Regarding GFCI outlets in bathrooms and kitchens. Is one required in every outlet on vanity near sinks? or is it the first in the feed, or is it every one within 4 feet of sink?
My understanding from working along side the electrical inspector is that all outlets within a given distance of a water source must be GFCI protected. That said, you can wire one in first and all the normal outlets "downstream" will trip that first one. I suspect there maybe be more requirements as to how many, and how that is done, but I've seen those approved over an over as long as they were properly wired. I suspect others here are more directly familiar with the NEC.
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