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Old 01-08-2011, 05:17 PM   #1
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As I posted before I'm in a multi family house and wired up a sub panel to split the power from my generator to both boxes in the event of an outage, looking at it again today i was wondering, do I need to bond the neutral bar to the panel? The panel does nothing but distribute power and because of my interlocks could not be used as a legitimate sub panel because the only time it is energized is when the genny is running. I put a ground bar in when I installed it and the neutral bar is not bonded right now.

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Old 01-08-2011, 05:19 PM   #2
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As I posted before I'm in a multi family house and wired up a sub panel to split the power from my generator to both boxes in the event of an outage, looking at it again today i was wondering, do I need to bond the neutral bar to the panel? The panel does nothing but distribute power and because of my interlocks could not be used as a legitimate sub panel because the only time it is energized is when the genny is running. I put a ground bar in when I installed it and the neutral bar is not bonded right now.
Unless you are an electrician, You should not be performing any electrical work on a multi-family house.

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Old 01-08-2011, 05:21 PM   #3
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Do you want to read me the riot act or help me with my question?
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Old 01-08-2011, 05:23 PM   #4
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Do you want to read me the riot act or help me with my question?
First i want to inform you of the law, and the liability you are bringing on to yourself! No i will not help you perform illegal work. Call an electrician! Best of luck
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Old 01-08-2011, 05:27 PM   #5
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first of all: I am aware of the law, Second: this work IS permitted.
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Old 01-08-2011, 05:34 PM   #6
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first of all: I am aware of the law, Second: this work IS permitted.
So in Ma they allow non electrician to perform electrical work on multi-family houses? I always thought Ma was one of the tougher states as far as what people could do!
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Old 01-08-2011, 05:37 PM   #7
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So in Ma they allow non electrician to perform electrical work on multi-family houses? I always thought Ma was one of the tougher states as far as what people could do!
Are you located in MA ? Are you aware of the specific laws in this state ?
Owner occupied is allowed in MA
Subject to local restrictions if any
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Old 01-08-2011, 05:40 PM   #8
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Are you located in MA ? Are you aware of the specific laws in this state ?
Owner occupied is allowed in MA
Subject to local restrictions if any
Nope, Even on multi-family houses?

I can understand single family but not multi family!
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Old 01-08-2011, 05:40 PM   #9
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Are you located in MA ? Are you aware of the specific laws in this state ?
Owner occupied is allowed in MA
Subject to local restrictions if any

Thank you Dave, Yes it is up to the town and the situation, I am completely owner occupied, Parents downstairs and the wife and I upstairs, all names on the deed THAT is how I obtained the permit.


So now that you know all the facts........ Do you want to help me?'

Edit: I am not an electrician but I am confident enough in my skills to know I am not going to do something that will burn my house down, I was asking a simple question that I could not find guidance on in the NEC, you can either continue to piss and moan because I am not giving my money to an electrician or you could help me so I can have this inspected.

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Old 01-08-2011, 05:44 PM   #10
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Nope, Even on multi-family houses?

I can understand single family but not multi family!
Yes, multi-family 1-4 families
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Old 01-08-2011, 05:46 PM   #11
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Yes, multi-family 1-4 familes
Thanks for the info was not aware of that. My apologies to the OP!
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Old 01-08-2011, 06:05 PM   #12
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Subpanels Do not have a n+g bond.
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Old 01-08-2011, 06:08 PM   #13
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Subpanels Do not have a n+g bond.
Thank you Bob. I wasn't sure if that would apply to my situation.
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Old 01-08-2011, 08:48 PM   #14
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The neutral to ground bonding should already be in place internally in the generator. THAT is the source, and the bonding is to ensure a reliable return path to the source.

No further bonding downstream should be necessary.
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Old 01-08-2011, 10:18 PM   #15
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Note that if the transfer switch or interlock does not switch the neutral between generator and real main panel then neutral and ground will remain bonded at the real main panel which from the point of view of the generator is a random point downstream.

Then what has been done is to use the aforementioned as the single and "real" grounding point for the neutral and to unbond the neutral from the generator frame. Meanwhile the generator frame is to be bonded to the house ground system.

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Last edited by AllanJ; 01-08-2011 at 10:21 PM.
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