Wiring a new cottage (Michigan) bathroom. The local code requires that a 20-amp receptacle be installed that is GFCI protected and that no other receptacles are on this line. Can I use a 15-amp GFCI with 12 gauge wire on a 20-amp circuit, or do I have to use a 20-amp GFCI? I understand that the outlet is only rated at 15 amps that way, and guess that is sufficient for a bathroom. Is that compatable with a 12 gauge wire?
This does not make sense, i.e. that no other receptacles be on that bathroom 20-amp GFCI circuit. Wondering if it means no lighting is to be connected? I would like to connect another receptacle on the other side of the vanity top. Would that require a separate 20-amp GFCI circuit?
And regarding lighting wiring, there will be a heat lamp, vanity lamps, an exhaust fan, AND a light over the shower tub combination in the ceiling. I will of course use a "wet location" trim for the recessed lighting can. Did not see a requirement to GFCI protect lighting circuits. Is this the norm? I do feel however that the can for the ceiling lights above the tub/shower should be GFCI protected in case one touches them while bathing, or would that create nuisance trips? What is usually done there, and for the the other light/fan items - GFCI there as well on a circuit separate from the receptacle?
Will use 20-amp for the receptacle and 15-amp for the lights and fan - is this the norm there as well. Thanks.