add another light so there is one powered from each unit. ive seen that many times over the years. or is this on the house meter or wired into one unit?
Did they operate as three-way switches? In other words, if the light was on, could you turn it off by flipping either switch? If so, then it is one circuit. Or, does the light come on any time either switch is on, and both switches must be off to turn the light off? If that's the case, then you could have two circuits feeding it. It is not code compliant or safe to have two circuits feed it. If that's how it's wired, it should be changed. Such an arrangement would allow either panel to be backfed by the other panel even when the main breaker is turned off. That's dangerous.Yes I understand I could hook it up to a three way switch but these to were right beside each other and switch said unit 1 the other said unit 2. So this is why I believe there were two separate circuits.
The many industrial sparkies I have known in my carreer tower above residential electricians in knowledgeI come from an industrial electrical background and do not know all the little tricks like this.
How do you turn the light off?One way to do it is-
Wire the centre toggle of the single pole double throw (e.g. 3 way) switch to the lamp (hot).
Then one of the positions to unit 1 supply.
The other position goes to unit 2 supply.
This would work ...
How do you turn the light off?
Note that a load may not receive a hot feed from one circuit and use the neutral of another circuit.
But you don't want to help him here?As a journeyman electrician, you would be happily welcomed at ContractorTalk.com. I'm sure you would get fine help there
That might not be necessary. All of us here already told him everything including that what he said he wants to do may not be done.Hire an electrician, cause I don't know what you ...
I did help him, I told him to hire an real electrician. Anyone who claims to be an industrial electrician used to wiring high voltage systems, yet needs to ask rudimentary questions about wiring a switch in a residential application should be viewed with a highly jaundiced eye.But you don't want to help him here?
I guess this would be your reply to everyone who posts here? Why did you join this site, again?Given the dangers involved, the OP should hire an electrician capable of the job who does not need to consult anonymous strangers for "how to" questions as he proceeds