APPENDIX - L INTERNATIONAL RESIDENTIAL CODE ELECTRICAL

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1 This Appendix (2000 IRC Appendix-L) is produced, copyrighted, and maintained by the National Fire Protection Association Association, all rights reserved. Use of this Appendix is pursuant to license with the NFPA. The title National Electrical Code and the acronym NEC are registered trademarks of the National Fire Protection Association, Quincy, Massachusetts. APPENDIX - L INTERNATIONAL RESIDENTIAL CODE ELECTRICAL This table is a cross reference of the International Residential Code, Chapters 33 through 42, and the 1999 National Electrical Code (NFPA ). IRC Section Section Title NEC Section CHAPTER 33 GENERAL REQUIREMENTS E3301 GENERAL E Applicability None E Scope 90-1 and 90-2 E Not covered 90-2 E Additions and alterations None E3302 BUILDING STRUCTURE PROTECTION E Drilling and notching None E Penetrations of fire-resistance-rated assemblies Section E Penetrations of firestops and draftstops E3303 INSPECTION AND APPROVAL E Approval E Inspection required None E Listing and labeling E3304 GENERAL EQUIPMENT REQUIREMENTS E Voltages E Interrupting rating E Circuit characteristics E Protection of equipment E Unused openings (a) E Integrity of electrical equipment (c) E Mounting (a) E Energized parts guarded against accidental contact (a) E Prevent physical damage (b) E Equipment identification E Identification of disconnecting means

2 E3305 EQUIPMENT LOCATION AND CLEARANCES E Working space and clearances Figure E Working space and clearances Footnote a (f) Footnote b (e) Footnote c (b) Footnote d (a), (d) and (e) Footnote e (d) E Working clearances for energized equipment and panelboards (a), (d), and (f) E Clearances over panelboards (f)(1)(a) E Location of clear spaces (b), (a) and E Access and entrance to working space (c) E Illumination (d) E Headroom (e) E3306 ELECTRICAL CONDUCTORS AND CONNECTIONS E3306 General Article 110, and E Conductor material E Minimum size of conductors E Stranded conductors E Individual conductor insulation 310-2(a) E Conductors in parallel E Conductors of the same circuit 300-3(b) E Aluminum and copper connections E Terminals (a) E Splices (b) E Continuity (a) Exception (a) E Device connections and (b) E Length of conductor for splice or termination E3307 CONDUCTOR AND TERMINAL IDENTIFICATION E Grounded conductors 200-6(a), 200-6(b) and (a) E Equipment grounding conductors and (b) E Ungrounded conductors (c) Exception 200-7(c)(2) E Identification of terminals E Device terminals (a) E Receptacles, plugs, and connectors (b) E Tag marking (b)(3)

3 CHAPTER 34 ELECTRICAL DEFINITIONS E3401 GENERAL Article 100, Definitions Arc-fault circuit-interrupter (a) CHAPTER 35 SERVICES 3501 GENERAL SERVICES E Scope E Number of services E One building or other structure not to be supplied through another E Other conductors in raceway or cable E Raceway seal E Service disconnect required E Marking of service equipment and disconnects & (b) E Service disconnect location (a) & (c) E Maximum number of disconnects (a) E3502 SERVICE SIZE AND RATING E Rating of ungrounded conductors (c) and (d) E Service load Table E Minimum service load calculation Table E Services under 100 amperes None E Rating of service disconnect E Voltage rating (a) E3503 SERVICE, FEEDER AND GROUNDING ELECTRODE CONDUCTOR SIZING E Grounded and ungrounded service conductor size (b)(6) Table E Service conductor and grounding electrode conductor sizing Table and Table Footnote a (e) Footnotes b. and c (b) Footnote d (a) and (b) E Ungrounded service conductors for accessory buildings (b) and structures Exceptions 1,2, and (b) and E Overload protection E Ungrounded conductor (a) Exception E Not in grounded conductor (b) E Grounding electrode conductor size (a), Exception No. 3

4 E3504 OVERHEAD SERVICE-DROP AND SERVICE CONDUCTOR INSTALLATION E Clearance from building openings Figure E Clearances from building openings E Vertical clearances E Above roofs (a) Exception (a), Exception No. 1 Exception (a), Exception No. 2 Exception (a), Exception No. 3 Exception (a), Exception No. 4 Figure E Clearances from roofs E Vertical clearance from grade (b) Items 1, 2, and (b) E Point of attachment E Means of attachment E Service masts as supports E Supports over buildings E3505 SERVICE-ENTRANCE CONDUCTORS E Insulation of service-entrance conductors Exceptions 1 and , Exception E Wiring methods for services E Spliced conductors E Protection against physical damage E Protection of service cables against damage (a) E Mounting supports E Raceways to drain E Overhead service locations E Raintight service head (a) E Service cable, service head or gooseneck (b) E Service head location (c) Exception (c), Exception E Separately bushed openings (e) E Drip loops (f) E Conductor arrangement (g) E Secured (d) E Termination at service equipment E3506 SERVICE EQUIPMENT GENERAL E Service equipment enclosures E Working space E Available short-circuit current None E Marking

