kitchen shall be switched by means of a rocker operated 10amp AC type X rated BS EN single pole one way or two way plate switch fixed at a height of approximately 1400mm AFFL. The lighting circuit shall be connected to a 6 amp MCB within the consumer unit. (Each floor shall have its own lighting circuit). If a pendant(s) is to be used a combined pendant set consisting of ceiling rose, flex and BC lamp holder shall be provided. (a) 10 amp single pole plate switch Eaton M011 Eaton E011 Eaton C011WH (b) Pendant set 6 /9 Eaton F1250/51 (c) Pendant set 4 for BC3 Eaton F1260 Low Energy Lamps 11 BC3 Lamp Eaton F1266 Plate switch also available in other COPA metalplate finishes i.e Central Heating System If a gas fired hot water/central heating system is provided it is generally controlled by a programmer located in the kitchen. The programmer shall provide the facility to independently control the hot water system and hot water/central heating system together. The programmer shall receive a 3 amp mains supply via a 13 amp switched fused connection unit with flex outlet. The system consisting of, boiler, pump set, motorised valve, room stat and immersion heater stat shall all be wired from the programmer as detailed in the programmer s circuit wiring details. If backup to the gas fired hot water system is provided by an immersion heater in the Hot Water Cylinder this shall receive a 16 amp supply via a 20 amp DP switch fed by an independent 16amp MCB within the consumer unit. (a) 13 amp switched fused connection unit with flex outlet Eaton M201 Eaton E201 Eaton C201WH 14 DESCRIPTION OF SYSTEMS PS U May 2009

15 Description of Systems 3 (b) 20amp DP switch marked water heater Eaton M303 Eaton E303 Eaton C303WH Connection unit and DP switch also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators. An all electric alternative hot water heating system shall comprise of an insulated storage cylinder located in an airing cupboard. Each cylinder should contain two 3kW side entry immersion heaters, one located at the bottom of the cylinder and one at the top. The immersion heaters shall be controlled by an Electronic Water Heating Controller with boost facility fixed at the side of the cylinder. The controller will allow the immersion heater to utilise off-peak electricity and also enable it to be programmed to provide hot water when it is required. The controller shall receive an independent supply via a 20 amp MCB within the consumer unit. 3.4 Lounge (See associated typical drawing) The electrical installation to the lounge generally consists of power supplies to serve the following:- (1) TV, video recorder, SKY/Cable/Digital box, stereo system, table lamps, telephone answer machine etc. (2) TV Co-axial socket system. (3) Telephone system. (4) Storage heaters. (5) Lighting. Wiring to the lounge shall emanate from the main consumer unit. Where general purpose 13 amp socket outlets are installed they shall be wired on a 32 amp ring main circuit with other general power points within the dwelling, but not on the same circuit as the kitchen power points General 13 amp Socket Outlets Twin 13 amp switched socket outlets shall generously be located around the room fixed at a height of approximately 400mm AFFL. Attention should be drawn to where furniture is likely to be positioned and this may well dictate the likely location of power points for the TV etc. At the TV position provision shall be made for 2 No. Twin 13 amp switched socket outlets, these shall provide power for :- (a) TV. (b) Video Recorder. (c) Subscription TV unit. (d) Table lamp. Other twin switched socket outlets around the room shall be required to serve say, stereo system, telephone answer machine and lamp stand. At least one additional twin switched socket outlet shall be provided for plugging in a vacuum cleaner doing away with the need for continually unplugging a fixed item. (a) Twin 13 amp switched socket outlet Eaton M622 Eaton E522 Eaton C622WH Socket outlet also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators TV Co-axial Socket System There is always a requirement for a TV aerial system within the lounge. A TV Co-axial socket outlet shall be fixed adjacent the 2 No. Twin 13 amp switched socket outlets intended to serve the TV system. The outlet shall be fixed at a height of approximately 400mm AFFL. From the TV outlet a Co-axial cable shall be provided and installed into the roof space for connecting to an independent roof mounted TV