Can mwbc feed GFCI receptacles?

[T.M.Haja Sahib]

Below is 480sparky's diagram Sahib refers to.

Sahib, don't use this method if you want a MWBC to run all the way to the last receptacle outlet. Instead, use the method shown in the other diagram with this noteable modification: Install a regular two pole circuit breaker. Install a GFCI receptacle at every receptacle location.

Again, Sahib, in this second diagram directly above these words, Install a regular two pole circuit breaker in place of the GFCI breakers. Install a GFCI receptacle at every receptacle location.

You will have a MWBC all the way to the last receptacle, AND, all of the GFCI receptacles will work perfectly.

The accuracy of your thinking is amazing.My salutations to you.Your second diagram solves the problem in favor of you except that it is very costly and my objection was based on the simple but less costly first diagram and in that case I am also right.

 

[al hildenbrand]

. . . my objection was based on the simple but less costly first diagram and in that case I am also right.

Right about what?

The circuit in the "first diagram" is a MWBC AND the two GFCI receptacles work perfectly. There is no tripping.

We are telling you, to a person, in this thread, that the shared neutral of the wiring between the breaker and the two GFCI receptacles makes the circuit fall under the rules governing MWBCs, . . . . doesn't matter that the down stream (load side) of the GFCI receptacles are two wire and don't share neutrals.

Because of that first section of shared neutral, the circuit is a MWBC. Period.

So, your "no" in the OP is still wrong.

 

[al hildenbrand]

Your second diagram solves the problem . . .

Every one of us is telling you, in no uncertain terms, there is no problem.

 

[al hildenbrand]

And at this juncture, I'm retiring for the night.

:bye:

 

[T.M.Haja Sahib]

the shared neutral of the wiring between the breaker and the two GFCI receptacles makes the circuit fall under the rules governing MWBCs, . . . . doesn't matter that the down stream (load side) of the GFCI receptacles are two wire and don't share neutrals.

Because of that first section of shared neutral, the circuit is a MWBC.

Unless you state some reference with clear picture of above stating it is a mwbc as a whole,I am not able to believe you are right.

 

[T.M.Haja Sahib]

Also after you have split into two separate circuits, it no longer meets the definition of a MWBC, but the NEC still treats it as one when applying the rules.

That NEC applies rules meant for mwbc and treats it as one is simply in error.Better way to state is:NEC applies rules meant for mwbc, even though it is not a mwbc as it does not meet the definition of a mwbc i.e it treats it as though it were an mwbc.
But still it does not mean it is a mwbc.

 

[iwire]

That NEC applies rules meant for mwbc and treats it as one is simply in error.Better way to state is:NEC applies rules meant for mwbc, even though it is not a mwbc as it does not meet the definition of a mwbc i.e it treats it as though it were an mwbc.
But still it does not mean it is a mwbc.

We will let that close out this thread.