Permanently installed electric baseboard heaters equipped with factory-installed receptacle outlets, or outlets provided as a separate assembly by the baseboard manufacturer shall be permitted as the required outlet or outlets for the wall space utilized by such permanently installed heaters. Such receptacle outlets shall not be connected to the heater circuits.
FIGURE E3901.2
GENERAL USE RECEPTACLE DISTRIBUTION
Exceptions:
FIGURE E3901.4
COUNTERTOP RECEPTACLES
Exception: Receptacle outlets shall not be required on a wall directly behind a range, counter-mounted cooking unit or sink in the installation described in Figure E3901.4.1.
FIGURE E3901.4.1
DETERMINATION OF AREA BEHIND SINK OR RANGE
Exception: Receptacle outlets shall be permitted to be mounted not more than 12 inches (305 mm) below the countertop in construction designed for the physically impaired and for island and peninsular countertops where the countertop is flat across its entire surface and there are no means to mount a receptacle within 20 inches (508 mm) above the countertop, such as in an overhead cabinet. Receptacles mounted below the countertop in accordance with this exception shall not be located where the countertop extends more than 6 inches (152 mm) beyond its support base.
Receptacle outlets shall not be installed in a face-up position in the work surfaces or countertops in a bathroom basin location. Receptacle outlet assemblies installed in countertops shall be listed for the application.
At least one receptacle outlet, in addition to any provided for specific equipment, shall be installed in each basement and in each attached garage, and in each detached garage or accessory building that is provided with electrical power. Where a portion of the basement is finished into one or more habitable room(s), each separate unfinished portion shall have a receptacle outlet installed in accordance with this section.
TABLE E3904.6(1)
MAXIMUM NUMBER OF CONDUCTORS IN ELECTRICAL METALLIC TUBING (EMT)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 4 3 2 1 1 1 1 1 0 0 0 0 0 | 7 6 5 2 1 1 1 1 1 1 1 0 0 | 11 9 8 4 3 2 1 1 1 1 1 1 1 | 20 17 13 7 5 4 4 3 1 1 1 1 1 | 27 23 18 9 8 6 5 4 3 2 2 1 1 | 46 38 30 16 13 10 9 7 5 4 4 3 3 |
TW | 14 12 10 8 | 8 6 5 2 | 15 11 8 5 | 25 19 14 8 | 43 33 24 13 | 58 45 33 18 | 96 74 55 30 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 6 4 3 1 | 10 8 6 4 | 16 13 10 6 | 28 23 18 10 | 39 31 24 14 | 64 51 40 24 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 1 0 0 0 0 | 3 1 1 1 1 1 1 1 0 | 4 3 3 2 1 1 1 1 1 | 8 6 5 4 3 2 1 1 1 | 11 8 7 6 4 3 3 2 1 | 18 13 12 10 7 6 5 4 3 |
