Google the term "auto transformer".
That is actually the generic term. Variac was a brand name.... And it just stuck.
I thought it regulated voltage to coil pit a meter on it how s that for the dumbest question?
I apologize for lack of punctuation in my writing it was bothering some one they mentioned it I need glasses them symbols are too small on my phone keypad and I cant remember if they taught that stuff in the sixth grade
My favorite thing I found at work was at an old folks home that the pool equipment electric kept tripping the breaker it had a bad motor upon repairing it I noticed a single wire running through a piece of conduit followed it to an outlet in pool area they used the conduit for the neutral no ground.....
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