Second Revision No. 601 NFPA 70 2015 [ Section No. 300.4 [Excluding any Sub Sections] ] Where subject to physical damage, conductors, raceways, and cables shall be protected. Informational Note: Minor damage to a raceway, cable armor, or cable insulation does not necessarily violate the integrity of either the contained conductors or the conductors insulation. Submittal Date: Mon Nov 02 11:49:07 EST 2015 Committee The informational note provides guidance to an electrical inspector that minor Statement: (superficial) damage to the jacket of a cable is not an issue. The first sentence of the proposed informational note is unnecessary since it states the obvious that physical damage doesn t just occur from normal building operation. Public Comment No. 1028 NFPA 70 2015 [Section No. 300.4 [Excluding any Sub Sections]] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 1/37
Second Revision No. 623 NFPA 70 2015 [ Section No. 300.5(A) ] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 2/37
(A) Minimum Cover Requirements. http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 3/37
Direct buried cable, or conduit, or other raceways shall be installed to meet the minimum cover requirements of Table 300.5. Table 300.5 Minimum Cover Requirements, 0 to 1000 Volts, Nominal, Burial in Millimeters (Inches) Location of Wiring Method or Circuit All locations not specified below Column 1 Direct Burial Cables or Conductors Type of Wiring Method or Circuit Column 2 Rigid Metal Conduit or Intermediate Metal Conduit Column 3 Nonmetallic Raceways Listed for Direct Burial Without Concrete Encasement or Other Approved Raceways Column 4 Residential Branch Circuits Rated 120 Volts or Less with GFCI Protection and Maximum Overcurrent Protection of 20 Amperes Column 5 Circuits for Control of Irrigation and Landscape Lighting Limited to Not More Than 30 Volts and Installed with Type UF or in Other Identified Cable or Raceway mm in. mm in. mm in. mm in. mm in. 600 24 150 6 450 18 300 12 150 a, b In trench below 50 mm (2 in.) thick concrete or 450 18 150 6 300 12 150 6 150 6 equivalent Under a building 0 0 0 0 0 0 0 0 0 0 (in raceway or Type MC or Type MI cable identified for direct burial) Under minimum of 102 mm (4 in.) thick concrete exterior slab with no vehicular traffic and the slab 450 18 100 4 100 4 extending not less than 152 mm (6 in.) beyond the underground installation (in raceway or Type MC or Type MI cable identified for direct burial) 6 a, b (in raceway or Type MC or Type MI cable identified for direct burial) 150 6 150 6 (direct burial) (direct burial) 100 4 100 4 (in raceway) (in raceway) Under streets, highways, roads, 600 alleys, driveways, 24 600 24 600 24 600 24 600 24 and parking lots http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 4/37
One and twofamily dwelling driveways and outdoor parking 450 18 450 18 450 18 300 12 450 18 areas, and used only for dwellingrelated purposes In or under airport runways, including adjacent 450 areas where 18 450 18 450 18 450 18 450 18 trespassing prohibited a A lesser depth shall be permitted where specified in the installation instructions of a listed low voltage lighting system. b A depth of 150 mm (6 in.) shall be permitted for pool, spa, and fountain lighting, installed in a nonmetallic raceway, limited to not more than 30 volts where part of a listed low voltage lighting system. Notes: 1. Cover is defined as the shortest distance in millimeters mm (inches in. ) measured between a point on the top surface of any direct buried conductor, cable, conduit, or other raceway and the top surface of finished grade, concrete, or similar cover. 2. Raceways approved for burial only where concrete encased shall require concrete envelope not less than 50 mm (2 in.) thick. 3. Lesser depths shall be permitted where cables and conductors rise for terminations or splices or where access is otherwise required. 4. Where one of the wiring method types listed in Columns 1 through 3 is used for one of the circuit types in Columns 4 and 5, the shallowest depth of burial shall be permitted. 5. Where solid rock prevents compliance with the cover depths specified in this table, the wiring shall be installed in a metal raceway, or a nonmetallic raceway permitted for direct burial. The raceways shall be covered by a minimum of 50 mm (2 in.) of concrete extending down to rock. Supplemental Information File Name 300.5_SR623_LM.docx Description Submittal Date: Tue Nov 03 10:35:31 PST 2015 http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 5/37
Committee Swimming pool, spa, and fountain low voltage lighting in a nonmetallic raceway or Statement: similar installation should not be required to be installed any deeper than any other Column 5 less than 30 volt low voltage landscape lighting. Since the actual text covering pools, spas and fountains is not located in Column 5, there are inspectors who require the nonmetallic raceway containing these low voltage lighting conductors to be installed at an 18 inch depth. http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 6/37
Second Revision No. 602 NFPA 70 2015 [ Section No. 300.7(B) ] (B) Expansion, Expansion Deflection, and Deflection Fittings. Raceways shall be provided with expansion, expansion deflection, or deflection fittings where necessary to compensate for thermal expansion, deflection, and contraction. Informational Note: Table 352.44 and Table 355.44 provide the expansion information for polyvinyl chloride (PVC) and for reinforced thermosetting resin conduit (RTRC), respectively. A nominal number for steel conduit can be determined by multiplying the expansion length in Table 352.44 by 0.20. The coefficient of expansion for steel electrical metallic tubing, intermediate metal conduit, and rigid metal conduit is 1.170 10 5 (0.0000117 mm per mm of conduit for each C in temperature change) [0.650 10 5 (0.0000065 in. per inch of conduit for each F in temperature change)]. A nominal number for aluminum conduit and aluminum electrical metallic tubing can be determined by multiplying the expansion length in Table 352.44 by 0.40. The coefficient of expansion for aluminum electrical metallic tubing and aluminum rigid metal conduit is 2.34 10 5 (0.0000234 mm per mm of conduit for each C in temperature change) [1.30 10 5 (0.000013 in. per inch of conduit for each F in temperature change)]. Submittal Date: Mon Nov 02 13:01:37 EST 2015 Committee The revised text makes it clear to inspectors, designers, and contactors that Statement: expansion deflection and deflection fittings are acceptable to be used with raceways to address thermal expansion, deflection, and contraction. Revising the text also requires a revision of the title to this subsection. Public Comment No. 99 NFPA 70 2015 [Section No. 300.7(B)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 7/37