THHN, THWN, THWN-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 12 9 5 3 2 1 1 1 1 1 0 0 0 | 22 16 10 6 4 2 1 1 1 1 1 1 1 | 35 26 16 9 7 4 3 3 1 1 1 1 1 | 61 45 28 16 12 7 6 5 4 3 2 1 1 | 84 61 38 22 16 10 8 7 5 4 3 3 2 | 138 101 63 36 26 16 13 11 8 7 6 5 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 8 6 5 2 1 1 1 1 1 1 0 0 0 | 15 11 8 5 3 2 1 1 1 1 1 1 1 | 25 19 14 8 6 4 3 3 1 1 1 1 1 | 43 33 24 13 10 7 6 5 4 3 2 1 1 | 58 45 33 18 14 10 8 7 5 4 3 3 2 | 96 74 55 30 22 16 14 11 8 7 6 5 4 |
TABLE E3904.6(2)
MAXIMUM NUMBER OF CONDUCTORS IN ELECTRICAL NONMETALLIC TUBING (ENT)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 | 3 2 1 1 1 1 1 0 0 0 0 | 6 5 4 1 1 1 1 1 1 0 0 | 10 9 7 3 3 2 1 1 1 1 1 | 19 16 13 6 5 4 3 3 1 1 1 | 26 22 17 9 7 6 5 4 3 2 1 | 43 36 29 15 12 9 8 7 5 4 3 |
RHW, RHW-2 | 3/0 4/0 | 0 0 | 0 0 | 1 1 | 1 1 | 1 1 | 3 2 |
TW | 14 12 10 8 | 7 5 4 1 | 13 10 7 4 | 22 17 13 7 | 40 31 23 13 | 55 42 32 17 | 92 71 52 29 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 4 3 3 1 | 8 7 5 3 | 15 12 9 5 | 27 21 17 10 | 37 29 23 14 | 61 49 38 23 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 0 0 0 0 0 | 2 1 1 1 1 1 1 0 0 | 4 3 2 2 1 1 1 1 1 | 7 5 5 4 3 2 1 1 1 | 10 8 7 6 4 3 3 2 1 | 17 13 11 9 6 5 5 4 3 |
THHN, THWN, THWN-2 | 14 12 10 8 6 4 3 2 | 10 7 4 2 1 1 1 1 | 18 13 8 5 3 1 1 1 | 32 23 15 8 6 4 3 2 | 58 42 26 15 11 7 5 5 | 80 58 36 21 15 9 8 6 | 132 96 60 35 25 15 13 11 |
THHN, THWN, THWN-2 | 1 1/0 2/0 3/0 4/0 | 1 0 0 0 0 | 1 1 1 1 0 | 1 1 1 1 1 | 3 3 2 1 1 | 5 4 3 3 2 | 8 7 5 4 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 7 5 4 1 1 1 1 1 1 0 0 0 0 | 13 10 7 4 3 1 1 1 1 1 1 1 0 | 22 17 13 7 5 4 3 2 1 1 1 1 1 | 40 31 23 13 9 7 6 5 3 3 2 1 1 | 55 42 32 17 13 9 8 6 5 4 3 3 2 | 92 71 52 29 21 15 13 11 8 7 6 5 4 |
TABLE E3904.6(3)
MAXIMUM NUMBER OF CONDUCTORS IN FLEXIBLE METALLIC CONDUIT (FMC)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 | 4 3 3 1 1 1 1 | 7 6 5 2 1 1 1 | 11 9 7 4 3 2 1 | 17 14 11 6 5 4 3 | 25 21 17 9 7 5 5 | 44 37 30 15 12 10 7 |
RHW, RHW-2 | 2 1 1/0 2/0 3/0 | 1 0 0 0 0 | 1 1 1 1 0 | 1 1 1 1 1 | 3 1 1 1 1 | 4 2 2 1 1 | 7 5 4 3 3 |
TW | 14 12 10 8 | 9 7 5 3 | 15 11 8 5 | 23 18 13 7 | 36 28 21 11 | 53 41 30 17 | 94 72 54 30 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 6 5 4 1 | 10 8 6 4 | 15 12 10 6 | 24 19 15 9 | 35 28 22 13 | 62 50 39 23 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 4/0 | 1 1 1 1 1 0 0 0 0 0 | 3 1 1 1 1 1 1 1 0 0 | 4 3 3 2 1 1 1 1 1 1 | 7 5 4 4 2 1 1 1 1 1 | 10 7 6 5 4 3 3 2 1 1 | 18 13 11 10 7 6 5 4 3 2 |
THHN, THWN, THWN-2 | 14 12 10 8 | 13 9 6 3 | 22 16 10 6 | 33 24 15 9 | 52 38 24 14 | 76 56 35 20 | 134 98 62 35 |
