A Master Electrician may qualify (be master of record for) how many contractor licenses {Ans: One}To use flexible metallic conduit as a grounding means, what is required {Ans: Cossin doesn't really answer this. It could be any of the following, are a combination. • The conduit is terminated in listed fittings • The circuit conductors in the conduit are protected by an OCPD rated 20A or less • The size of the conduit does not exceed metric designator 35 (trade size 1 1â„4") • The length of the ground-fault current path does not exceed 1.8 m (6')}What is the required minimum wire size for a ground ring {Ans: #2 American Wire Gage (AWG)}Underground Rigid PVC, subject to damage, must be what minimum material {Ans: Schedule 80}Permits for electrical repairs are required if the value exceeds {Ans: $100}Openings through which conductors enter boxes, fittings, or conduit bodies, are to be {Ans: closed}