240V 3phase, 3 wire is for all his cabinet making machinery. Yes,there is a transformer inside for his 120/240V loads. Crimped butt-splice is not lava, but is blackened, with some type of "goo" leaking out. Short to ground on Phase A was initially what I thought, until kicked main off, and it jumped back to 240V. That was when I got stumped. Never thought of butt-splice acting as a type of resistor, but makes sense. I also thought with winter here, if there was a cut in insulation in conduit somewhere, water in conduit turning into ice(expanding) could be causing a "voltage leak", short to ground, even though customer claims pipe is 36" deep. Oh well, going back today to change out splice and see what kind of results we get.