THHN, THWN, THWN-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 2 1 1 1 1 1 0 0 0 | 4 2 1 1 1 1 1 1 1 | 6 4 3 3 1 1 1 1 1 | 10 6 5 4 3 2 1 1 1 | 14 9 7 6 4 4 3 2 1 | 25 16 13 11 8 7 6 5 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 9 7 5 3 1 1 1 1 1 1 0 0 0 | 15 11 8 5 3 2 1 1 1 1 1 1 1 | 23 18 13 7 5 4 3 3 1 1 1 1 1 | 36 28 21 11 8 6 5 4 3 2 2 1 1 | 53 41 30 17 12 9 7 6 5 4 3 3 2 | 94 72 54 30 22 16 13 11 8 7 6 5 4 |
TABLE E3904.6(4)
MAXIMUM NUMBER OF CONDUCTORS IN INTERMEDIATE METALLIC CONDUIT (IMC)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 4 4 3 1 1 1 1 1 0 0 0 0 0 | 8 6 5 3 1 1 1 1 1 1 1 0 0 | 13 11 8 4 3 3 2 1 1 1 1 1 1 | 22 18 15 8 6 5 4 3 2 1 1 1 1 | 30 25 20 10 8 6 6 5 3 3 2 1 1 | 49 41 33 17 14 11 9 8 5 4 4 3 3 |
TW | 14 12 10 8 | 10 7 5 3 | 17 13 9 5 | 27 21 15 8 | 47 36 27 15 | 64 49 36 20 | 104 80 59 33 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 6 5 4 2 | 11 9 7 4 | 18 14 11 7 | 31 25 19 12 | 42 34 26 16 | 69 56 43 26 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 1 1 0 0 0 | 3 2 1 1 1 1 1 1 1 | 5 4 3 3 1 1 1 1 1 | 9 6 6 5 3 3 2 1 1 | 12 9 8 6 4 4 3 3 2 | 20 15 13 11 7 6 5 4 4 |
THHN, THWN, THWN-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 | 14 10 6 3 2 1 1 1 1 1 1 | 24 17 11 6 4 3 2 1 1 1 1 | 39 29 18 10 7 4 4 3 2 1 1 | 68 49 31 18 13 8 6 5 4 3 3 | 91 67 42 24 17 10 9 7 5 4 4 | 149 109 68 39 28 17 15 12 9 8 6 |
THHN, THWN, THWN-2 | 3/0 2/0 | 0 0 | 1 1 | 1 1 | 2 1 | 3 2 | 5 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 10 7 5 3 1 1 1 1 1 1 1 0 0 | 17 13 9 5 4 3 2 1 1 1 1 1 1 | 27 21 15 8 6 4 4 3 2 1 1 1 1 | 47 36 27 15 11 8 7 5 4 3 3 2 1 | 64 49 36 20 15 11 9 7 5 5 4 3 2 | 104 80 59 33 24 18 15 12 9 8 6 5 4 |
TABLE E3904.6(5)
MAXIMUM NUMBER OF CONDUCTORS IN LIQUID-TIGHT FLEXIBLE NONMETALLIC CONDUIT (FNMC-B)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | ||||||
3/8 | 1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 | 2 1 1 1 1 0 | 4 3 3 1 1 1 | 7 6 5 2 1 1 | 12 10 8 4 3 2 | 21 17 14 7 6 4 | 27 22 18 9 7 6 | 44 36 29 1 12 9 |
RHW, RHW-2 | 3 2 1 1/0 2/0 3/0 4/0 | 0 0 0 0 0 0 0 | 1 1 0 0 0 0 0 | 1 1 1 1 1 0 0 | 1 1 1 1 1 1 1 | 4 3 1 1 1 1 1 | 5 4 3 2 1 1 1 | 8 7 5 4 3 3 2 |
TW | 14 12 10 8 | 5 4 3 1 | 9 7 5 3 | 15 12 9 5 | 25 19 14 8 | 44 33 25 14 | 57 43 32 18 | 93 71 53 29 |
RHWa, RGW-2a, THHW, THW, THW-2 | 14 12 10 8 | 3 3 1 1 | 6 5 3 1 | 10 8 6 4 | 16 13 10 6 | 29 23 18 11 | 38 30 23 14 | 62 50 39 23 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 0 0 0 0 0 0 | 1 1 1 1 1 0 0 0 0 | 3 1 1 1 1 1 1 1 0 | 5 3 3 2 1 1 1 1 1 | 8 6 5 4 3 2 2 1 1 | 11 8 7 6 4 3 3 2 1 | 18 13 11 9 7 6 5 4 3 |
