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DRAFTOFPROPOSED NFPA 702011 EditionNational Electrical Code Note: Copies of proposals are published in the NEC ROP forthe 2010 Annual Revision Cycle.The following draft of NFPA 70, National Electrical Code ,2011, incorporates the committee actions on the public andcommittee proposals that make up the A2010 Report on Proposals. The draft is presented only as an aid to the reviewer.NFPA1 BATTERYMARCH PARK, QUINCY, MA 02169-7471Copyright 2009 All Rights Reserved
CONTENTSContentsARTICLEARTICLE90Introduction . 70–9I.II.III.IV.V.VI.VII.VIII.IX.Chapter 1 General100Definitions . 70– 12I. General . 70– 12II. Over 600 Volts, Nominal . 70– 19110Requirements for Electrical Installations . 70– 20General .600 Volts, Nominal, or Less .Over 600 Volts, Nominal .Tunnel Installations over 600 Volts,Nominal .V. Manholes and Other ElectricalEnclosures Intended for PersonnelEntry, All Voltages .I.II.III.IV.70– 2070– 2470– 26I. General .II. System Grounding .III. Grounding Electrode System andGrounding Electrode Conductor .IV. Enclosure, Raceway, and ServiceCable Connections .V. Bonding .VI. Equipment Grounding and EquipmentGrounding Conductors .VII. Methods of Equipment Grounding .VIII. Direct-Current Systems .IX. Instruments, Meters, and Relays .X. Grounding of Systems and Circuits ofOver 1 kV [ROP 5-51a] .70– 30Chapter 2 Wiring and ProtectionUse and Identification of GroundedConductors . 70– 33210Branch Circuits . 70– 35I. General Provisions . 70– 35II. Branch-Circuit Ratings . 70– 39III. Required Outlets . 70– 42215Feeders . 70– 46220Branch-Circuit, Feeder, and ServiceCalculations . 70– 48General .Branch-Circuit Load Calculations .Feeder and Service Load Calculations .Optional Feeder and Service LoadCalculations .V. Farm Load Calculations .I.II.III.IV.22570– 4870– 4870– 51230I. General .II. Overhead Service Conductors [ROP4-75] .III. Underground Service Conductors[ROP 4-92] .IV. Service-Entrance Conductors .V. Service Equipment — General .VI. Service Equipment — DisconnectingMeans .VII. Service Equipment — OvercurrentProtection .VIII. Services Exceeding 600 Volts,Nominal .2852011 EditionNATIONAL ELECTRICAL CODE70– 70–118Surge-Protective Devices (SPDs), 1 kV orLess . 70–121Wiring Methods . 70–124300I. General Requirements . 70–124II. Requirements for over 600 Volts,Nominal . 70–134Conductors for General Wiring . 70–136310I. General . 70–136II. Installation . 70–137III. Construction Specifications . 70–152312Cabinets, Cutout Boxes, and Meter SocketEnclosures . 70–166I. Installation . 70–166II. Construction Specifications . 70–168314Outlet, Device, Pull, and Junction Boxes;Conduit Bodies; Fittings; and HandholeEnclosures . 70–17070– 7370– 7570– 8870– 91Chapter 3 Wiring Methods and Materials70– 6870– 6970– 7170– 7270– 88I. General . 70–121II. Installation . 70–122III. Connecting SPDs. . 70–12270– 6570– 677680838384848586I. General . 70–120II. Installation . 70–121III. Connecting Surge Arresters . 70–121Outside Branch Circuits and Feeders . 70– 58Services . 70– 6570–70–70–70–70–70–70–70–Surge Arresters, Over 1 kV . 70–12028070– 5470– 57I. General . 70– 58II. Buildings or Other Structures Suppliedby a Feeder(s) or Branch Circuit(s)[ROP 4-38] . 70– 61III. Over 600 Volts . 70– 63General .Location. .Enclosures .Disconnecting and Guarding .Plug Fuses, Fuseholders, and Adapters .Cartridge Fuses and Fuseholders .Circuit Breakers .Supervised Industrial Installations .Overcurrent Protection over 600 Volts,Nominal .Grounding and Bonding . 70– 8825070– 30200Overcurrent Protection . 70– 76240I. Scope and General . 70–170II. Installation . 70–170Copyright NFPA70–1
