There's brass pipe and there's copper tubing. With the price of copper and brass going up, can you run the conduit in PVC instead? As far as using copper for conduit, under fountain codes in section 680, copper is mentioned, but I don't recommend using it. I think that the only reason copper is mentioned in the fountain codes is because it is used as a nipple for an above-slab junction box for a freestanding underwater light or submersible pump. Codes are more lenient when describing nipples (less than 24" long) instead of full lengths of conduit. Only plumbing fittings can be used with copper tubing. I recommend running the niche light with PVC conduit, just make sure the light is bonded.
What do you mean by moving a motor circuit?
