DIYbanter - View Single Post - NIMA 14-50

Dean Hoffman[_12_]

On 9/13/20 9:41 AM, wrote:
On Sunday, August 2, 2020 at 7:30:11 PM UTC-5, Sid wrote:
Can a NEMA 14-50 receptacle be wired up with #10 wire ?
What if you doubled up each wire ?

Would that meet code ?
what if you found one wired up that way ?

Any help appreciated.
Thanks

Found a professional electrician to pull conduit and wire up 50 amp receptacle in garage. He stated that we needed #6 wire for the two mains, but that #10 wire could be used for the ground. All could be pulled in 1/2" conduit, but the conduit would be full and any additional wires would be overfill.

Not knowing the electrical code, Is this correct ?
Do you guys agree ?

Thanks

The pictures I've found show that as a 4 wire receptacle. I'm
thinking you need 4 wires, not three. A rule of thumb is the neutral
can be one size smaller than the two incoming hot wires which would put
it at #4. So 2 #6, 1 #4, and 1 #10.
http://conduitfillcalculator.com NO on the #10. See below.
The equipment ground wire sizing depends on the overcurrent device
used. (Circuit breaker or fuses) He's apparently going to use a 60
amp breaker.
BUT., the outlets I've found specify 4,6, and 8 awg so he isn't
supposed to use the #10.
Here's a calculator.
http://wiresizecalculator.net/calculators/groundconductor.htm
Wire fill isn't supposed to exceed 40% of the conduit area. 3/4"
won't quite cut it. Anyhow, I think 1" is what you should use. Wire
sizing should be 2 #6, 1 #4, and 1 # 8.
I'm curious what Fretwell has to say.