CONTENTSARTICLEARTICLEIII. Construction Specifications . 70–192IV. Pull and Junction Boxes, ConduitBodies, and Handhole Enclosures forUse on Systems over 600 Volts,Nominal [ROP 9-92] . 70–192320Armored Cable: Type AC . 70–194342I. General . 70–210II. Installation . 70–210III. Construction Specifications . 70–211344Flat Cable Assemblies: Type FC . 70–195I. General . 70–195II. Installation . 70–195III. Construction . 70–196324326348Integrated Gas Spacer Cable: Type IGS . 70–198350Medium Voltage Cable: Type MV . 70–199352353332334338Underground Feeder and Branch-CircuitCable: Type UF . 70–209I. General . 70–209II. Installation . 70–209III. Construction Specifications . 70–20970–2Copyright NFPAReinforced Thermosetting Resin Conduit:Type RTRC . 70–221I. General . 70–221II. Installation . 70–222III. Construction Specifications . 70–224356Liquidtight Flexible Nonmetallic Conduit:Type LFNC . 70–224I. General . 70–224II. Installation . 70–224III. Construction Specifications . 70–225358Electrical Metallic Tubing: Type EMT . 70–226I. General . 70–226II. Installation . 70–226III. Construction Specifications . 70–227Service-Entrance Cable: Types SE andUSE . 70–207I. General . 70–207II. Installation . 70–208III. Construction . 70–208340355Power and Control Tray Cable: Type TC . 70–206I. General . 70–206II. Installation . 70–206III. Construction Specifications . 70–207Nonmetallic Underground Conduit withConductors: Type NUCC . 70–220I. General . 70–220II. Installation . 70–220III. Construction Specifications . 70–221Nonmetallic-Sheathed Cable: Types NM,NMC, and NMS . 70–203I. General . 70–203II. Installation . 70–204III. Construction Specifications . 70–206336354Mineral-Insulated, Metal-Sheathed Cable:Type MI . 70–202I. General . 70–202II. Installation . 70–202III. Construction Specifications . 70–203High Density Polyethylene Conduit: TypeHDPE Conduit . 70–219I. General . 70–219II. Installation . 70–219III. Construction Specifications . 70–220Metal-Clad Cable: Type MC . 70–200I. General . 70–200II. Installation . 70–200III. Construction Specifications . 70–202Rigid Polyvinyl Chloride Conduit: TypePVC . 70–216I. General . 70–216II. Installation . 70–216III. Construction Specifications . 70–218I. General . 70–199II. Installation . 70–200III. Construction Specifications . 70–200330Liquidtight Flexible Metal Conduit: TypeLFMC . 70–215I. General . 70–215II. Installation . 70–215III. Construction Specifications . 70–216I. General . 70–198II. Installation . 70–198III. Construction Specifications . 70–199328Flexible Metal Conduit: Type FMC . 70–213I. General . 70–213II. Installation . 70–213Flat Conductor Cable: Type FCC . 70–196I. General . 70–196II. Installation . 70–197III. Construction . 70–198Rigid Metal Conduit: Type RMC . 70–211I. General . 70–211II. Installation . 70–211III. Construction Specifications . 70–213I. General . 70–194II. Installation . 70–194III. Construction Specifications . 70–195322Intermediate Metal Conduit: Type IMC . 70–210360Flexible Metallic Tubing: Type FMT . 70–227I. General . 70–227II. Installation . 70–227III. Construction Specifications . 70–228362Electrical Nonmetallic Tubing: Type ENT . 70–228I. General . 70–228II. Installation . 70–228III. Construction Specifications . 70–230NATIONAL ELECTRICAL CODE2011 Edition
CONTENTSARTICLE366ARTICLEAuxiliary Gutters . 70–216I. General . 70–216II. Installation . 70–216III. Construction Specifications . 70–217368General Requirements .Installation .Construction .Requirements for Over 600 Volts,Nominal .370Cablebus .372Cellular Concrete Floor Raceways .374Cellular Metal Floor Raceways .I. Installation .II. Construction Specifications .Metal Wireways .I. General .II. Installation .III. Construction Specifications .378Nonmetallic Wireways .I. General .II. Installation .III. Construction Specifications .380Multioutlet Assembly .I. General [ROP 8-208] .II. Installation [ROP 8-208] .382Nonmetallic Extensions 22670–22670–22770–22770–227I. General .II. Installation .III. Construction Specifications(Concealable Nonmetallic Extensionsonly) . 70–228384386Surface Metal Raceways . 70–230I. General . 70–230II. Installation . 70–230III. Construction Specifications . 70–231388Surface Nonmetallic Raceways . 70–231I. General . 70–231II. Installation .
The following draft of NFPA 70, National Electrical Code , 2011, incorporates the committee actions on the public and committee proposals that make up the A2010 Report on Pro-
