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// CODE SNIPPET

E3908.12 Equipment Grounding Conductor Size

2014 FBC - Residential, 5th edition > 39 Power and Lighting Distribution > E3908 Grounding > E3908.12 Equipment Grounding Conductor Size
JUMP TO FULL CODE CHAPTER

Copper, aluminum and copper-clad aluminum equipment grounding conductors of the wire type shall be not smaller than shown in Table E3908.12, but in no case shall they be required to be larger than the circuit conductors supplying the equipment. Where a raceway or a cable armor or sheath is used as the equipment grounding conductor, as provided in Section E3908.8, it shall comply with Section E3908.4. Where ungrounded connectors are increased in size, equipment grounding conductors shall be increased proportionally according to the circular mil area of the ungrounded conductors.

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)
151412
201210
60108
10086
20064
30042
40031

E3908.12.1 Multiple Circuits

Where a single equipment grounding conductor is run with multiple circuits in the same raceway or cable, it shall be sized for the largest overcurrent device protecting conductors in the raceway or cable.

Related Code Sections


E3908.12 Power and Lighting Distribution, Equipment Grounding Conductor Size
as the equipment grounding conductor, as provided in Section E3908.8, it shall comply with Section E3908.4. Where ungrounded conductors are increased in size ...
2017 FBC - Residential, 6th edition > 39 Power and Lighting Distribution > E3908 Grounding > E3908.12 Equipment Grounding Conductor Size
E3908.12 Power and Lighting Distribution, Equipment Grounding Conductor Size
in size, equipment grounding conductors shall be increased proportionally according to the circular mil area of the ungrounded conductors. TABLE ...
2014 FBC - Residential, 5th edition > 39 Power and Lighting Distribution > E3908 Grounding > E3908.12 Equipment Grounding Conductor Size
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Pool-associated motors shall be connected to an insulated copper equipment grounding conductor sized in accordance with Table E3908.12 ...
2014 FBC - Residential, 5th edition > 42 Swimming Pools [Electrical Provisions] > E4205 Grounding > E4205.5 Motors
E3607.3.1 Services, Equipment Grounding Conductor
or frames required to be grounded or bonded. The equipment grounding conductor shall be sized in accordance with Section E3908.12. Any installed ...
2014 FBC - Residential, 5th edition > 36 Services > E3607 System Grounding > E3607.3 Buildings or Structures Supplied by Feeder(s) or Branch Circuit(s) > E3607.3.1 Equipment Grounding Conductor
E4205.5 Swimming Pools [Electrical Provisions], Motors
Pool-associated motors shall be connected to an insulated copper equipment grounding conductor sized in accordance with Table E3908.12 ...
2017 FBC - Residential, 6th edition > 42 Swimming Pools [Electrical Provisions] > E4205 Grounding > E4205.5 Motors
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