5 E3507 SYSTEM GROUNDING E System service ground (b)(1) and (a) E Location of grounding electrode conductor connection (a)(1) and (a)(5) E Two or more buildings or structures supplied from a (a) common service Exception (a), Exception E Equipment grounding conductor (b)(1) and Table E Grounded conductor (b)(2) E Grounding electrode conductor (c) E Main bonding jumper E Common grounding electrode E3508 GROUNDING ELECTRODE SYSTEM E Grounding electrode system E Metal underground water pipe (a) E Concrete-encased electrode (c) E Made and other electrodes E Rod and pipe electrodes (c)(1) and (2) E Installation (c)(2) E Aluminum electrodes Section (e) E Resistance of made electrodes E Metal underground gas piping system (b) E3509 BONDING E General E Bonding of service equipment (a) E Bonding to other systems (b) E Method of bonding at the service E Grounded service conductor (1) E Threaded connections (2) E Threadless couplings and connectors (3) E Other devices (4) E Sizing bonding jumper on supply side of service and main (c) bonding jumper E Metal water piping bonding (a) E Metal gas piping bonding (b) E Bonding other metal piping (c) E3510 GROUNDING ELECTRODE CONDUCTORS E Installation (a) and (b) E Enclosures for grounding electrode conductors (e)

6 E3511 GROUNDING ELECTRODE CONDUCTOR CONNECTION TO GROUNDING ELECTRODES E Methods of grounding connection to electrodes Section E Accessibility Section E Effective grounding path Section E Protection of ground clamps and fittings Section E Clean surfaces Section CHAPTER 36 BRANCH CIRCUIT AND FEEDER REQUIREMENTS E3601 GENERAL E Scope None E Branch-circuit and feeder ampacity Sections (a) and E Multioutlet branch circuits (b) E Multiwire branch circuits Section E3602 BRANCH CIRCUIT RATINGS E Branch-circuit voltage limitations Sections 210-6(a) and (b) E Branch-circuit ampere rating Section E Fifteen- and 20-ampere branch circuits Section (a) E Thirty-ampere branch circuits Section (b) E Branch circuits serving multiple loads or outlets Section (a) E Branch circuits serving a single motor Section (a) E Branch circuits serving motor-operated and combination Section 220-4(a) loads E Branch-circuit inductive lighting loads Section (b), 220-4(b) E Branch-circuit load for ranges and cooking appliances Table , Note 4 E Minimum branch circuit for ranges Section (c) E Branch circuits serving heating loads Sections and 424-3(a) and (b) E Branch circuits for air-conditioning and heat pump equipment Sections and (a)(3) E Branch circuits serving room air conditioners Section (a) E Where no other loads are supplied Section (b) E Where lighting units or other appliances are also supplied Section (c) E Branch-circuit requirement summary Section and Table E Branch-circuit requirement summary Table

7 E3603 REQUIRED BRANCH CIRCUITS E Branch circuits for heating Section E Kitchen and dining area receptacles Section (c)(1) E Laundry circuit Sections (a), Exception and (c)(2) E Bathroom Branch Circuits Section (c)(3) E Number of branch circuits Section (a) E Branch-circuit load proportioning Section (b) E3604 FEEDER REQUIREMENTS E Conductor size Table (b)(6), Sections and (a) E Minimum feeder conductor size 215-2(b) E Feeder loads Table Table E3604.3(1) Feeder load calculation Table , Table (c), Sections , , & Table E3604.3(2) Demand loads for electric ranges, wall-mounted ovens, Table counter-mounted cooking units and other cooking appliances over 13/4 kva rating E Feeder neutral load E Lighting and convenience receptacle load 220-3(a) E Ampacity and computed loads (a) E Feeder and branch-circuit conductors (a) E3605 CONDUCTOR SIZING AND OVERCURRENT PROTECTION E General (a) Table E Allowable ampacities Table E Correction factors for ambient temperatures Table Table E Ambient temperature correction factors Table , Correction factors E Adjustment for conductor proximity (b)(2)(a) Table E Conductor proximity adjustment factors Table (b)(2)(a) E Temperature limitations (c) E Conductors rated 60ºC (c)(1) E Conductors rated 75ºC (c)(2) E Separately installed pressure connectors (c)(3) E Conductors of type NM cable 33630(b) and E Overcurrent protection required Table (b)(6), Sections & E Cords Section E Overcurrent devices of the next higher size 240-3(b) E Small conductors 240-3(d) E Air conditioning and heat pump equipment 240-3(g) E Fuses and fixed trip circuit breakers E Overcurrent device location (e)

