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Originally Posted by Delphinus
I can answer that question for you!! 
Quad tap means there are 4 available .. um .. "tap" configurations (tri tap is another commonly used ballast, then double and single-tap). What this means is there are 4 ways to power the ballast: 120 VAC, 240VAC, 377V and um .. I think 480 is the last choice. |
FWIW I believe it's 120v,208v,240v,277v. I wonder how they come up with 208 and 277 though.