And learned sumpin.
When you are going to go in an existing conduit box don't just throw the appropriate breaker.
CHECK THE NEUTRAL AND GROUND with a tester. Check em all.
I got a slick little circuit breaker finder. Used it to find the breaker. Threw it to off. opened the box checked the neutral and hot lines and got no energy.
Then as I was working my hand brushed the neutral and up against the metal box. OUCH~!!!!
So in bafflement I tested that and lo there was 125 VAC between the neutral and the ground.
I found that breaker that energized that neutral and tossed it to off.
IT seems to energize nothing else in the building so it's locked out till an electrician can look at it.