Arc Fault Circuit Interrupter

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MWBC AFCI

MWBC AFCI

VU2351 said:
Can a AFCI work with 3 home runs and 1 shared neutral?
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No. Coupling in the cable will be a factor and non-code compliant even with extending one BC by using an AFCI receptacle. Avoid using MWBC circuits with today's code requirements. rbj
 
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VU2351 said:
Can a AFCI work with 3 home runs and 1 shared neutral?
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So, you've got a three phase supply? 208 / 120?

If the panel is a GE panel, the single pole AFCI (MOD3) can be used with a handle tie and the shared neutral connected to only one of the breakers on a single phase 240 / 120. I would just bet that GE tech will say that a three-pole handle tie can be used on 208 / 120.

GE's AFCI arc discrimination hardware solution is the only, of all the AFCI breakers, that has a chance of working, and I think it would be worth a call to them to verify.
 
GE archy's , for reasons i don't quite grasp or are unclear , operate differently , and have resulted in far less callbacks for us.

That, and they simply take up less room >>

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Be thankful for 408.56 ex.

~RJ~
 
romex jockey said:
GE archy's , for reasons i don't quite grasp or are unclear , operate differently , and have resulted in far less callbacks for us.
Click to expand...
The GE circuitry that provides the arc fault detection and discrimination does not do any ground fault detection. The GE circuitry is PURELY arc fault detection and nothing else. The circuitry is designed to provide the arc fault protection by only examining the electrical activity on the "hot" conductor. The LOAD neutral isn't required for the GE AFCI to provide AFCI protection.
 
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