wrote in message ...
On Tuesday, November 19, 2013 12:03:14 PM UTC-5, nestork wrote:

snip

Don't let krw see that. The reference clearly says that
with a spit-phase 240v/120v service, there are two phases present
and they differ by 180 degrees. He says that just can't be.

http://www.allaboutcircuits.com/vol_2/chpt_10/1.html




more snip

They used to provide a protective cover for the transformer ground.
In the old days it was a U-shaped channel milled out of wood.