GFCI kitchen circuits on a shared neutral

[lclev]

We have a debate going - two inspectors say it won't and two electritions say it will. One says he has been doing it for years.

So I need to know some opinions about if GFCI protected recepticle circuits in a residential kitchen work with a shared neutral.

I have alway been told they won't.

 

[infinity]

They can share a neutral on the line side of the devices. This would be equivalent to them sharing the neutral where the circuits originate at the panel.

 

[iwire]

Yes and No. :wink:

Breakers.

With single pole GFCI breakers you must use a dedicated grounded conductor.

With a two pole GFCI breaker you can use a common neutral.

Receptacles.

You can supply a GFCI receptacle with a common neutral but the load side if used must have a dedicated grounded conductor.

 

[bikeindy]

Your post is not clear to the point of which type of device you will use 1 a GFCI breaker or 2 GFCI receptacles. If you use the receptacles they will work on a circuit with a shared "neutral" but the breakers will not. the reason is the electronics of the device and how the are operating.

 

[Jim W in Tampa]

Yes and No. :wink:

Breakers.

With single pole GFCI breakers you must use a dedicated grounded conductor.

With a two pole GFCI breaker you can use a common neutral.

Receptacles.

You can supply a GFCI receptacle with a common neutral but the load side if used must have a dedicated grounded conductor.

Your right Bob ,but now tell them the cost of a 2 pole gfci breaker amd the down side of if it trips.

 

[tonyi]

I multiwired a countertop corner in my kitchen. One GFI rcpt on blk the other on red. Works fine.

The devices are only aware of what's going on downstream from them. They'll never see the neutral current from the other side of the multiwire.

 

[brother]

The devices are only aware of what's going on downstream from them. They'll never see the neutral current from the other side of the multiwire.

this is correct. I live in a unit where they did share neutrals on the load side, and sometimes when the 'compressor' on the frig kicks on, the gfci pops. :x I have to get up and reset it. I think this should be against code, its just bad wiring in my opinion.
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