THHN, THWN, THWN-2 | 14 12 10 8 | 8 5 3 1 | 13 9 6 3 | 22 16 10 6 | 36 26 16 9 | 63 46 29 16 | 81 59 37 21 | 133 97 61 35 |
THHN, THWN, THWN-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 0 0 0 0 0 | 2 1 1 1 1 1 0 0 0 | 4 2 1 1 1 1 1 1 1 | 7 4 3 3 1 1 1 1 1 | 12 7 6 5 4 3 2 1 1 | 15 9 8 7 5 4 3 3 2 | 25 15 13 11 8 7 6 5 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 5 4 3 1 1 1 1 1 0 0 0 0 0 | 9 7 5 3 1 1 1 1 1 1 0 0 0 | 15 12 9 5 3 2 1 1 1 1 1 1 1 | 25 19 14 8 6 4 3 3 1 1 1 1 1 | 44 33 25 14 10 7 6 5 4 3 2 1 1 | 57 43 32 18 13 9 8 7 5 4 3 3 2 | 93 71 53 29 22 16 13 11 8 7 6 5 4 |
TABLE E3904.6(6)
MAXIMUM NUMBER OF CONDUCTORS IN LIQUID-TIGHT FLEXIBLE NONMETALLIC CONDUIT (FNMC-A)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | ||||||
3/8 | 1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 2 1 1 1 1 0 0 0 0 0 0 0 0 | 4 3 3 1 1 1 1 1 0 0 0 0 0 | 7 6 5 2 1 1 1 1 1 1 1 0 0 | 11 9 8 4 3 2 1 1 1 1 1 1 1 | 20 17 13 7 5 4 4 3 1 1 1 1 1 | 27 23 18 9 7 6 5 4 3 2 1 1 1 | 45 38 30 16 13 10 8 7 5 4 4 3 3 |
TW | 14 12 10 8 | 5 4 3 1 | 9 7 5 3 | 15 12 9 5 | 24 19 14 8 | 43 33 24 13 | 58 44 33 18 | 96 74 55 30 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 3 3 1 1 | 6 4 3 1 | 10 8 6 4 | 16 13 10 6 | 28 23 18 10 | 38 31 24 14 | 64 51 40 24 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 | 1 1 1 0 0 | 1 1 1 1 1 | 3 1 1 1 1 | 4 3 3 2 1 | 8 6 5 4 3 | 11 8 7 6 4 | 18 13 11 10 7 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 1/0 2/0 3/0 4/0 | 0 0 0 0 | 0 0 0 0 | 1 1 1 0 | 1 1 1 1 | 2 1 1 1 | 3 3 2 1 | 6 5 4 3 |
THHN, THWN, THWN-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 8 5 3 1 1 1 1 1 0 0 0 0 0 | 13 9 6 3 2 1 1 1 1 1 0 0 0 | 22 16 10 6 4 2 1 1 1 1 1 1 1 | 35 25 16 9 6 4 3 3 1 1 1 1 1 | 62 45 28 16 12 7 6 5 4 3 2 1 1 | 83 60 38 22 16 9 8 7 5 4 3 3 2 | 137 100 63 36 26 16 13 11 8 7 6 5 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 | 5 4 3 1 1 1 1 1 0 | 9 7 5 3 1 1 1 1 1 | 15 12 9 5 3 2 1 1 1 | 24 19 14 8 5 4 3 3 1 | 43 33 24 13 10 7 6 5 4 | 58 44 33 18 13 10 8 7 5 | 96 74 55 30 22 16 14 11 8 |
XHHW, XHHW-2 | 1/0 2/0 3/0 4/0 | 0 0 0 0 | 1 0 0 0 | 1 1 1 1 | 1 1 1 1 | 3 2 1 1 | 4 3 3 2 | 7 6 5 4 |
TABLE E3904.6(7)
MAXIMUM NUMBER OF CONDUCTORS IN LIQUID-TIGHT FLEXIBLE METAL CONDUIT (LFMC)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 4 3 3 1 1 1 1 1 0 0 0 0 0 | 7 6 5 2 1 1 1 1 1 1 1 0 0 | 12 10 8 4 3 2 1 1 1 1 1 1 1 | 21 17 14 7 6 4 4 3 1 1 1 1 1 | 27 22 18 9 7 6 5 4 3 2 1 1 1 | 44 36 29 15 12 9 8 7 5 4 3 3 2 |
