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can AFCI breaker share the neutral?

3K views 20 replies 11 participants last post by  dmxtothemax 
#1 ·
like there is a three phase panel,
there are three AFCI breakers in different phase

the question is can they share one neutral?
or we have to run separated neutral for each breaker?
 
#2 ·
Your profile says you're a commercial electrician. That means your licensed
and you should already know this stuff.
P&L
 
#13 ·
If ya find a Three phase AFCI breaker then ya can do it but .,, Honestly I dont ever see that kind of beast of three phase AFCI breaker used for commercal side.

if you need the AFCI protection on three phase pânel .,, you will need to get single or two pole AFCI breaker and follow that breaker instruction for which way you run the netual on that.
 
#15 ·
Someone correct me if I am wrong, but an AFCI employs ground fault protection, just as or similar to, a GFCI device. So for the same reasons you can't share the neutral on a GFCI, you can't on an AFCI.
 
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