According to Jud McCranie :
On 21 Sep 2004 19:30:43 GMT, (Chris Lewis)
wrote:

Why would some rooms have electricity and others not, in a situation
like this?

Simply depends on which 120V "leg" they were attached to.

OK, so part of the 120V in the house could be on one leg and part on
the other, and that is why part of the house was working and the other
wasn't.

Right.

A related question: what kind of wave is on the 240V line - sine,
square, or other? IS the 120V the same, or is it only one side of the
240V wave?

Both 120V and 240V circuits are sine wave when you compare one lead
to the other. Or when you compare any hot lead to neutral or ground.
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.