8 E3605 CONDUCTOR SIZING AND OVERCURRENT PROTECTION (Cont.) E Location of overcurrent devices in or on premises E Ready access for occupants (b) E Enclosures for overcurrent devices E3606 PANELBOARDS E Panelboard rating E Panelboard circuit identification E Panelboard overcurrent protection (a) CHAPTER 37 WIRING METHODS E3701 GENERAL REQUIREMENTS E Scope E Allowable wiring methods and Table E Allowable wiring methods None E Circuit conductors 300-3(b) E Wiring method applications Chapter 3 and Section Table E Allowable applications for wiring methods Chapter 3 and Section E3702 ABOVEGROUND INSTALLATION REQUIREMENTS E Installation and support requirements Chapter 3 Table E General installation and support requirements for wiring Chapter 3 methods E Cables in accessible attics and 336-6(d) E Across structural members (a) E Cable installed parallel to framing members (b) E Exposed cable and E Surface installation 336-6(a) E Protection from physical damage 336-6(b) E In unfinished basements 336-6(c) E Bends and E3703 UNDERGROUND INSTALLATION REQUIREMENTS E Minimum cover requirements 300-5(a) Table E Minimum cover requirements, burial in inches Table E Grounding 300-5(b) E Protection from damage 300-5(d) E Splices and taps 300-5(e) E Backfill 300-5(f) E Raceway seals 300-5(g) E Bushing 300-5(h) E Single conductors 300-5(i) E Ground movement 300-5(j)

9 CHAPTER 38 POWER AND LIGHTING DISTRIBUTION E3801 RECEPTACLE OUTLETS E General and E Convenience receptacle distribution (a) E Spacing (a)(1) E Wall space (a)(2) E Floor receptacles (a)(3) E Small appliance receptacles (b) E Rooms (b)(1) E No other outlets (b)(2) E Limitations (b)(3) E Countertop receptacles (c) E Wall counter space (c)(1) E Island counter spaces (c)(2) E Peninsular counter space (c)(3) E Separate spaces (c)(4) E Receptacle outlet location (c)(5) E Appliance outlets (c) E Bathroom and toilet room (d) E Outdoor outlets (e) E Laundry areas (f) E Basements and garages (g) E Hallways (h) E HVAC outlet E3802 GROUND-FAULT AND ARC-FAULT CIRCUIT-INTERRUPTER PROTECTION E Bathroom receptacles 210-8(a)(1) E Garage receptacles 210-8(a)(2) E Outdoor receptacles 210-8(a)(3) E Crawl space receptacles 210-8(a)(4) E Unfinished basement receptacles 210-8(a)(5) E Kitchen receptacles 210-8(a)(6) E Bar sink receptacles 210-8(a)(7) E Exempt receptacles 210-8(a)(2) E Bedroom receptacles (as of 2002 IRC Supplement) (b) E3803 LIGHTING OUTLETS E General (a) E Habitable rooms (a)(1) E Additional locations (a)(2) E Storage or equipment spaces (a)(3) E3804 GENERAL INSTALLATION REQUIREMENTS E Electrical continuity of metal raceways and enclosures E Mechanical continuity raceways and cables E Securing and supporting (a) E Raceways as means of support (b) E Raceway installations

10 E3804 GENERAL INSTALLATION REQUIREMENTS E Conduit and tubing fill and Chapter 9, Table 1 Tables E3804.6(1) & E3804.6(10) Maximum number of conductors in conduit or tubing and Chapter 9, Table 1, Note 1 E Air handling stud cavity and joist spaces (c), Exception E3805 BOXES, CONDUIT BODIES, AND FITTINGS E Box, conduit body, or fitting, where required E Equipment (b) E Protection (c) E Integral enclosure (e) E Fitting (f) E Buried conductors (g) E Fixtures (j) E Closed loop (m) E Metal boxes E Nonmetallic boxes E Nonmetallic-sheathed cable and nonmetallic boxes (c) E Securing to box (c) E Conductor rating (c) E Minimum depth of outlet boxes E Boxes enclosing flush-mounted devices E Boxes at lighting fixture outlets (a) E Floor boxes (b) E Boxes at fan outlets (c) E Conduit bodies, junction, pull and outlet boxes to be accessible E Damp or wet locations E Number of conductors in outlet, device, and junction boxes, (a) and conduit boxes E Box volume calculations (a) Table Maximum number of conductors in metal boxes Table (a) E E Standard boxes (a)(1) E Other boxes (a)(2) E Box fill calculations (b) E Conductor fill (b)(1) Table Volume allowance required per conductor Table (b) E E Clamp fill (b)(2) E Support fittings fill (b)(3) E Device or equipment fill (b)(4) E Equipment grounding conductor fill (b)(5) E Conduit bodies (c)

