randy263
Member
- Location
- Los Angeles, California
apologies if this seems too elementary but I have not been able to find a definitive answer or code reference. If I am running a feeder to a subpanel in EMT, do I need to pull a grounding conductor or can the conduit serve as ground as it would for a branch circuit? I'm worried about ground impedance and OCD clearing in the event of a fault (not sure what the cross-section of EMT metal is or how it compares to the current-carrying conductors).
If a ground conductor is not required, is it bad practice to run one anyway? Can it be bare copper or is insulation required? If it is a supplemental ground (i.e. not required by code) is there minimum conductor size?
If a ground conductor is not required, is it bad practice to run one anyway? Can it be bare copper or is insulation required? If it is a supplemental ground (i.e. not required by code) is there minimum conductor size?