In a message dated 5/30/2006 7:19:24 A.M. Eastern Standard Time, r@somis.org
writes:
If you own the abode, plus you have 600v-rated 3-wire romex feeding
a 120v outlet in the room, and you have an open slot in your circuit
breaker box, adding a double-breaker with a 240v outlet is
electrically do-able without pulling more wire.
Unlikely, but possible. Some newer homes might fit this possibility. A
zealous electrician such as myself may have brought up a 12-3 home run to one
bedroom and split off the second circuit to the next adjacent room. If this
where the case, one could possibly find the outlet in the room where the 12-3
originates and could pick up the black and red wires there and install a 240
outlet at that point. If done, it would be required to replace the separate
breakers with a double pole breaker which has a tie bar between them.
Another thought is that some older homes may have had a separate 120v " home
run" added to some outlet in the room (usually near a window) for an air
conditioner. If this 120v home run was dedicated to that outlet alone, it
could
be converted over to a 220v line with little effort.
Also, homes with electric heat are a good source for a 220v line in that
room, be sure to turn the T-stat off when running the amp so as not to overload
the breaker.
These 3 options are only "possibilities", your set up at home may not
contain either in which case a new line from your panel must be run.
And we all know about running 220 (240v) lines properly by now :-)
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