Multiwire and GFCI

[Boo Boo]

Hello Everyone,

I am bringing a 12-3 from a two pole 20 amp breaker to my bathroom, at the first oultlet I am connecting
the balck and pig tailed white to a GFCI protected thermostat for our warm floor and then
I am going out of the box with a 12-2 from the red and white to my next three GFCI receptacles. Is this
going to work? or I am going to have problems with the GFCI thermostat and receptacles not working properly.
Thank You!

 

[Dennis Alwon]

I have talked with the op and I re-opened the thread.

 

[Sierrasparky]

You have no issue as long as you keep the load side wires of the GFCI seperate from the other circuit for the thermostat. You will pigtail the nuetral before the thermostat and GFCI recepts.

 

[jumper]

You only need one GFCI receptacle, it can protect two regular ones on the load side.

 

[Sierrasparky]

You only need one GFCI receptacle, it can protect two regular ones on the load side.

Yup forgot that one. I never wire my bathrooms that way. If my bathroom circuit leaves that bath and goes to the next I place a GFCI in each and no load side recepts. I hate getting calls to reset a GFCI on my jobs cus the customer will expect it for free. However I love this stuff on other folks jobs as I now problem charging a small sevice call to reset especially after attemting to get the owner to reset himself over the phone with no lcuk. .:rant:

 

[Dennis Alwon]

Basically the neutrals on the load side of the GFCI are fine to tie together. Once you are on the load side of the GFCI the neutrals from the MWBC must be kept separate.

 

[jumper]

Yup forgot that one. I never wire my bathrooms that way. If my bathroom circuit leaves that bath and goes to the next I place a GFCI in each and no load side recepts. I hate getting calls to reset a GFCI on my jobs cus the customer will expect it for free. However I love this stuff on other folks jobs as I now problem charging a small sevice call to reset especially after attemting to get the owner to reset himself over the phone with no lcuk. .:rant:

I was thinking that OP was putting all three in one bathroom, otherwise I would put individual ones in each bathroom like you said. Personally I run a single circuit for each bathrooms receptacles if I can.

 

[Boo Boo]

Yes all three GFCI and the GFCI thermostat are in the same bathroom. Thank You!

 

[480sparky]

This will not work:

You either need to seperate your neutrals after the GFCIs:

or use a 2-pole GFCI breaker:

 

[Boo Boo]

Sorry if I was not very clear.....The warm floor has to have it's own dedicated circuit. and the other circuit for the receptacles. thank you1

 

[infinity]

Hello Everyone,

I am bringing a 12-3 from a two pole 20 amp breaker to my bathroom, at the first oultlet I am connecting
the balck and pig tailed white to a GFCI protected thermostat for our warm floor and then
I am going out of the box with a 12-2 from the red and white to my next three GFCI receptacles. Is this
going to work? or I am going to have problems with the GFCI thermostat and receptacles not working properly.
Thank You!

Yes, this will work as you've described it.