aerial. Alternatively connect into a television distribution amplifier in the roof space. The amplifier shall have an incoming Coaxial cable connected to one exterior TV aerial. The amplifier supply shall be connected into either a lighting or ring main socket outlet circuit, with a suitable means of fused isolation. (a) TV Co-axial socket outlet Eaton M351 Eaton E351 Eaton C351WH (b) Single 13 amp switched socket outlet Eaton M621 Eaton E521 Eaton C621WH (c) Lounge plate assembly Eaton M951 (2 x 13A switched socket outlet quad plate, BT secondary) (d) Associated metal box Eaton F8345 TV Co-axial socket outlet also available in other COPA metalplate finishes i.e Telephone System A telephone outlet socket shall be fixed adjacent a suitable twin switched socket outlet (for connecting of an answer machine). The outlet shall be fixed at a height of approximately 400mm AFFL. A suitable recessed containment system complete with draw wire shall be installed from this point to the telephone intake position. Further telephone outlet points shall be provided with a suitable recessed containment system complete with draw wire to cater for interconnecting telephone cabling between the two or more points. (a) Telephone line jack (master) Eaton M360 Eaton E360 Eaton C360WH DESCRIPTION OF SYSTEMS PS U May

16 3 Description of Systems (b) Telephone line jack (secondary) Eaton M361 Eaton E361 Eaton C361WH Telephone outlets also available in other finishes i.e Storage Heaters Where off-peak combination storage heaters are installed they shall be provided with 2 No. independent supplies. The main off-peak supply shall emanate from the off-peak section of the consumer unit via suitably rated MCB and shall terminate at the heater in a local 20 amp DP switch complete with flex outlet. The on-peak supply shall emanate from the room ring main circuit and terminate at a 13 amp switched fuse connection unit with flex outlet. Final connections to the storage heater shall be carried out in suitably rated 3 core heat resistant flexible cable. (a) 20 amp DP switch with flex outlet Eaton M301 Eaton E301 Eaton C301WH (b) 13 amp switched fused connection unit with flex outlet Eaton M201 Eaton E201 Eaton C201WH DP switch and connection unit also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators Bell/Chime System The lounge or hall shall be provided with a front door mains operated bell/chime system. The extra low voltage transformer for the system shall be fitted within the consumer unit and receive its mains supply from an adjacent 6amp MCB. From the secondary side of the transformer twin bell wire (min 0.5mm2) shall interconnect the front door bell push and bell/chime in the lounge or hall. Wiring shall be installed away from any mains voltage cabling. (a) Consumer unit bell transformer Eaton AA2BT (b) Splashproof moulded bell push Eaton F Lighting Lighting to the lounge shall generally consist of centrally located pendants. The pendants shall be switched by means of a rocker operated 10 amp AC type X rated BS EN single pole one way or two way plate switch fixed at a height of approximately 1400mm AFFL. The lighting circuit shall be connected to a 6 amp MCB within the consumer unit. (Each floor shall have its own lighting circuit). A combined pendant set shall be installed consisting of ceiling rose, flex and BC lamp holder. Alternatively if wall lights are to be installed, wall outlets and associated 3 pin system LSC plugs should be utilised. If the lamp fitted in the centrally located pendant or wall lights is a dimmable type the 10 amp single pole plate switch can be replaced by a rotary dimmer switch rated at 400 watts max. (a) 10 amp single pole plate switch Eaton M011/M021 Eaton E011/E021 Eaton C011WH/C021WH (b) Pendant set - 6 /9 Eaton F1250/51 (c) Pendant set for BC3 Low Energy Lamps Eaton F1260 BC3 11W low energy lamp, soft white Eaton F1266 (d) Associated independent LSC plug Eaton F8540 (e) 1 Gang 400 watt 1 way dimmer switch Eaton M9041 Eaton E9141 (2 way) Eaton C9141WH (2 way) Switch also available in other COPA metalplate finishes i.e Burglar Alarm System Where a burglar alarm system is installed by a specialist contractor an independent 6 amp supply via an MCB within the consumer unit shall be provided. The supply shall terminate at an un-switched 13 amp connection unit fused 3amp adjacent the burglar alarm control box for connection by the specialist contractor. (a) 13 amp un-switched fused connection unit with flex outlet and 3 amp fuse Eaton M201A3 Connection unit also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators. 3.5 Bedrooms (See associated typical drawing) The electrical installation to the bedroom generally consists of power supplies to serve the following:- (1) TV, video recorder, bedside lamps, wall units lighting, radio alarm clocks etc. (2) T.V. Co-axial socket system. (3) Telephone system. (4) Storage heaters. (5) Lighting. 16 DESCRIPTION OF SYSTEMS PS U May 2009

