Hello- I wish to convert my 220v circuits to 110v as I have brought
natural gas into the home leaving free dedicated circuits from the old
elec. dryer, range and water heater.
I intend to switch out the breaker to a single pole 20 amp attach the
black wire to the new breaker and the second hot (red) I will lable
white and attach to the rail. The new 110 outlet I would rewire
normally. Is this procedure up to NEC snuff?
What if I needed a longer line and spliced (inside a junction box) to a
smaller gage wire such at 12/2 romex?
I would NOT attach the red wire to anything. Just label it, cap of
leave it pendant. You might want to use it at a later time.....
A wire left pendant makes it obvious it is not being used. If it is
attached, the next
guy to look in the box won't know what the hell you did with it....
You might put a tag on it saying something like "Unused, formerly to
laundry room", just to make it easy for everyone....
Andy in Eureka, Texas
If I read OP's request correctly, that isn't an option. I believe he
has a 12/2 (say) w/g and wants to convert the 220V service to 110. If
he doesn't use the red "hot" as the neutral, he has no circuit (ok, he
_might_ have a four-wire service, but doesn't seem likely given the
To OP, my understanding is that w/ existing work that would be
allowable if you label both ends as neutral, but don't quote that as
fact. I know it would be flagged in new work, of course, but am not
positive it would actually be a violation of NEC but I can see an
inspector rejecting it "just because" and because "it ain't natural".
For an extension beyond the first terminal, yes you can make the
connection there by an approved means just as any other circuit. While
a smaller conductor would be protected by the smaller breaker, I would
recommend it just on general principles of keeping the entire circuit
homogenous in case something were done later. The principal problem is
that the circuit would _appear_ 30A-capable at the service panel but
unbeknownst to someone, downstream it would not be.
The NEC specifically requires that neutral conductors 6-gauge and smaller be
white or gray end-to-end. It's absolutely a Code violation to re-label a red
wire as a neutral, unless it's larger than 6-gauge.
[NEC 2005, Article 200.6(A)]
Doug Miller (alphageek at milmac dot com)
Why does it only apply if the conductor is 6-gauge and smaller. Do you mean
smaller gauge (larger wire), or smaller wire (larger gauge)?? This gauge
unit seems to be defined backwards (and is #1 gauge the largest wire
The reason for requiring continuous marking up to six gage is that
larger conductors are not readily available with continuous jacket color
Wires larger than #6 American Wire Gage are only required to be marked
at the terminations and other accessible points.
When the gage was devised it was believed that #1 was the largest gage
possible. Then gage 0; said as ought; was added, followed by 2/0, 3/0
and 4/0 (four ought) until they finally gave in to the inevitable and
began using circular mills to size wires larger than 4/0.
"This alternating current stuff is just a fad. It is much too dangerous
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