Originally Posted by
infinity
It depends on the OCPD used for the 120 volt circuit. In this case if the circuit is 15, 20, or 30 amps (which requires an EGC the same size as the phase conductors) the EGC is increased at a ratio of 1 to 1 or the same size tkb stated.
Correct.
Now take OP's same circuit, assuming copper conductors and put a 150 amp breaker at the beginning - then put a 15,20 or 30 amp breaker at the load end of that 1/0 and short run of 14,12 or 10 AWG to the load and you still have essentially same thing but can 6 AWG EGC instead of a 1/0 EGC with the feeder segment of this.
Totally makes sense doesn't it?
I live for today, I'm just a day behind.
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