17 Description of Systems 3 (6) Combined smoke detector/sounder. (Landing) Wiring to the bedroom shall emanate from the main consumer unit. Where general purpose 13 amp socket outlets are installed they shall be wired on a 32 amp ring main circuit with other general power points within the dwelling, but not on the same circuit as the kitchen power points General 13 amp Socket Outlets Twin 13 amp switched socket outlets shall generously be located around the room fixed at a height of approximately 400mm AFFL. Attention should be drawn to where furniture is likely to be positioned and this may well dictate the likely location of power points. A twin 13 amp switched socket outlet located either side of the bed shall be provided for a TV, video recorder, radio alarm clock and table lamp. A twin 13 amp switched socket outlet shall be provided at the side of wall units for connecting unit lights and also at the side of a dressing table for integral lights and use of a hair dryer. A twin 13 amp switched socket outlet shall be provided in an accessible position, say close to the door for plugging in of a vacuum cleaner. (a) Twin 13 amp switched socket outlet Eaton M622 Eaton E522 Eaton C622WH Socket outlet also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators T.V. Co-axial Socket System A TV Co-axial socket outlet shall be fixed adjacent to a twin 13 amp switched socket outlet at a height of approximately 400mm AFFL. From the TV outlet a Co-axial cable shall be provided and installed into the roof space for connecting to an independent roof mounted TV aerial. Alternatively connect into a television distribution amplifier in the roof space. The amplifier shall have an incoming Coaxial cable connected to one exterior TV aerial. The amplifier supply shall be connected into either a lighting or ring main socket outlet circuit, with a suitable means of fused isolation. (a) TV Co-axial socket outlet Eaton M531 Eaton E531 Eaton C531WH (b) Single 13 amp switched socket outlet Eaton M611 Eaton E511 Eaton C611WH (c) Associated surface box Eaton F4501 (white moulded) TV Co-axial socket outlet also available in other COPA metalplate finishes i.e Telephone System A telephone outlet socket shall be fixed adjacent to a twin switched socket outlet (for connecting of say a portable phone). The outlet shall be fixed at a height of approximately 400mm AFFL. A suitable recessed containment system complete with draw wire shall be installed from this point to the main telephone outlet within the lounge to cater for interconnecting of cabling and also to the main intake position. (a) Telephone line jack (master) Eaton M360 Eaton E360 Eaton C360WH (b) Telephone line jack (secondary) Eaton M361 Eaton E361 Eaton C361WH Telephone outlets also available in other COPA metalplate finishes i.e Storage Heaters Where off-peak storage heaters are installed they shall be provided with an independent supply. The supply shall emanate from the off-peak section of the consumer unit via a suitably rated MCB and shall terminate at the heater in a local 20 amp DP switch complete with flex outlet. Final connections to the storage heater shall be carried out in suitably rated 3 core heat resistant flexible cable. (a) 20 amp DP switch with flex outlet Eaton M301 Eaton E301 Eaton C301WH DP Switch also available in other COPA metalplate finishes i.e. All ranges also available with neon indicators Lighting Lighting to the bedroom shall generally consist of a centrally located pendant. The pendant shall be switched by means of a rocker operated 10 amp AC type X rated BS EN single pole one way plate switch fixed at a height of approximately 1400mm AFFL. A combined pendant set shall be installed consisting of; ceiling rose, flex and B.C. or BC3 lamp holder. Two way switching shall be installed to stairs and landing outside the bedroom. The lighting circuit shall be connected to a 6 amp MCB within the consumer unit. (Each floor shall have its own lighting circuit). DESCRIPTION OF SYSTEMS PS U May