Second Revision No. 603 NFPA 70 2015 [ Section No. 300.11(B)(1) ] (1) Fire Rated Assemblies. Wiring located within the cavity of a fire rated floor ceiling or roof ceiling assembly shall not be secured to, or supported by, the ceiling assembly, including the ceiling support wires. An independent means of secure support shall be provided and shall be permitted to be attached to the assembly. Where independent support wires are used, they shall be distinguishable by color, tagging, or other effective means from those that are part of the fire rated design. Exception: The ceiling support system shall be permitted to support wiring and equipment that have been tested as part of the fire rated assembly. Informational Note: One method of determining fire rating is testing in accordance with ANSI/ASTM E119 2014 2015, Method for Fire Tests of Building Construction and Materials. Submittal Date: Mon Nov 02 13:48:28 EST 2015 : The ANSI/ASTM E119 has been changed from 2014 to 2015. Public Comment No. 122 NFPA 70 2015 [Section No. 300.11(B)(1)] Public Comment No. 801 NFPA 70 2015 [Section No. 300.11(B)(1)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 8/37
Second Revision No. 604 NFPA 70 2015 [ Section No. 300.19(A) ] (A) Spacing Intervals Maximum. Conductors in vertical raceways shall be supported if the vertical rise exceeds the values in Table 300.19(A). At least one support method shall be provided for each conductor or cable assembly at the top of the vertical raceway or as close to the top as practical. Intermediate supports shall be provided as necessary to limit supported conductor lengths to not greater than those values specified in Table 300.19(A). Exception: Steel wire armor cable shall be supported at the top of the riser with a cable support that clamps the steel wire armor. A safety device shall be permitted at the lower end of the riser to hold the cable in the event there is slippage of the cable in the wire armored cable support. Additional wedge type supports shall be permitted to relieve the strain on the equipment terminals caused by expansion of the cable under load. Table 300.19(A) Spacings for Conductor Supports Conductors Conductor Size Support of Conductors in Vertical Raceways Aluminum or Copper Clad Aluminum Copper m ft m ft 18 AWG through 8 AWG Not greater than 30 100 30 100 6 AWG through 1/0 AWG Not greater than 60 200 30 100 2/0 AWG through 4/0 AWG Not greater than 55 180 25 80 Over 4/0 AWG through 350 kcmil Not greater than 41 135 18 60 Over 350 kcmil through 500 kcmil Not greater than 36 120 15 50 Over 500 kcmil through 750 kcmil Not greater than 28 95 12 40 Over 750 kcmil Not greater than 26 85 11 35 Submittal Date: Mon Nov 02 13:51:21 EST 2015 http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 9/37
Committee Statement: Deleting cable assembly ensures that each individual conductor is supported at the top of a vertical raceway. Public Comment No. 1151 NFPA 70 2015 [Section No. 300.19(A)] Second Revision No. 605 NFPA 70 2015 [ Section No. 300.22(C)(3) ] (3) Equipment. Electrical equipment with a metal enclosure, or electrical equipment with a nonmetallic enclosure listed for use within an air handling space and having low smoke and heat release properties, and associated wiring material suitable for the ambient temperature shall be permitted to be installed in such other space unless prohibited elsewhere in this Code. Informational Note: One method to determine low smoke and heat release properties is that the equipment exhibits a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a peak heat release rate of 100kW or less when tested in accordance with ANSI/UL 2043 2008 2013, Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air Handling Spaces. Exception: Integral fan systems shall be permitted where specifically identified for use within an air handling space. Submittal Date: Mon Nov 02 14:16:41 EST 2015 Committee Statement: This updates the informational note to the latest version of UL 2043. ANSI has been retained in the title of the UL Standard. Public Comment No. 163 NFPA 70 2015 [Section No. 300.22(C)(3)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 10/37
Second Revision No. 624 NFPA 70 2015 [ Section No. 300.37 ] 300.37 Aboveground Wiring Methods. Aboveground conductors shall be installed in rigid metal conduit, in intermediate metal conduit, in electrical metallic tubing, in RTRC and PVC conduit, in cable trays, in auxiliary gutters, as busways, as cablebus, in other identified raceways, or as exposed runs of metal clad cable suitable for the use and purpose. In locations accessible to qualified persons only, exposed runs of Type MV cables, bare conductors, and bare busbars shall also be permitted. Busbars shall be permitted to be either copper or aluminum. Exception: Airfield lighting cable used in series circuits that are powered by regulators and installed in restricted airport lighting vaults shall be permitted as exposed cable installations. Informational Note: FAA L 824 cables installed as exposed runs within a restricted vault area are common applications. Submittal Date: Tue Nov 03 11:12:31 PST 2015 Committee This revision recognizes that these cables are often installed exposed within a Statement: restricted airport lighting vault to facilitate easy access for modifications and reconnections during emergency situations. Public Comment No. 108 NFPA 70 2015 [Section No. 300.37] Public Comment No. 113 NFPA 70 2015 [Section No. 300.37] Public Comment No. 115 NFPA 70 2015 [Section No. 300.37] Public Comment No. 1472 NFPA 70 2015 [Section No. 300.37] Public Comment No. 1496 NFPA 70 2015 [Section No. 300.37] Public Comment No. 246 NFPA 70 2015 [Section No. 300.37] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 11/37
