This article was posted 08/15/2012 and is most likely outdated.

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Applying 1-pole Combination AFCIs to Shared Neutral Circuits

Combination Arc Fault Circuit Interrupters
Application Guidelines
Applying 1-pole Combination AFCIs to Shared Neutral Circuits

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Until now, using a shared neutral (multiwire branch circuits) on arc fault protection circuits required the use of 2-pole AFCI breakers, since the AFCI circuitry uses a ground fault CT to help it detect arcs. But with GE’s newly developed combination AFCI technology, no ground fault CT is required, so shared neutral circuits can be used with two 1-pole AFCIs connected together with a handle tie.

Click here to view this Electrical Distribution publication from GE which explains these application guidelines and provides example diagrams.

 

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Comments

  • I guess I am still in the dark. If you need to trip both poles anyway, what is the advantage of two single-pole AFCI breakers joined with a handle tie over a two-pole AFCI breaker?

    Bob Hoyer  August 17 2012, 4:37 pm EDT

    • Reply from: MikeHolt   August 17 2012, 4:46 pm EDT
    None, they both meet the NEC requirement for multiwire circuits.
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