On 5/1/2011 9:12 PM, RBM wrote:
"The Daring wrote in message
...
On 5/1/2011 7:40 PM, wrote:
OK, here'e the questiond du jour. Was helping a friend and when we
took off the circuit breaker panel cover we discovered that for both
AC units, whoever did this used white for one of the 240V hots. There
is no tape or tag to identify it as a hot. Is this allowed by code?
Even if it is, seems bad practice to me. I would have used either red
or black.

If you see a 10/2 with ground hooked to a two pole breaker on one end and
disconnect for an AC condensing unit, water heater or dryer plug
on the other end, you pretty much know that the white wire is another
240 volt leg.

I agree with you, although, you should NEVER have a 10/2G feeding an
electric dryer, unless you can find a piece of 10/2 SEU copper, which I've
never seen.
Despite the code, it is extremely rare that I ever see the white wire
remarked



I've seen it for years but as of late the rule change calls for a four
wire circuit. Years ago I installed a lot of dryers with 10/2 w/gr but
now I use 10/3 w/gr or 8/3 w/gr. The smallest aluminum SEU you can run
in a house around here is #2 which I often use for stoves. Moving an old
dryer to a new location has us removing the old 3 wire cord and plug for
the 4 wire cord and plug. I often run 10/2 w/gr to the disconnect for a
2 ton condensing unit and never bother to mark the white wire because
it's in the same jacket as the black and ground.

TDD