I realize that 277V is derived from a 3-phase Y transformers' line-line voltage (480V/1.732). So, my way of thinking is that if you draw a 3-phase Y transformer, you would connect your load (in this case lighting) say from a-phase to b-phase. But that is not the case, there are not 2 phases there, there is instead a hot and a neutral. Where did the neutral come from? How is 277V lighting wired? And why is it dangerous to work on energized 277V lighting circuits?
Wiring 277V Lighting
- Thread starter alittleee
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The source would be 480 Wye not 480 delta and you would have 480 line to line and 277 from any line to neutral.
This is no different than 208Y/120 ..... other than the voltage itself.
sorry
sorry
I am sorry. I was just getting ready to argue with you and I was typing out the "formula" and realized I was thinking just bass ackward. Line voltage is higher than phase voltage in Y connections. Sorry to waste your time. But - it made me think strait by trying to argue with you anyway.
sorry
I am sorry. I was just getting ready to argue with you and I was typing out the "formula" and realized I was thinking just bass ackward. Line voltage is higher than phase voltage in Y connections. Sorry to waste your time. But - it made me think strait by trying to argue with you anyway.
Go ahead and argue
,To quote G B Shaw:I learned long ago, never to wrestle with a pig. You get dirty, and besides, the pig likes it.
George Bernard Shaw
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