beanland
Senior Member
- Location
- Vancouver, WA
I just want a reality check on the absurdity when increasing the size of EGC per 250.122(B).
If I use 250kcmil copper phase conductors, fed by a 200A OCPD, I can use a #6 copper EGC. 250.122(A)
If I use a 30A OCPD, because #10 copper is rated for 30A and the EGC for 30A is #10 copper, 250.122(B) requires I use a 250kcmil copper EGC with the 250kcmil phase conductor.
Correct?
If I use 250kcmil copper phase conductors, fed by a 200A OCPD, I can use a #6 copper EGC. 250.122(A)
If I use a 30A OCPD, because #10 copper is rated for 30A and the EGC for 30A is #10 copper, 250.122(B) requires I use a 250kcmil copper EGC with the 250kcmil phase conductor.
Correct?