Second Revision No. 606 NFPA 70 2015 [ Section No. 590.4(G) ] (G) Splices. A box, conduit body, or other enclosure, with a cover installed, shall be required for all splices except where: (1) The circuit conductors being spliced are all from nonmetallic multiconductor cord or cable assemblies, provided that the equipment grounding continuity is maintained with or without the box. (2) The circuit conductors being spliced are all from metal sheathed cable assemblies terminated in listed fittings that mechanically secure the cable sheath to maintain effective electrical continuity. Submittal Date: Mon Nov 02 16:08:00 EST 2015 Committee Statement: The addition of nonmetallic ensures that (1) applies to splices of multiconductor cords or cable assemblies with a nonmetallic jacket. Public Comment No. 826 NFPA 70 2015 [Section No. 590.4(G)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 12/37
Second Revision No. 607 NFPA 70 2015 [ Section No. 590.4(J) ] (J) Support. Cable assemblies and flexible cords and cables shall be supported in place at intervals that ensure that they will be protected from physical damage. Support shall be in the form of staples, cable ties, straps, or similar type fittings installed so as not to cause damage. Cable assemblies and flexible cords and cables installed as branch circuits or feeders shall not be installed on the floor or on the ground. Extension cords shall not be required to comply with 590.4(J). Multiconductor cord or cable of a type identified in Table 400.4 for hard usage or extra hard usage shall not be required to comply with 590.4(J). Vegetation shall not be used for support of overhead spans of branch circuits or feeders. Exception: For holiday lighting in accordance with 590.3(B), where the conductors or cables are arranged with strain relief devices, tension take up devices, or other approved means to avoid damage from the movement of the live vegetation, trees shall be permitted to be used for support of overhead spans of branch circuit conductors or cables. Submittal Date: Mon Nov 02 16:11:00 EST 2015 Committee Multiconductor cords or cables that are identified in Table 400.4 for hard usage or Statement: extra hard usage shall not be required to comply with 590.4(J) as far as support is concerned. The extra text helps clarify what types of cords are acceptable for this temporary application. Public Comment No. 1143 NFPA 70 2015 [Section No. 590.4(J)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 13/37
Second Revision No. 608 NFPA 70 2015 [ Section No. 590.6(B) ] (B) Use of Other Outlets. For temporary wiring installations, receptacles, other than those covered by 590.6(A)(1) through (A)(3) used to supply temporary power to equipment used by personnel during construction, remodeling, maintenance, repair, or demolition of buildings, structures, or equipment, or similar activities, shall have protection in accordance with (B)(1), (B)(2), or the assured equipment grounding conductor program in accordance with (B)(2) (3). (1) GFCI Protection. Ground fault circuit interrupter protection for personnel. (2) SPGFCI Protection. Special purpose ground fault circuit interrupter protection for personnel. (3) Assured Equipment Grounding Conductor Program. A written assured equipment grounding conductor program continuously enforced at the site by one or more designated persons to ensure that equipment grounding conductors for all cord sets, receptacles that are not a part of the permanent wiring of the building or structure, and equipment connected by cord and plug are installed and maintained in accordance with the applicable requirements of 250.114, 250.138, 406.4(C), and 590.4(D). (a) The following tests shall be performed on all cord sets, receptacles that are not part of the permanent wiring of the building or structure, and cord and plug connected equipment required to be connected to an equipment grounding conductor: (1) All equipment grounding conductors shall be tested for continuity and shall be electrically continuous. (2) Each receptacle and attachment plug shall be tested for correct attachment of the equipment grounding conductor. The equipment grounding conductor shall be connected to its proper terminal. (3) All required tests shall be performed as follows: a. Before first use on site b. When there is evidence of damage c. Before equipment is returned to service following any repairs d. At intervals not exceeding 3 months (b) The tests required in item (2) (3) (a) shall be recorded and made available to the authority having jurisdiction. Supplemental Information File Name Description 590.6_B_SR608_JS.docx Word document shows changes made in SR 608 http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 14/37
Submittal Date: Mon Nov 02 16:19:21 EST 2015 Committee The changes to 590.6(B) involving special purpose ground fault circuit interrupter Statement: protection (SPGFCI) for personnel are accepted since Panel 2 has accepted a new definition of SPGFCI, however, Equipment Ground Fault Protective Devices (EGFPD) is listed by UL for equipment protection, not personnel protection. Since the requirements in 590.6 are for protection of personnel, the changes suggested for EGFPD are not accepted. Public Comment No. 615 NFPA 70 2015 [Section No. 590.6(B)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 15/37
