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Originally Posted by tkamiya
Nope. You have SINGLE phase coming into homes. Unless, of course, you have a HUGE house that some of your appliances must run on 3 phase.
What you got in most homes are single phase, center tapped and grounded 240. 120 volts from neutral to hot on each leg.
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I've always been confused on this issue. An engineer explained it once but, I forgot the answer.
The 120 single phase that comes into the house are two single phase lines. However they are 180 degrees out of phase. This is referred to as single phase, but, I never understood how the power company managed to send two lines into a home that are 180 degrees out of phase. If you measure across the two lines, you get 240V. Any one line to the neutral is 120V.
So, the electrical engineer needs to speak up, again.
