In article , "Bob" wrote:

"Doug Miller" wrote in message
.com...

It is perfectly safe, and does not violate code, as long as:
a) the two hot conductors are on opposite legs of a 240V service, *and*
b) a *single* disconnecting means will disconnect *both* of them at once.
Both of these criteria are easily satisfied by using a standard two-pole
breaker: the two sides are necessarily on opposite legs, and one handle
disconnects them both at once.

Doug, you seem to know what you are talking about. What's your experience
with how often this is actually done? It seems to me that, though legal and
safe, someone might forget how this is setup and rearrange breakers/wiring
in the future, creating an unsafe situation. Are there any requirements for
tagging such a configuration?

It seems to me that it's a pretty common thing. There are no requirements for
tagging it that I'm aware of, but if it's wired properly (double-pole breaker,
and 12/3 wire, with red and black hot wires) the installation itself should be
sufficient to identify it as what it is -- and with a double-pole breaker,
it's impossible to break it up by rearranging the breakers.

--
Regards,
Doug Miller (alphageek-at-milmac-dot-com)

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