can GFCI breaker share the neutral? - Electrician Talk - Professional Electrical Contractors Forum
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Old 04-09-2017, 08:49 PM   #1
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Default can GFCI breaker share the neutral?

like there is a three phase panel,
there are three GFCI breakers in different phase

the question is can they share one neutral?
or we have to run separated neutral for each breaker?
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Old 04-09-2017, 08:59 PM   #2
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Need to run separate neutral for each. If you had a 2 pole GFCI breaker, those two hots would share one neutral.

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Old 04-09-2017, 09:31 PM   #3
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They will not work properly sharing nuetrals.

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Old 04-09-2017, 09:38 PM   #4
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I fail to understand why they *can't* share a neutral providing the three phases are balanced (aka same potential to neutral between the three of them). Please educate me on this one.
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Old 04-09-2017, 10:21 PM   #5
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Originally Posted by sparkiez View Post
I fail to understand why they *can't* share a neutral providing the three phases are balanced (aka same potential to neutral between the three of them). Please educate me on this one.
Because gfcis see a difference in current going out verses returning. Unless all phases and grounded conductors go through the same Ct you cannot share the grounded conductor.
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Old 04-10-2017, 12:28 AM   #6
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Seriously, no disrespect intended.
Don't they teach this during apprenticeship classes ??
I've heard some questions from our apprentice's that just make me think - what are they teaching these guys ?!
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Old 04-10-2017, 06:02 AM   #7
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Quote:
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Seriously, no disrespect intended.
Don't they teach this during apprenticeship classes ??
I've heard some questions from our apprentice's that just make me think - what are they teaching these guys ?!
It's never what they are teaching it's more what was being taught when the apprentice was actually listening and fully attentive when in class.

I've been in a shop with a few apprentices that attended all the same classes and what one picked up that the others knew nothing about was vastly different ends of the spectrum.
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Old 04-10-2017, 12:21 PM   #8
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Seriously, no disrespect intended.
Don't they teach this during apprenticeship classes ??
I've heard some questions from our apprentice's that just make me think - what are they teaching these guys ?!
Not really, they probably covered MWBC but never went deep into the science behind the concept.
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Old 04-10-2017, 12:25 PM   #9
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It's never what they are teaching it's more what was being taught when the apprentice was actually listening and fully attentive when in class.

I've been in a shop with a few apprentices that attended all the same classes and what one picked up that the others knew nothing about was vastly different ends of the spectrum.
This is true. Some do not know because they do not care. Some do not know because they can't grasp the concept quickly enough in the time allotted and some take whatever is taught at face value and move on.
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Old 04-11-2017, 07:37 PM   #10
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It is what it is. There were guys who couldn't figure out how wire a 3 way unless it was in pipe. I could do that regardless. On the other hand I can't bend pipe beyond a few basic bends. Don't care, because I hire those that can. Some of us ended up as owners, some talented journeymen, and others who I wouldn't hire to sweep the floor. Probably pretty similar to many apprentice groups. Those of us who were motivated, learned regardless.
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Old 04-11-2017, 07:41 PM   #11
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Not really, they probably covered MWBC but never went deep into the science behind the concept.
****ing nonunion apprenticeship. You have no ****ing Chance. Just quit.
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Old 04-11-2017, 08:07 PM   #12
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****ing nonunion apprenticeship. You have no ****ing Chance. Just quit.
Don't go driving members away!
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Old 04-11-2017, 08:59 PM   #13
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****ing nonunion apprenticeship. You have no ****ing Chance. Just quit.
Okay
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