Second Revision No. 609 NFPA 70 2015 [ Section No. 725.3(C) ] (C) Ducts, Plenums, and Other Air Handling Spaces. Class 1, Class 2, and Class 3 circuits installed in ducts, plenums, or other space used for environmental air shall comply with 300.22. Exception No. 1: As permitted in Class 2 and Class 3 cables selected in accordance with Table 725.154 and installed in accordance with 725.135(B) and 300.22(B), Exception shall be permitted to be installed in ducts specifically fabricated for environmental air.. Exception No. 2: Class 2 and Class 3 cables selected in accordance with Table 725.154 and installed in accordance with 725.135(C) shall be permitted to be installed in other spaces used for environmental air (plenums). Submittal Date: Mon Nov 02 16:24:52 EST 2015 Committee The First Revision FR 614 modified 300.22(B) by adding a new Exception indicating Statement: Class 2 and Class 3 cables are permitted in ducts specifically fabricated for environmental air with two conditions (a) The wiring methods or cabling systems shall be permitted only if necessary to connect to equipment or devices associated with the direct action upon, or sensing of the contained air and (b) The total length of such wiring methods or cabling systems shall not exceed 1.2 m (4 ft). These two conditions correspond to Section 4.3.4.2 in NFPA 90A 2015. The 2017 First Revision FR 614 in 300.22(B) reads as follows: Exception: Wiring methods and cabling systems, listed for use in other spaces used for environmental air (plenums), shall be permitted to be installed in ducts specifically fabricated for environmental air handling purposes under the following conditions: (a) The wiring methods or cabling systems shall be permitted only if necessary to connect to equipment or devices associated with the direct action upon, or sensing of the contained air and (b) The total length of such wiring methods or cabling systems shall not exceed 1.2 m (4 ft). Class 2 or Class 3 plenum rated cable is acceptable in ducts specifically fabricated http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 16/37
for environmental air but only where connecting to equipment used to sense or has direction action on the contained air and limited to a maximum of 4foot length based on NFPA 90A. Public Comment No. 460 NFPA 70 2015 [Section No. 725.3(C)] Second Revision No. 610 NFPA 70 2015 [ New Section after 725.121(B) ] (C) The power sources for limited power circuits in 725.121(A)(3) and limited power circuits for listed audio/video information technology (equipment) and listed industrial equipment in 725.121(A)(4) shall have a label indicating the maximum voltage and current output for each connection point. The effective date shall be January 1, 2018. Submittal Date: Mon Nov 02 17:03:37 EST 2015 Committee This new section addresses labeling of limited power circuit output connection Statement: points on listed IT equipment and listed industrial control panels and equipment. Bundling of large numbers of Class 2 conductors from IT servers and other similar IT and industrial equipment can create safety issues with very small current levels so having the output ports identified with the current and voltage rating is critical so the installer can connect the proper cable types. Labeling the output connections will permit the installer to have ready access to the current and voltage levels at the point of connection at the equipment, rather than internally within the equipment. The effective date was inserted to allow the manufacturers to comply with this requirement. Public Comment No. 1351 NFPA 70 2015 [New Section after 725.121] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 17/37
Second Revision No. 612 NFPA 70 2015 [ Section No. 725.133 ] 725.133 Installation of Conductors and Equipment in Cables, Compartments, Cable Trays, Enclosures, Manholes, Outlet Boxes, Device Boxes, Raceways, and Cable Routing Assemblies for Class 2 and Class 3 Circuits. Conductors and equipment for Class 2 and Class 3 circuits shall be installed in accordance with 725.135 through 725.143 725.144. Submittal Date: Mon Nov 02 19:38:52 EST 2015 : The addition of 725.144 requires modification of 725.133. Public Comment No. 689 NFPA 70 2015 [Section No. 725.133] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 18/37
Second Revision No. 613 NFPA 70 2015 [ Section No. 725.135(A) ] (A) Listing. Class 2, Class 3, and PLTC cables installed in buildings shall be listed and labeled. Submittal Date: Tue Nov 03 08:10:11 PST 2015 Committee FR 638 already accepted this text. The panel reaffirms its stance on this topic: By Statement: adding the word "labeled," it will identify that listed products also need to be labeled. Both terms "listed" and "labeled" are defined in Article 100, but are not used consistently throughout the NEC. Public Comment No. 1423 NFPA 70 2015 [Section No. 725.135(A)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 19/37
Second Revision No. 620 NFPA 70 2015 [ Section No. 725.135(K) ] (K) Other Building Locations. The following wires and cables shall be permitted to be installed in building locations other than the locations covered in 725.135(B) through (I): (1) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, and PLTC cables (2) A maximum of 3 m (10 ft) of exposed Type CL2X wires and cables in nonconcealed spaces (3) A maximum of 3 m (10 ft) of exposed Type CL3X wires and cables in nonconcealed spaces (4) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, and PLTC cables installed in the following: a. Plenum communications raceways b. Plenum cable routing assemblies c. Riser communications raceways d. Riser cable routing assemblies e. General purpose communications raceways f. General purpose cable routing assemblies (5) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, CL2X, CL3X, and PLTC cables installed in raceways recognized in Chapter 3 (6) Type CMUC undercarpet communications wires and cables installed under carpet, floor covering, modular tiles, or planks. Carpet, floor covering, modular tiles, or planks shall be free floating and shall use interlocking means to attach to each other or shall be adhered to the floor and shall be attached with release type adhesives, but shall not be attached to the floor using grout, nails, or screws modular flooring, and planks Submittal Date: Tue Nov 03 09:59:16 PST 2015 Committee Type CMUC under carpet communication wire and cables are permitted to be Statement: installed under carpet with an installation expansion for modular flooring and planks. http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 20/37
