On 5/2/2011 5:37 AM, RBM wrote:
"The Daring wrote in message
...
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
10/2g is fine for hot water heaters, or A/C units. It has never been
acceptable for an electric dryer, because the ground/neutral was required to
be insulated. The only exception was using SUE cable, originating from the
main service panel
I could swear the darn things have been hooked up for years with a 3
wire plug and 10/2 but I do go with a 4 wire hook up now. The last
one I installed was in a restaurant where I ran EMT 3 #8's and a #10
ground. The last one I installed in a home was an 8-3 w/gr Romex
circuit with the four wire receptacle. I used #8 because it was on the
far end of the house, short runs to a dryer get 10-3 w/gr and 4 wire
plug and cord.
http://preview.tinyurl.com/3ff8ata
http://preview.tinyurl.com/3pmzqgc
TDD