"Oz" <
caedfaa9ed1216d60e...@example.com> wrote in message
news:6023e$5216da81$cf3aab60$68...@news.flashnewsgroups.com...
Inside your main breaker box are two bus bars, one powered by the large
black wire, and one powered by the large red wire. These two wires are
opposing 1/2 phases of the alternating current. In order for 220/240 single
phase to work correctly, a double, tied breaker is installed so that each
one connects to a different bus.
Starting at the top of the panel, the top-most breaker connects with one bus
bar. The next one down connects to the opposite bus bar. As you move down
the panel they alternate.
220/240 single phase is wired using both the black and the red, so a 240
breaker forces the two breakers to be next to each other and therefore a
joined pair with each powered by the opposite 1/2 phase.
A MUCH BETTER question to ask is if the generator you are planning to use
supports 240 operation....Usually it has to be a pretty large genny before
it offers 220/240VAC.
A 220/240 pump will not run on two single 110VAC feeds supplied from a
non-220/240VAC generator because both feeds are the same 1/2 phase.
To visualize the 1/2 phase thing - alternating current flows in both
directions - pushing then pulling and pulling if you will - Both black and
red wires push then pull, but black would be pushing while red is pulling
and then the opposite. These opposing 1/2 phases are what makes 220/240
motors so much more efficient becuse they are designed to use both to move
the stator