The installation instructions for free floating and interlocking does not necessarily apply to all kinds of modular flooring and planks and could be overly restrictive. Public Comment No. 223 NFPA 70 2015 [Section No. 725.135(K)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 21/37
Second Revision No. 621 NFPA 70 2015 [ Section No. 725.135(L) ] (L) Multifamily Dwellings. The following wires and cables shall be permitted to be installed in multifamily dwellings in locations other than the locations covered in 725.135(B) through (I): (1) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, and PLTC wires and cables (2) Type CL2X wires and cables less than 6 mm ( 1 4 in.) in diameter in nonconcealed spaces (3) Type CL3X wires and cables less than 6 mm ( 1 4 in.) in diameter in nonconcealed spaces (4) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, and PLTC wires and cables installed in the following: a. Plenum communications raceways b. Plenum cable routing assemblies c. Riser communications raceways d. Riser cable routing assemblies e. General purpose communications raceways f. General purpose cable routing assemblies (5) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, CL2X, CL3X, and PLTC wires and cables installed in raceways recognized in Chapter 3 (6) Type CMUC undercarpet communications wires and cables installed under carpet, floor covering, modular tiles, or planks. Carpet, floor covering, modular tiles, or planks shall be free floating and shall use interlocking means to attach to each other or shall be adhered to the floor and shall be attached with release type adhesives, but shall not be attached to the floor using grout, nails, or screws modular flooring, and planks Submittal Date: Tue Nov 03 10:02:54 PST 2015 Committee Type CMUC under carpet communication wire and cables are permitted to be Statement: installed under carpet with an installation expansion for modular flooring and planks. http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 22/37
The installation instructions for free floating and interlocking does not necessarily apply to all kinds of modular flooring and planks and could be overly restrictive. Public Comment No. 224 NFPA 70 2015 [Section No. 725.135(L)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 23/37
Second Revision No. 622 NFPA 70 2015 [ Section No. 725.135(M) ] (M) One and Two Family Dwellings. The following wires and cables shall be permitted to be installed in one and two family dwellings in locations other than the locations covered in 725.135(B) through (I): (1) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, and PLTC wires and cables (2) Type CL2X wires and cables less than 6 mm ( 1 4 in.) in diameter (3) Type CL3X wires and cables less than 6 mm ( 1 4 in.) in diameter (4) Communications wires and Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, and PLTC cables installed in the following: a. Plenum communications raceways b. Plenum cable routing assemblies c. Riser communications raceways d. Riser cable routing assemblies e. General purpose communications raceways f. General purpose cable routing assemblies (5) Types CL2P, CL3P, CL2R, CL3R, CL2, CL3, CL2X, CL3X, and PLTC wires and cables installed in raceways recognized in Chapter 3 (6) Type CMUC undercarpet communications wires and cables installed under carpet, floor covering, modular tiles, or planks. Carpet, floor covering, modular tiles, or planks shall be free floating and shall use interlocking means to attach to each other or shall be adhered to the floor and shall be attached with release type adhesives, but shall not be attached to the floor using grout, nails, or screws modular flooring, and planks Submittal Date: Tue Nov 03 10:03:55 PST 2015 Committee Type CMUC under carpet communication wire and cables are permitted to be Statement: installed under carpet with an installation expansion for modular flooring and planks. The installation instructions for free floating and interlocking does not necessarily apply to all kinds of modular flooring and planks and could be overly restrictive. http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 24/37
Second Revision No. 614 NFPA 70 2015 [ Part IV. ] 725.170 Listing and Marking of Equipment for Power and Data Transmission. The listed power source for circuits intended to provide power and data over Class 2 cables to remote equipment shall be as specified in 725.121(A)(1), (A)(2), (A)(3), or (A)(4). In accordance with 725.121(B), the power sources shall not have the output connections paralleled or otherwise interconnected, unless listed for such interconnection. Powered devices connected to a circuit supplying data and power shall be listed. Marking of equipment output connections shall be in accordance with 725.121(C). Submittal Date: Tue Nov 03 08:14:41 PST 2015 Committee This new section provides appropriate references to other Sections within Article Statement: 725 that apply to Power and Data Transmission equipment. Marking of the output connections was referred back to 725.121(C) where the marking requirement originates. Public Comment No. 691 NFPA 70 2015 [Part IV.] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 37/37
Public Comment No. 225 NFPA 70 2015 [Section No. 725.135(M)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 25/37
