[ale] Not so evil empire

[Mike Harrison]

On Fri, 17 Jul 2009, JK wrote:

> David Ritchie wrote:
>>> Am I correct in believing that a 220AC outlet, such as the one I have in my house
>>> for the hot tub, requires at least 2 phases?
>>
>> No, it is single phase fed, with a center tapped transformer secondary
>> that is (or should be) grounded near
>> your service entrance. The two sides of the 220 line are 180 degrees
>> out of phase to each other.
>
>
> But... wouldn't that (having two sides 180deg out) mean there would have
> two be two different physical sinewaves on the two sides? Hence two
> different phases?

It is effectively 2 different phases, 180 degress off.