TW | 14 12 10 8 | 9 7 5 3 | 15 12 9 5 | 25 19 14 8 | 44 33 25 14 | 57 43 32 18 | 93 71 53 29 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 6 5 3 1 | 10 8 6 4 | 16 13 10 6 | 29 23 18 11 | 38 30 23 14 | 62 50 39 23 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 1 0 0 0 0 | 3 1 1 1 1 1 1 1 0 | 5 3 3 2 1 1 1 1 1 | 8 6 5 4 3 2 2 1 1 | 11 8 7 6 4 3 3 2 1 | 18 13 11 9 7 6 5 4 3 |
THHN, THWN, THWN-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 13 9 6 3 2 1 1 1 1 1 0 0 0 | 22 16 10 6 4 2 1 1 1 1 1 1 1 | 36 26 16 9 7 4 3 3 1 1 1 1 1 | 63 46 29 16 12 7 6 5 4 3 2 1 1 | 81 59 37 21 15 9 8 7 5 4 3 3 2 | 133 97 61 35 25 15 13 11 8 7 6 5 4 |
XHHW, XHHW-2 | 14 12 10 8 | 9 7 5 3 | 15 12 9 5 | 25 19 14 8 | 44 33 25 14 | 57 43 32 18 | 93 71 53 29 |
XHHW, XHHW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 1 1 0 0 0 | 3 2 1 1 1 1 1 1 1 | 6 4 3 3 1 1 1 1 1 | 10 7 6 5 4 3 2 1 1 | 13 9 8 7 5 4 3 3 2 | 22 16 13 11 8 7 6 5 4 |
TABLE E3904.6(8)
MAXIMUM NUMBER OF CONDUCTORS IN RIGID METAL CONDUIT (RMC)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 4 3 3 1 1 1 1 1 0 0 0 0 0 | 7 6 5 2 1 1 1 1 1 1 1 0 0 | 12 10 8 4 3 2 2 1 1 1 1 1 1 | 21 17 14 7 6 4 4 3 1 1 1 1 1 | 28 23 19 10 8 6 5 4 3 2 2 1 1 | 46 38 31 16 13 10 9 7 5 4 4 3 3 |
TW | 14 12 10 8 | 9 7 5 3 | 15 12 9 5 | 25 19 14 8 | 44 33 25 14 | 59 45 34 19 | 98 75 56 31 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 6 5 3 1 | 10 8 6 4 | 17 13 10 6 | 29 23 18 11 | 39 32 25 15 | 65 52 41 24 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 1 0 0 0 0 | 3 1 1 1 1 1 1 1 0 | 5 3 3 2 1 1 1 1 1 | 8 6 5 4 3 2 2 1 1 | 11 8 7 6 4 3 3 2 1 | 18 14 12 10 7 6 5 4 3 |
THHN, THWN, THWN-2 | 14 12 10 8 6 4 3 2 1 | 13 9 6 3 2 1 1 1 1 | 22 16 10 6 4 2 1 1 1 | 36 26 17 9 7 4 3 3 1 | 63 46 29 16 12 7 6 5 4 | 85 62 39 22 16 10 8 7 5 | 140 102 64 37 27 16 14 11 8 |
THHN, THWN, THWN-2 | 1/0 2/0 3/0 4/0 | 1 0 0 0 | 1 1 1 1 | 1 1 1 1 | 3 2 1 1 | 4 3 3 2 | 7 6 5 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 9 7 5 3 1 1 1 1 1 1 0 0 0 | 15 12 9 5 3 2 1 1 1 1 1 1 1 | 25 19 14 8 6 4 3 3 1 1 1 1 1 | 44 33 25 14 10 7 6 5 4 3 2 1 1 | 59 45 34 19 14 10 8 7 5 4 3 3 2 | 98 75 56 31 23 16 14 12 9 7 6 5 4 |
TABLE E3904.6(9)
MAXIMUM NUMBER OF CONDUCTORS IN RIGID PVC CONDUIT, SCHEDULE 80 (PVC-80)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 | 3 2 1 1 1 1 | 5 4 3 1 1 1 | 9 7 6 3 2 1 | 17 14 11 6 4 3 | 23 19 15 8 6 5 | 39 32 26 13 11 8 |
RHW, RHW-2 | 3 2 1 1/0 2/0 3/0 4/0 | 0 0 0 0 0 0 0 | 1 1 1 0 0 0 0 | 1 1 1 1 1 1 0 | 3 3 1 1 1 1 1 | 4 4 2 1 1 1 1 | 7 6 4 3 3 3 2 |