11 E3806 INSTALLATION OF BOXES, CONDUIT BODIES AND FITTINGS E Conductors entering boxes, conduit bodies or fittings E Insulated fittings 300-4(f) E Openings (a) E Metal boxes, conduit bodies and fittings (b) E Unused openings E In wall or ceiling E Plaster, gypsum board and plasterboard E Exposed surface extensions E Supports E Surface mounting (a) E Structural mounting (b) E Nails (b)(1) E Braces (b)(2) E Mounting in finished surfaces (c) E Raceway supported enclosures without devices or fixtures (e) E Raceway supported enclosures, with devices or fixtures (f) E Enclosures in concrete or masonry (f) E Covers and canopies E Metal covers and plates (a) E Exposed combustible finish (b) E3807 CABINETS AND PANELBOARDS E Damp or wet locations 373-2(a) E Position in wall E Unused openings E Conductors entering cabinets 300-3(f) and E Openings to be closed 373-5(a) E Cables 373-5(c) E3808 GROUNDING E Metal enclosures E Equipment fastened in place or connected by permanent wiring methods (fixed) E Specific equipment fastened in place or connected by permanent wiring methods E Performance of fault current path 250-2(d) E Earth as a grounding conductor 250-2(d) E Load-side neutral E Load-side equipment E Types of equipment grounding conductors E Flexible metal conduit (6) E Liquidtight flexible metal conduit (7) E Nonmetallic sheathed cable (Type NM) (b) E Equipment fastened in place or connected by permanent wiring methods E Methods of equipment grounding 250 Part G E Equipment grounding conductor installation E Equipment grounding conductor size Table E Equipment grounding conductor sizing Table

12 E3808 GROUNDING (Cont.) E Multiple circuits (c) E Continuity and attachment of branch-circuit equipment grounding conductors to boxes E Connecting receptacle grounding terminal to box E Metal boxes (a) E Nonmetallic boxes (b)) E Clean surfaces E Bonding other enclosures (a) E Size of equipment bonding jumper on load side of service (d) E Installation equipment bonding jumper (e) E3809 FLEXIBLE CORDS E Where permitted and E Loading and protection Table E Maximum ampere load and overcurrent-protection-device rating for flexible cords and Table 400-5(A) E Splices E Attachment plugs 400-7(b) CHAPTER 39 DEVICES AND LIGHTING FIXTURES E3901 SWITCHES E Rating and application of snap switches (a) E CO/ALR snap switches (c) E Indicating E Time switches and similar devices E Grounding of enclosures E Access E Wet locations E Grounded conductors 380-2(b) E Switch connections 380-2(a) E Box mounted (b) E Snap switch faceplates 380-9(a) E Faceplate grounding 380-9(b) E3902 RECEPTACLES E Rating and type (a) E Single receptacle (b)(1) E Two or more receptacles (b)(3) Table E Receptacle ratings for various size multioutlet circuits E Grounding type 210-7(a) E CO/ALR receptacles (b) E Faceplates (d) E Position of receptacle faces (e) E Receptacles mounted in boxes (f)(1) and (2) E Receptacles mounted on covers (f)(3) E Damp locations (a) E Wet locations (b) E Bathtub and shower space (c)

13 E3902 RECEPTACLES (cont.) E Flush mounting with faceplate (e) E Outdoor installation (f) E3903 FIXTURES E Energized parts E Fixtures near combustible material E Exposed conductive parts (a) E Screw-shell type E Recessed incandescent fixtures (c) E Thermal protection (e) E High-intensity discharge fixtures (f) E Wet or damp locations 410-4(a) E Lampholders in wet or damp locations E Pendants 410-4(d) E Fixtures in clothes closets 410-8(a) Figure E Closet storage space Figure E Fixture wiring general E Polarization of fixtures E Fixtures as raceways E3904 FIXTURE INSTALLATION E Outlet box covers E Combustible material at outlet boxes E Access (b) E Supports (a) E Means of support (a) E Exposed ballasts (a) E Combustible low-density cellulose fiberboard (b) E Recessed fixture clearance (a) E Recessed fixture installation (b) E3905 TRACK LIGHTING E Fastening E Grounding (b) CHAPTER 40 APPLIANCE INSTALLATION E4001 GENERAL E Scope and E Installation 110-3(b) and E Flexible cords Table E Flexible cord length (b)(1) and (2) E Overcurrent protection E Single motor operated appliance (e) E Disconnecting means and Table E Disconnecting means , , , , and E Ceiling fans

