"Pete C." wrote in message
...
wrote:

That's one thing people often do not understand. If you have a 100A
service and only use 120V items in the house, you can actually draw
200A. But if you have all 240V appliances, you can only use 100A. Of
course most homes have both, so that's where the mathematics comes
into play.

Mark

The total power is the same either way or in combination.

100A x 240V = 24,000W
or
200A x 120V = 24,000W
or
50A x 240V = 12,000W
+
100A x 120V = 12,000W
=
24,000W total
etc...

If you happen to have a perfectly balanced system, which is most unlikely...