TW | 14 12 10 8 | 6 5 3 1 | 11 9 6 3 | 20 15 11 6 | 35 27 20 11 | 49 38 28 15 | 82 63 47 26 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 4 3 2 1 | 8 6 5 3 | 13 10 8 5 | 23 19 15 9 | 32 26 20 12 | 55 44 34 20 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 | 1 1 1 1 0 0 | 1 1 1 1 1 1 | 3 3 2 1 1 1 | 7 5 4 3 2 1 | 9 7 6 5 3 3 | 16 12 10 8 6 5 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 2/0 3/0 4/0 | 0 0 0 | 1 0 0 | 1 1 1 | 1 1 1 | 2 1 1 | 4 3 3 |
THHN, THWN, THWN-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 9 6 4 2 1 1 1 1 0 0 0 0 0 | 17 12 7 4 3 1 1 1 1 1 1 1 0 | 28 20 13 7 5 3 3 2 1 1 1 1 1 | 51 37 23 13 9 6 5 4 3 2 1 1 1 | 70 51 32 18 13 8 7 6 4 3 3 2 1 | 118 86 54 31 22 14 12 10 7 6 5 4 3 |
XHHW, XHHW-2 | 14 12 10 8 6 | 6 5 3 1 1 | 11 9 6 3 2 | 20 15 11 6 4 | 35 27 20 118 | 49 38 28 15 11 | 82 63 47 26 19 |
(continued)
TABLE E3904.6(9)—continued
MAXIMUM NUMBER OF CONDUCTORS IN RIGID PVC CONDUIT, SCHEDULE 80 (PVC-80)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 6 5 3 1 1 1 1 1 0 0 0 0 0 | 11 9 6 3 2 1 1 1 1 1 1 1 0 | 20 15 11 6 4 3 3 2 1 1 1 1 1 | 35 27 20 11 8 6 5 4 3 2 1 1 1 | 49 38 28 15 11 8 7 6 4 3 3 2 1 | 82 63 47 26 19 14 12 10 7 6 5 4 3 |
TABLE E3904.6(10)
MAXIMUM NUMBER OF CONDUCTORS IN RIGID PVC CONDUIT SCHEDULE 40 (PVC-40)a
TYPE LETTERS | CONDUCTOR SIZE AWG/kcmil | TRADE SIZES (inches) | |||||
1/2 | 3/4 | 1 | 11/4 | 11/2 | 2 | ||
RHW, RHW-2 | 14 12 10 8 6 4 3 2 | 4 3 2 1 1 1 1 1 | 7 5 4 2 1 1 1 1 | 11 9 7 4 3 2 1 1 | 20 16 13 7 5 4 4 3 | 27 22 18 9 7 6 5 4 | 45 37 30 15 12 10 8 7 |
RHW, RHW-2 | 1 1/0 2/0 3/0 4/0 | 0 0 0 0 0 | 1 1 0 0 0 | 1 1 1 1 1 | 1 1 1 1 1 | 3 2 1 1 1 | 5 4 3 3 2 |
TW | 14 12 10 8 | 8 6 4 2 | 14 11 8 4 | 24 18 13 7 | 42 32 24 13 | 57 44 32 18 | 94 72 54 30 |
RHWa, RHW-2a, THHW, THW, THW-2 | 14 12 10 8 | 5 4 3 1 | 9 8 6 3 | 16 12 10 6 | 28 22 17 10 | 38 30 24 14 | 63 50 39 23 |
RHWa, RHW-2a, TW, THW, THHW, THW-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 0 0 0 0 0 | 2 1 1 1 1 1 1 1 0 | 4 3 3 2 1 1 1 1 1 | 8 6 5 4 3 2 1 1 1 | 11 8 7 6 4 3 3 2 1 | 18 13 11 10 7 6 5 4 3 |
THHN, THWN, THWN-2 | 14 12 10 8 | 11 8 5 3 | 21 15 9 5 | 34 25 15 9 | 60 43 27 16 | 82 59 37 21 | 135 99 62 36 |
THHN, THWN, THWN-2 | 6 4 3 2 1 1/0 2/0 3/0 4/0 | 1 1 1 1 1 1 0 0 0 | 4 2 1 1 1 1 1 1 1 | 6 4 3 3 1 1 1 1 1 | 11 7 6 5 3 3 2 1 1 | 15 9 8 7 5 4 3 3 2 | 26 16 13 11 8 7 6 5 4 |
XHHW, XHHW-2 | 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 | 8 6 4 2 1 1 1 1 1 1 0 0 0 | 14 11 8 4 3 2 1 1 1 1 1 1 1 | 24 18 13 7 5 4 3 3 1 1 1 1 1 | 42 32 24 13 10 7 6 5 3 3 2 1 1 | 57 44 32 18 13 9 8 7 5 4 3 3 2 | 94 72 54 30 22 16 13 11 8 7 6 5 4 |
Fittings and connectors shall be used only with the specific wiring methods for which they are designed and listed.
