cohosilver
Member
Can parallel equipment grounding conductors be smaller than 1/0 awg?
For example, I have a an 800 amp disitribution panel feeding a 400 amp sub distribution panel with two runs of 4/0 awg feeders and neutral and a #3 awg equipment grounding conductor run with the feeders and neutrals in each conduit. The #3 awg is sized by Table 250.122. Is this correct, or are the equipment grounding conductors required to be a minimum of 1/0 awg per 310.10(H) Conductors in parallel?
250.122(F) Conductors in parallel state that each equipment grounding conductor shall be sized in compliance with 250.122.
310.10(H) Condcutors in parallel states that conductors in parallel shall be 1/0 awg or larger.
310.10(H)(5) discusses Equipment Grounding Conductors in parallel and states they shall be sized by 250.122. Then it describes multiconductor cable (I am presuming Types G or W or similar) where there are multiple small equipment grounding conductors and that they can be smaller than 1/0.
Respectfully,
Cohosilver
For example, I have a an 800 amp disitribution panel feeding a 400 amp sub distribution panel with two runs of 4/0 awg feeders and neutral and a #3 awg equipment grounding conductor run with the feeders and neutrals in each conduit. The #3 awg is sized by Table 250.122. Is this correct, or are the equipment grounding conductors required to be a minimum of 1/0 awg per 310.10(H) Conductors in parallel?
250.122(F) Conductors in parallel state that each equipment grounding conductor shall be sized in compliance with 250.122.
310.10(H) Condcutors in parallel states that conductors in parallel shall be 1/0 awg or larger.
310.10(H)(5) discusses Equipment Grounding Conductors in parallel and states they shall be sized by 250.122. Then it describes multiconductor cable (I am presuming Types G or W or similar) where there are multiple small equipment grounding conductors and that they can be smaller than 1/0.
Respectfully,
Cohosilver