Is it permissible to run #2 AL 4 conductor for a 24 KW generator with a 100 amp breaker in generator? Can the 83 percent rule be used if the generator is supplying power to the entire house? Or would it need to be upgraded to #1 AL. 4 conductor for the full 100 amps the breaker is supplying?
Generator Wiring
- Thread starter frofro19
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LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
It's a feeder, so it's okay to use the #2al on 100a genny breakers.
Ok, just to be clear the house service is a 200 amps with a 200 amp service rated ATS and will be going from the ATS with a #2AL to the generator.
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
I had to look this up in 310.12 and the 83% rules applies to feeders, as pointed out. For y our 4 C 2 AL feeder, the neutral can be smaller, but you many need to do a load calc. And certainly the EGC can be a 6 AWG Al.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
The generator breaker is what protects its feeder. I've done exactly this several times.
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