Quote:
Originally Posted by cavie
Thank you for that information. I never heard of that in all my 50 years as a Master Electrician! We were talking about 50 amp Service Transfer switches.
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I'm not saying you were wrong calling it a contractor, in the 120 VAC work the names are pretty much interchangeable, I'm just point out that the term relay in an RV Air conditioner was not wrong either.
In your work experience they were probably all called contactors by the manufacturers. In my mind/work experience I think on relays as controlling a single current path with one set of NO or NC contacts. I think of contactors as having multiple sets of contacts, some NO, some NC, controlled by a low voltage signal. I don't think the use of either term in any context is wrong, I'll know what you mean, and schematics can go either way as well.
In the RV world I would think of the relay in a thermostat/Air Conditioner as a relay and the ATS as a contactor.