Second Revision No. 611 NFPA 70 2015 [ New Section after 725.143 ] 725.144 Transmission of Power and Data. The requirements of 725.144(A) and (B) shall apply to Class 2 and Class 3 circuits that transmit power and data to a powered device. The requirements of Parts I and III of Article 725 and 300.11 shall apply to Class 2 and Class 3 circuits that transmit power and data. The conductors that carry power for the data circuits shall be copper. The current in the power circuit shall not exceed the current limitation of the connectors. Informational No. 1: One example of the use of cables that transmit power and data is the connection of closed circuit TV cameras (CCTV). Informational Note No. 2: The 8P8C connector is in widespread use with powered communications systems. These connectors are typically rated at 1.3 amperes maximum. Table 725.144 Ampacities of Each Conductor in Amperes in 4 Pair Class 2 or Class 3 Data Cables Based on Copper Conductors at an Ambient Temperature of 30 C (86 F) with all All Conductors in All Cables Carrying Current, 60 C (140 F), 75 C (167 F), and 90 C (194 F) Rated Cables AWG Number of 4 Pair Cables in a Bun 1 2 7 8 19 20 37 Temperature Rating Temperature Rating Temperature Rating Temperature Rating 60 C 75 C 90 C 60 C 75 C 90 C 60 C 75 C 90 C 60 C 75 C 90 C 60 C 26 1 1 1 1 1 1 0.7 0.8 1 0.5 0.6 0.7 0.4 24 2 2 2 1 1.4 1.6 0.8 1 1.1 0.6 0.7 0.9 0.5 23 2.5 2.5 2.5 1.2 1.5 1.7 0.8 1.1 1.2 0.6 0.8 0.9 0.5 22 3 3 3 1.4 1.8 2.1 1 1.2 1.4 0.7 0.9 1.1 0.6 Note 1: For bundle sizes over 192 cables, or for conductor sizes smaller than 26 AWG, ampacities shall be permitted to be determined by qualified personnel under engineering supervision. Note 2: Where only half of the conductors in each cable are carrying current, the values in the table shall be permitted to be increased by a factor of 1.4. Informational Note: The conductor sizes in data cables in wide spread use are typically 22 26 AWG. Te http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 26/37
(A) Use of Class 2 or Class 3 Cables to Transmit Power and Data. Where Types CL3P, CL2P, CL3R, CL2R, CL3, or CL2 transmit power and data, the following shall apply, as applicable: (1) The ampacity ratings in Table 725.144 shall apply at an ambient temperature of 30 C (86 F). (2) For ambient temperatures above 30 C (86 F), the correction factors of 310.15(B) (2) shall apply. Informational Note: One example of the use of Class 2 cables is a network of closed circuit TV cameras using 24 AWG, 60 C rated, Type CL2R, Category 5e local area network (LAN) cables. (B) Use of Class 2 LP or Class 3 LP Cables to Transmit Power and Data. Types CL3P LP, CL2P LP, CL3R LP, CL2R LP, CL3 LP, or CL2 LP shall be permitted to supply power to equipment at a current level up to the marked ampere limit located immediately following the suffix LP and shall be permitted to transmit data to the equipment. The Class 2 LP and Class 3 LP cables shall comply with the following, as applicable: Informational Note 1: The (xxa) following the suffix LP indicates the ampacity of each conductor in a cable. Informational Note 2: An example of a limited power (LP) cable is a cable marked Type CL2 LP(0.5A), 23 AWG. A Type CL2 LP(0.5), 23 AWG could be used in any location where a Type CL2 could be used; however, the LP cable would be suitable for carrying up to 0.5 A per conductor, regardless of the number of cables in a bundle. If used in a 7 cable bundle, the same cable could carry up to 1.2 amperes per conductor. (1) Cables with the suffix LP shall be permitted to be installed in bundles, raceways, cable trays, communications raceways, and cable routing assemblies. (2) Cables with the suffix LP and a marked ampere level shall follow the substitution hierarchy of Table 725.154 and Figure 725.154(A) for the cable type without the suffix LP and without the marked ampere level. (3) System design shall be permitted by qualified persons under engineering supervision. Supplemental Information File Name 725.144_SR611_JS.docx Description For staff use. http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 27/37
Submittal Date: Mon Nov 02 19:37:38 EST 2015 Committee The new section 725.144 and the accompanying table has been added based upon Statement: the Fact Finding Report on Power over Local Area Network type cables with additionally an introduction to new cable type LP that provides the current limitation due to cable bundling and some other installation considerations for power over Ethernet. Public Comment No. 692 NFPA 70 2015 [Section No. 725.143] Public Comment No. 1689 NFPA 70 2015 [Section No. 725.143] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 28/37
Second Revision No. 617 NFPA 70 2015 [ Section No. 760.135(A) ] (A) Listing. PLFA cables installed in buildings shall be listed and labeled. Submittal Date: Tue Nov 03 08:55:04 PST 2015 Committee FR 634 already accepted this text. The panel reaffirms its stance on this topic: By Statement: adding the word "labeled," it will identify that listed products also need to be labeled. Both terms "listed" and "labeled" are defined in Article 100, but are not used consistently throughout the NEC. Public Comment No. 1429 NFPA 70 2015 [Section No. 760.135(A)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 34/37
Second Revision No. 615 NFPA 70 2015 [ Section No. 725.179 ] 725.179 Listing and Marking of Class 2, Class 3, and Type PLTC Cables. Class 2, Class 3, and Type PLTC cables, installed as wiring methods within buildings, shall be listed as resistant to the spread of fire and other criteria in accordance with 725.179(A) through (H I ) and shall be marked in accordance with 725.179(J)725.179(J)725.179(J)725.179(J)725.179(I). (A) Types CL2P and CL3P. Types CL2P and CL3P plenum cable shall be listed as suitable for use in ducts, plenums, and other space for environmental air and shall be listed as having adequate fire resistant and low smoke producing characteristics. Informational Note: One method of defining a cable that is low smoke producing and fire resistant is that the cable exhibits a maximum peak optical density of 0.50 or less, an average optical density of 0.15 or less, and a maximum flame spread distance of 1.52 m (5 ft) or less when tested in accordance with NFPA 262 