Exception: Where nonmetallic-sheathed cable is used with boxes not larger than a nominal size of 21/4 inches by 4 inches (57 mm by 102 mm) mounted in walls or ceilings, and where the cable is fastened within 8 inches (203 mm) of the box measured along the sheath, and where the sheath extends through a cable knockout not less than 1/4 inch (6.4 mm), securing the cable to the box shall not be required.
Exception: Utilization equipment that is listed to be installed with specified boxes.
Exception: A wall-mounted luminaire or lampholder weighing not more than 6 pounds (2.7 kg) shall be permitted to be supported on other boxes or plaster rings that are secured to other boxes, provided that the luminaire or its supporting yoke is secured to the box with not fewer than two No. 6 or larger screws.
Where spare, separately switched, ungrounded conductors are provided to a ceiling-mounted outlet box and such box is in a location acceptable for a ceiling-suspended (paddle) fan, the outlet box or outlet box system shall be listed for sole support of a ceiling-suspended (paddle) fan.
TABLE E3905.12.1
MAXIMUM NUMBER OF CONDUCTORS IN METAL BOXESa
BOX DIMENSIONS (inches trade size and type) | MAXIMUM CAPACITY (cubic inches) | MAXIMUM NUMBER OF CONDUCTORSa | ||||||
18 Awg | 16 Awg | 14 Awg | 12 Awg | 10 Awg | 8 Awg | 6 Awg | ||
4 × 11/4 round or octagonal | 12.5 | 8 | 7 | 6 | 5 | 5 | 4 | 2 |
4 × 11/2 round or octagonal | 15.5 | 10 | 8 | 7 | 6 | 6 | 5 | 3 |
4 × 21/8 round or octagonal | 21.5 | 14 | 12 | 10 | 9 | 8 | 7 | 4 |
4 × 11/4 square | 18.0 | 12 | 10 | 9 | 8 | 7 | 6 | 3 |
4 × 11/2 square | 21.0 | 14 | 12 | 10 | 9 | 8 | 7 | 4 |
4 × 21/8 square | 30.3 | 20 | 17 | 15 | 13 | 12 | 10 | 6 |
411/16 × 11/4 square | 25.5 | 17 | 14 | 12 | 11 | 10 | 8 | 5 |
411/16 × 11/2 square | 29.5 | 19 | 16 | 14 | 13 | 11 | 9 | 5 |
411/16 × 21/8 square | 42.0 | 28 | 24 | 21 | 18 | 16 | 14 | 8 |
3 × 2 × 11/2 device | 7.5 | 5 | 4 | 3 | 3 | 3 | 2 | 1 |
3 × 2 × 2 device | 10.0 | 6 | 5 | 5 | 4 | 4 | 3 | 2 |
3 × 2 × 21/4 device | 10.5 | 7 | 6 | 5 | 4 | 4 | 3 | 2 |
3 × 2 × 21/2 device | 12.5 | 8 | 7 | 6 | 5 | 5 | 4 | 2 |
3 × 2 × 23/4 device | 14.0 | 9 | 8 | 7 | 6 | 5 | 4 | 2 |
3 × 2 × 31/2 device | 18.0 | 12 | 10 | 9 | 8 | 7 | 6 | 3 |
4 × 21/8 × 11/2 device | 10.3 | 6 | 5 | 5 | 4 | 4 | 3 | 2 |
4 × 21/8 × 17/8 device | 13.0 | 8 | 7 | 6 | 5 | 5 | 4 | 2 |
4 × 21/8 × 21/8 device | 14.5 | 9 | 8 | 7 | 6 | 5 | 4 | 2 |
33/4 × 2 × 21/2 masonry box/gang | 14.0 | 9 | 8 | 7 | 6 | 5 | 4 | 2 |
33/4 × 2 × 31/2 masonry box/gang | 21.0 | 14 | 12 | 10 | 9 | 8 | 7 | 4 |
Exception: An equipment grounding conductor or not more than four fixture wires smaller than No. 14, or both, shall be permitted to be omitted from the calculations where such conductors enter a box from a domed fixture or similar canopy and terminate within that box.
