James, On Monday 21 March 2005 16:24, James Knott wrote:
Randall R Schulz wrote: ...
I don't know about where you are, but in North America, a split phase 240/120V system is used, where the center tap of the line transformer is grounded and becomes the neutral. The two "hot" lines are 180 degrees apart, and have 240V between them. It is possible to have leakage to the opposite phase.
Any single branch circuit in a residential environment (except for those used for things like electric stoves) is single phase.
...
Hmmm... I wonder, how do GFCIs deal with reactive loads? Do they time average the current measurement over several cycles?
The currents should always be exactly opposite, no matter what the reactance is. Remember, you're comparing current, not phase relationship. Also, current in a series circuit with have the same phase relationship at any point.
Yeah. Carlos already reminded me of that. Randall Schulz