2015, Standard Method of Test for Flame Travel and Smoke of Wires and Cables for Use in Air Handling Spaces. (B) Types CL2R and CL3R. Types CL2R and CL3R riser cables shall be marked as Type CL2R or CL3R, respectively, and be listed as suitable for use in a vertical run in a shaft or from floor to floor and shall be listed as having fire resistant characteristics capable of preventing the carrying of fire from floor to floor. Informational Note: One method of defining fire resistant characteristics capable of preventing the carrying of fire from floor to floor is that the cables pass the requirements of ANSI/UL 1666 2012, Test for Flame Propagation Height of Electrical and Optical Fiber Cable Installed Vertically in Shafts. (C) Types CL2 and CL3. Types CL2 and CL3 cables shall be marked as Type CL2 or CL3, respectively, and be listed as suitable for general purpose use, with the exception of risers, ducts, plenums, and other space used for environmental air, and shall be listed as resistant to the spread of fire. Informational Note: One method of defining resistant to the spread of fire is that the cables do not spread fire to the top of the tray in the UL flame exposure, vertical tray flame test in ANSI/UL 1685 2010, Standard for Safety for Vertical Tray Fire Propagation and Smoke Release Test for Electrical and Optical Fiber Cables. The smoke measurements in the test method are not applicable. Another method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the CSA vertical flame test for cables in cable trays, as described in CSA C22.2 No. 0.3 M 2001, Test Methods for Electrical Wires and Cables. http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 29/37
(D) Types CL2X and CL3X. Types CL2X and CL3X limited use cables shall be marked as Type CL2X or CL3X, and be listed as suitable for use in dwellings and raceways and shall be listed as resistant to flame spread. Informational Note: One method of determining that cable is resistant to flame spread is by testing the cable to the VW 1 (vertical wire) flame test in ANSI/UL 1581 2011, Reference Standard for Electrical Wires, Cables and Flexible Cords. (E) Type PLTC. Type PLTC nonmetallic sheathed, power limited tray cable shall be listed as being suitable for cable trays and shall consist of a factory assembly of two or more insulated conductors under a nonmetallic jacket. The insulated conductors shall be 22 AWG through 12 AWG. The conductor material shall be copper (solid or stranded). Insulation on conductors shall be rated for 300 volts. The cable core shall be two or more parallel conductors, one or more group assemblies of twisted or parallel conductors, or a combination thereof. A metallic shield or a metallized foil shield with drain wire(s) shall be permitted to be applied over the cable core, over groups of conductors, or both. The cable shall be listed as resistant to the spread of fire. The outer jacket shall be a sunlight and moisture resistant nonmetallic material. Type PLTC cable used in a wet location shall be listed for use in wet locations or have a moisture impervious metal sheath. Exception No. 1: Where a smooth metallic sheath, continuous corrugated metallic sheath, or interlocking tape armor is applied over the nonmetallic jacket, an overall nonmetallic jacket shall not be required. On metallic sheathed cable without an overall nonmetallic jacket, the information required in 310.120 shall be located on the nonmetallic jacket under the sheath. Exception No. 2: Conductors in PLTC cables used for Class 2 thermocouple circuits shall be permitted to be any of the materials used for thermocouple extension wire. Informational Note: One method of defining resistant to the spread of fire is that the cables do not spread fire to the top of the tray in the UL flame exposure, vertical tray flame test in ANSI/UL 1685 2010, Standard for Safety for Vertical Tray Fire Propagation and Smoke Release Test for Electrical and Optical Fiber Cables. The smoke measurements in the test method are not applicable. Another method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the CSA vertical tray flame test for cables in cable trays, as described in CSA C22.2 No. 0.3 M 2001, Test Methods for Electrical Wires and Cables. (F) Circuit Integrity (CI) Cable or Electrical Circuit Protective System. Cables that are used for survivability of critical circuits under fire conditions shall meet either 725.179(F)(1) or (F)(2) as follows: (1) Circuit Integrity (CI) Cables. Circuit Integrity (CI) cables, specified in 725.179(A), (B), (C), and (E), and used for survivability of critical circuits, shall have the additional classification using the suffix CI. Circuit integrity (CI) cables shall only be permitted to be installed in a raceway where specifically listed and marked as part of an electrical circuit protective system as covered in 725.179(F)(2). http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 30/37
(2) Electrical Circuit Protective System. Cables specified in 725.179(A), (B), (C), (E), and (F)(1) that are part of an electrical circuit protective system shall be identified with the protective system number and hourly rating printed on the outer jacket of the cable and installed in accordance with the listing of the protective system. Informational Note No. 1: One method of defining circuit integrity (CI) cable or an electrical circuit protective system is by establishing a minimum 2 hour fireresistive rating when tested in accordance with UL 2196 2012, Standard for Tests of Fire Resistive Cables. Informational Note No. 2: UL guide information for electrical circuit protective systems (FHIT) contains information on proper installation requirements to maintain the fire rating. (G) Class 2 and Class 3 Cable Voltage Ratings. Class 2 cables shall have a voltage rating of not less than 150 volts. Class 3 cables shall have a voltage rating of not less than 300 volts. Class 2 and Class 3 cables shall have a temperature rating of not less than 60 C (140 F). (H) Class 3 Single Conductors. Class 