So, the other day I went out to a job b/c one of my guys said there was an issue with voltage on this machine. The machines are in a vet clinic and there are two identical units. The machines have a tank that gets hot inside somehow with steam or something for sterilization. I'm not real sure how they work, but they have a series of heaters (not submersed) all around them. Anyhow, they are single phase 3 wire 208/240 rated and hooked up 240. One of the units is using the high leg of a delta service, which is of no consequence IMO. (although the machine tech insisted that was the problem)
I identified the problem, which was an open ground on the receptacle. I corrected it and the problem went away. I looked everywhere for a bootleg neutral connection inside these things to no avail. So my question is, can all those heaters "leak" voltage onto the machine with no ground? I'm talking like a 180V's with a digital meter that disappeared under the load of a wiggie. You could feel it tho. I still think there is a 120V connection or something inside but we took it all apart and I couldn't find one.
Sorry for the novel
I identified the problem, which was an open ground on the receptacle. I corrected it and the problem went away. I looked everywhere for a bootleg neutral connection inside these things to no avail. So my question is, can all those heaters "leak" voltage onto the machine with no ground? I'm talking like a 180V's with a digital meter that disappeared under the load of a wiggie. You could feel it tho. I still think there is a 120V connection or something inside but we took it all apart and I couldn't find one.
Sorry for the novel