JMV 6 Electric
Member
- Location
- Arizona
- Occupation
- electrician
Hello all. I'm running #3 thhn for a 125 amp pool sub panel. I was wondering if I could run #6 thhn for the ground and nuetral wires. Its a 90' run in underground electrical epvc.
Ground/ Neutral Wire Gauge for 125 amps
- Thread starter JMV 6 Electric
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LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
I can not (ethically) answer your question because #3, even copper, is not large enough for a 125 amp feeder.
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
You need to make the overcurrent protective device 100 amps assuming 75C. A number 6 would be fine for both the neutral and equipment grounding conductor if the load doesn't require more.
Do you mean the sub panel is rated for 125 amps?
As Dennis said, the answer depends on the OPD
ptonsparky
Tom
- Occupation
- EC - retired
- Location
- New Jersey
- Occupation
- Journeyman Electrician
T250.66 is not applicable for an EGC.
JMV 6 Electric
Member
- Location
- Arizona
- Occupation
- electrician
Yes the sub panel is rated for 125 amps.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
the panel can be 125 A bus as long as the feeder is protected by something rated to protect the #3 copper.
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