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Old 06-12-2010, 08:19 AM   #1
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Are there any issues with using a GFCI breaker (not outlet) on a multiple branch circuit? I have several other outlets and lights along with a fan above a shower that requires a GFCI circuit. Thank ya!

Shane

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Old 06-12-2010, 08:33 AM   #2
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Could you define your "multiple branch circuit'? If you are asking about a circuit that just feeds multiple lights and receptacles there is no problem. If you are asking about use on a multi-wire branch circuit, there are issues.

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Old 06-12-2010, 09:18 AM   #3
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Could you define your "multiple branch circuit'? If you are asking about a circuit that just feeds multiple lights and receptacles there is no problem. If you are asking about use on a multi-wire branch circuit, there are issues.
It is one 14-2 going to a junction box and then 3 14-2 coming out. One goes to the fan, one to a switch for lights and one to a row of outlets.
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Old 06-12-2010, 09:23 AM   #4
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No problem with that at all.

But none of those outlets are allowed to be in the bathroom.
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Old 06-12-2010, 09:32 AM   #5
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Nope, none of them are. I ran a dedicated circuit for bathroom outlets w/ a gfci outlet. Thanks! You guys are the best.

Shane
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Old 06-12-2010, 09:52 AM   #6
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Just to clarify
A multiple wire branch circuit (MWBC) is 2 hots, a shared neutral & ground
Its 2 circuits but considered one due to the shared neutral/ground
So to use a GFCI breaker you must use a 2 pole (240v) GFCI breaker
Using one reg breaker & GFCI breaker will cause issues

What you are describing is not a MWBC
So describing it as a multi-branch circuit is a little off on terminology

A bathroom circuit can supply outlets in multiple bathrooms
OR
All lights & outlets in ONE bathroom
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Old 06-12-2010, 10:12 AM   #7
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Quote:
Originally Posted by Scuba_Dave View Post
Just to clarify
A multiple wire branch circuit (MWBC) is 2 hots, a shared neutral & ground
Its 2 circuits but considered one due to the shared neutral/ground
So to use a GFCI breaker you must use a 2 pole (240v) GFCI breaker
Using one reg breaker & GFCI breaker will cause issues

What you are describing is not a MWBC
So describing it as a multi-branch circuit is a little off on terminology

A bathroom circuit can supply outlets in multiple bathrooms
OR
All lights & outlets in ONE bathroom
Gotcha, sorry about the wrong terminology.
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Old 06-12-2010, 10:15 AM   #8
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Originally Posted by JakAHearts View Post
Gotcha, sorry about the wrong terminology.
Don't let it happen again!!!

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