14 E4001 GENERAL (Cont.) E Snow-melting and deicing equipment protection 210-8(a)(3) Exception and CHAPTER 41 SWIMMING POOLS E4101 GENERAL E Scope E Definitions E4102 WIRING METHODS FOR POOLS, SPAS, HOT TUBS AND HYDROMASSAGE BATHTUBS E General 608-7, (b), (c), (b), (c), (d), and E Flexible cords 680-6(b)(3), 680-7, Exception No. 2, Exception, (b)(3) E4103 EQUIPMENT LOCATION AND CLEARANCES E Receptacle outlets 680-6(a) E Location 680-6(a)(1) E Where required 680-6(a)(2) E GFCI Protection 680-6(a)(3) E Indoor Locations (a)(1) E Indoor GFCI Protection (a)(2), E Switching devices 680-6(c), (c), E Disconnecting means E Lighting fixtures and ceiling fans 680-6(b) E Outdoor Location 680-6(b)(1) E Indoor location 680-6(b)(3) E Existing lighting outlets and fixtures 680-6(b)(2) E Indoor spas and hot tubs (b) E GFCI Protection 680-6(b)(4) E Overhead conductor clearances Table E Overhead conductor clearances Table Figure E Overhead conductor clearances Figure E Underground Wiring Table E Minimum burial depths

15 E4104 BONDING E Bonded Parts Sections (a), (b) and (d)(4) E Parts not required to be bonded (a) Exception No. 2, (a) Exception No. 4, Exception No.1 and (d)(4) Exception E Methods of bonding (b), Exception 3 and (e) E4105 GROUNDING E Equipment to be grounded E Light Fixtures (b)(1), (b)(2), (b)(3) E Nonmetallic conduit (b)(1) E Flexible cords (b)(3) E Motors (c) E Panelboards (d) E Cord-connected equipment (e) E Other equipment (f) E4106 EQUIPMENT INSTALLATION E Transformers 680-5(a) E Ground-fault circuit-interrupters 680-5(b) E Wiring on load side of ground-fault circuit-interrupters and 680-5(c) transformers E Underwater lighting fixtures (a)(1) E Maximum voltage (a)(2) E Fixture location 680(a)(3) E Wet-niche fixtures (b)(1), (b)(3) E Dry-niche fixtures (c) E No-niche fixtures (d) E Junction boxes and enclosures for transformers or groundfault circuit interrupters E Junction boxes (a) E Other enclosures (b) E Protection of junction boxes and enclosures (c) E Grounding terminals (d) E Strain relief (e) E Underwater audio equipment E Speakers (a) E Wiring methods (b) E Forming shell and metal screen (c) E Electrically operated pool covers E Electric pool water heaters E Pool area heating

16 E4106 EQUIPMENT INSTALLATION (Cont.) E Unit heaters (a) E Permanently wired radiant heaters (b) E Radiant heating cables prohibited (c) E Double insulated pool pumps E4107 STORABLE SWIMMING POOLS E Pumps E Ground-fault circuit-interrupters required E Lighting fixtures E volts or less (a) E Not over 150 volts (b) E4108 SPAS AND HOT TUBS E Ground-fault circuit-interrupters E Electric water heaters (h) E Underwater audio equipment (i) E4109 HYDROMASSAGE BATHTUBS E Ground-fault circuit-interrupters E Other electric equipment E Accessibility E Bonding CHAPTER 42 CLASS 2 REMOTE CONTROL, SIGNALING, AND POWER-LIMITED CIRCUITS E4201 GENERAL E Scope E Definitions Article 100 and Section E4202 POWER SOURCES E Power Sources for Class 2 circuits (a) E Interconnection of power sources (b) E4203 WIRING METHODS E Wiring methods on supply side of Class 2 power source E Wiring methods and materials on load side of the Class , , power source E Type CL2P cables (a) E Type CL2 Cables (c) E Type CL2X Cables (e), Exception 4 and (d) E Marking (h)

17 E4204 INSTALLATION REQUIREMENTS E Separation from other conductors (a)(1) E Other applications (a)(3) E Class 2 circuits with communication circuits (b)(4) E Class 2 Cables with other circuit cables (b)(5) E Installation of conductors and cables 725-5, 725-7, (d)