3 single conductors used as other wiring within buildings shall not be smaller than 18 AWG and shall be Type CL3. Conductor types described in 725.49(B) that are also listed as Type CL3 shall be permitted. Informational Note: One method of defining resistant to the spread of fire is that the cables do not spread fire to the top of the tray in the UL flame exposure, vertical tray flame test in ANSI/UL 1685 2010, Standard for Safety for Vertical Tray Fire Propagation and Smoke Release Test for Electrical and Optical Fiber Cables. The smoke measurements in the test method are not applicable. Another method of defining resistant to the spread of fire is for the damage (char length) not to exceed 1.5 m (4 ft 11 in.) when performing the CSA vertical tray flame test for cables in cable trays, as described in CSA C22.2 No. 0.3 M 2001, Test Methods for Electrical Wires and Cables. (I) Limited Power (LP) Cables. Limited power (LP) cables shall be listed as suitable for carrying power and data circuits up to a specified current limit for each conductor without exceeding the temperature rating of the cable where the cable is installed in cable bundles in free air or installed within a raceway, cable tray, or cable routing assembly. The cables shall be marked with the suffix LP with the ampere limit located immediately following the suffix LP, where the current limit is in amperes per conductor. Informational Note: The ampere limit located immediately following the suffix LP is the ampacity of each conductor in a cable. For example, 1 ampere Class 2 limited power cables would be marked CL2 LP (1.0A), CL2R LP (1.0A), or CL2 LP (1.0A). http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 31/37
(J) Marking. Cables shall be marked in accordance with 310.120(A)(2), (A)(3), (A)(4), (A)(5), and Table 725.179(K) Table 725.179(J). Voltage ratings shall not be marked on the cables. Temperature rating shall be marked on the jacket of Class 2 and Class 3 cables that have a temperature rating exceeding 60 C (140 F). Informational Note: Voltage markings on cables may be misinterpreted to suggest that the cables may be suitable for Class 1 electric light and power applications. Exception: Voltage markings shall be permitted where the cable has multiple listings and a voltage marking is required for one or more of the listings. Temperature rating shall be marked on the jacket of Class 2 and Class 3 cables that have a temperature rating exceeding 60 C (140 F). Table 725.179(J) Cable Marking CL3P CL2P CL3R CL2R PLTC CL3 CL2 CL3X CL2X Cable Marking Type Class 3 plenum cable Class 2 plenum cable Class 3 riser cable Class 2 riser cable Power limited tray cable Class 3 cable Class 2 cable Class 3 cable, limited use Class 2 cable, limited use Informational Note: Class 2 and Class 3 cable types are listed in descending order of fire resistance rating, and Class 3 cables are listed above Class 2 cables because Class 3 cables can substitute for Class 2 cables. Submittal Date: Tue Nov 03 08:20:28 PST 2015 : Information on limited power cables is being added to the Code. Public Comment No. 688 NFPA 70 2015 [Section No. 725.179] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 32/37
Second Revision No. 616 NFPA 70 2015 [ Section No. 760.3(B) ] (B) Ducts, Plenums, and Other Air Handling Spaces. Section 300.22, where Power limited and non power limited fire alarm cables installed in ducts or, plenums, or other spaces used for environmental air shall comply with 300.22. Exception No. 1: As permitted in 760.53(B)(1) and (B)(2) and Table 760.154. Power limited fire alarm cables selected in accordance with Table 760.154 and installed in accordance with 760.135(B) and 300.22(B), Exception shall be permitted to be installed in ducts specifically fabricated for environmental air. Exception No. 2: Power limited fire alarm cables selected in accordance with Table 760.154 and installed in accordance with 760.135(C) shall be permitted to be installed in other spaces used for environmental air (plenums). Submittal Date: Tue Nov 03 08:40:41 PST 2015 Committee The existing exception was not in compliance with the NEC Style manual. The Statement: second exception was inserted to deal with power limited fire alarm cables installed in other spaces used for environmental air (plenums). The reference to 300.22(B), Exception was inserted to ensure correlation with the requirements in NFPA 90A. Public Comment No. 454 NFPA 70 2015 [Section No. 760.3(B)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 33/37
Second Revision No. 618 NFPA 70 2015 [ Section No. 760.176 [Excluding any Sub Sections] ] Non power limited fire alarm cables installed as wiring within buildings shall be listed in accordance with 760.176(A) and (B) and as being resistant to the spread of fire in accordance with 760.176(C) through (F), and shall be marked in accordance with 760.176(G). Cable used in a wet location shall be listed for use in wet locations or have a moisture impervious metal sheath. Non power limited fire alarm cables shall have a temperature rating of not less than 60 C (140 F). Submittal Date: Tue Nov 03 08:57:59 PST 2015 Committee Statement: The temperature rating of these cables is required to provide pertinent information so the installer is aware of the temperature limitation of the conductors. Public Comment No. 461 NFPA 70 2015 [Section No. 760.176 [Excluding any Sub Sections]] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 35/37
Second Revision No. 619 NFPA 70 2015 [ Section No. 760.179(C) ] (C) Ratings. The cable shall have a voltage rating of not less than 300 volts. The cable shall have a temperature rating of not less than 60 C (140 F). Submittal Date: Tue Nov 03 08:59:57 PST 2015 Committee Statement: The temperature rating of these cables is required to provide pertinent information so the installer is aware of the temperature limitation of the conductors. Public Comment No. 450 NFPA 70 2015 [Section No. 760.179(C)] http://submittals.nfpa.org/terraviewweb/viewerpage.jsp 36/37