I’m looking to run 3 circuits 20A 120VAC (3 wires per circuit; H,N,& G, 12 gauge THHN) together through 3/4” FMC. Circuits will have ground fault and arc protection breakers. Residential basement run to power kitchen outlets.
Code requires earth ground cable (EGC) for ground fault since exceeding 6’ length.
Each of the circuits ground wire will have a jumper connection to ground screw at each junction box.
I’ll be using listed connectors to connect the conduit to each junction box.
What I don’t understand is how to connect the EGC to the FMC. Since the FMC is not considered suitable for ground faults, I don’t see how to protect for ground fault inside the FMC. Is it enough to run a 12 gauge bare copper wire and jump it to circuit ground at the junction box, same as the box?
I have the NEC 2023 handbook.