So I’m in the stages of adding a tankless water heater outside and currently there is no power source nearby. Can I tie into an existing outlet inside and feed it that way? It’s a stucco wall, can I, or should I use Romex or single wires? Can it go through plastic conduit or should it go through metal conduit? I know it’s got to be gfci so is it as simple as a gfci outlet? My main panel is on the opposite side of the house so I’m trying to avoid it’s own circuit. Not concerned of being up to code but want it safe.