TABLE E3905.12.2.1
VOLUME ALLOWANCE REQUIRED PER CONDUCTOR
SIZE OF CONDUCTOR | FREE SPACE WITHIN BOX FOR EACH CONDUCTOR (cubic inches) |
18 AWG | 1.50 |
16 AWG | 1.75 |
14 AWG | 2.00 |
12 AWG | 2.25 |
10 AWG | 2.50 |
8 AWG | 3.00 |
6 AWG | 5.00 |
Exception: Where threaded hubs or bosses that are an integral part of a cabinet, box enclosure, or raceway provide a smoothly rounded or flared entry for conductors.
Conduit bushings constructed wholly of insulating material shall not be used to secure a fitting or raceway. The insulating fitting or insulating material shall have a temperature rating not less than the insulation temperature rating of the installed conductors.
Where raceway or cable is installed with metal boxes, or conduit bodies, the raceway or cable shall be secured to such boxes and conduit bodies.
Exception: Rigid metal, intermediate metal, or rigid polyvinyl chloride nonmetallic conduit or electrical metallic tubing shall be permitted to support a conduit body of any size, provided that the conduit body is not larger in trade size than the largest trade size of the supporting conduit or electrical metallic tubing.
Exceptions:
TABLE E3907.8
PERCENT OF CROSS SECTION OF
CONDUIT AND TUBING FOR CONDUCTORS
NUMBER OF CONDUCTORS | MAXIMUM PERCENT OF CONDUIT AND TUBING AREA FILLED BY CONDUCTORS |
1 | 53 |
2 | 31 |
Over 2 | 40 |
If used to connect equipment where flexibility is necessary to minimize the transmission of vibration from equipment or to provide flexibility for equipment that requires movement after installation, an equipment grounding conductor shall be installed.
If used to connect equipment where flexibility is necessary to minimize the transmission of vibration from equipment or to provide flexibility for equipment that requires movement after installation, an equipment grounding conductor shall be installed.
TABLE E3908.12
EQUIPMENT GROUNDING CONDUCTOR SIZING
RATING OR SETTING OF AUTOMATIC OVERCURRENT DEVICE IN CIRCUIT AHEAD OF EQUIPMENT, CONDUIT, ETC., NOT EXCEEDING THE FOLLOWING RATINGS (amperes) | MINIMUM SIZE | |
Copper wire No. (AWG) | Aluminum or copper-clad aluminum wire No. (AWG) | |
15 | 14 | 12 |
20 | 12 | 10 |
Deleted | ||
60 | 10 | 8 |
100 | 8 | 6 |
200 | 6 | 4 |
300 | 4 | 2 |
400 | 3 | 1 |
The equipment bonding jumper on the load side of an overcurrent devices shall be sized, as a minimum, in accordance with Table E3908.12, but shall not be required to be larger than the circuit conductors supplying the equipment. An equipment bonding conductor shall be not smaller than No. 14 AWG.
A single common continuous equipment bonding jumper shall be permitted to connect two or more raceways or cables where the bonding jumper is sized in accordance with Table E3908.12 for the largest overcurrent device supplying circuits therein.
TABLE E3909.2
MAXIMUM AMPERE LOAD FOR FLEXIBLE CORDS
CORD SIZE (AWG) | CORD TYPES S, SE, SEO, SJ, SJE, SJEO, SJO, SJOO, SJT, SJTO, SJTOO, SO, SOO, SRD, SRDE, SRDT, ST, STD, SV, SVO, SVOO, SVTO, SVTOO | |
Maximum ampere load | ||
Three current-carrying conductors | Two current-carrying conductors | |
18 16 14 12 | 7 10 15 20 | 10 13 18 25 |