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Electrical Inspections Contains discussions about electrical systems. This includes receptacles, panels, wiring, etc.

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  #1  
Old 3/18/13, 5:43 PM
Roy Drangstveit's Avatar
Roy Drangstveit Roy Drangstveit is offline
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Default Feeding subpanel

I inspected a house today that had a 100 amp subpanel in the basement being fed from the main service panel in the garage. The large wire coming from the sub panel is hanging loose in the main panel & has I think # 12 spliced & taped up (1 white & 1 Black)& then tapped into a double wide breaker. Any comments?
feeding-subpanel-misc-020.jpg

feeding-subpanel-misc-005.jpg

feeding-subpanel-misc-006.jpg

feeding-subpanel-misc-009.jpg

feeding-subpanel-misc-010.jpg



Sincerely,
Roy Drangstveit
Minnesota Valley Inspections LLC
Phone- 952-693-1777
Email- roy@mnvinspections.com
Website- www.mnvinspections.com
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  #2  
Old 3/18/13, 5:52 PM
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Default Re: Feeding subpanel

Now after looking closer at the pictures, it looks like the larger subpanel wires got to the double wide 100 amp breaker at the top left corner.
So I am still wondering about those loose spliced wires on the lower left side?



Sincerely,
Roy Drangstveit
Minnesota Valley Inspections LLC
Phone- 952-693-1777
Email- roy@mnvinspections.com
Website- www.mnvinspections.com
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  #3  
Old 3/19/13, 6:02 AM
Glenn Noska Glenn Noska is offline
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Default Re: Feeding subpanel

Quote:
Originally Posted by rdrangstveit View Post
Now after looking closer at the pictures, it looks like the larger subpanel wires got to the double wide 100 amp breaker at the top left corner.
With 75 degree C connections, aluminum wires not carrying an entire dwelling service have to be at least #1 AWG for 100A. A better answer is only possible if I get the guage and listing code from the outer jacket of the cable, and all conditions of use.

Quote:
Originally Posted by rdrangstveit View Post
So I am still wondering about those loose spliced wires on the lower left side?
The splice up in size was probably done for voltage drop or derating. As long as the double pole breaker is no bigger than 20A it's code. (But not my style. I prefer to label the wires "max 20A breaker, derating." Then land the larger wires directly on the breaker. If it's within the lugs listed capacity.)

This #12 white wire used as a hot is a code violation. It is not in one of the exceptions. But it is a very minor violation, not worth fixing. I would be less forgiving if he did the same thing anywhere else in that circuit.
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Old 3/19/13, 1:04 PM
Glenn Noska Glenn Noska is offline
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Default Re: Feeding subpanel

Hi Mr. Moderator. Did my earlier post get lost? Thx, glenn

Nazgul34@hotmail.com
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  #5  
Old 3/19/13, 5:11 PM
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Default Re: Feeding subpanel

Since it looks like #10 AWG on a 30 amp CB it fine depending on the connected load. As mentioned the re-identified white is NG.
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Old 3/19/13, 11:59 PM
Glenn Noska Glenn Noska is offline
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Default Re: Feeding subpanel

Thanks Robert. I couldn't read the breakers or see the wires clear enough on my iPad. I was going by Roy's statement that the wires were #12 for my 20A spec.
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  #7  
Old 3/20/13, 10:26 PM
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Default Re: Feeding subpanel

Those 2 wires do look bigger than the rest so maybe they are #10



Sincerely,
Roy Drangstveit
Minnesota Valley Inspections LLC
Phone- 952-693-1777
Email- roy@mnvinspections.com
Website- www.mnvinspections.com
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  #8  
Old 3/21/13, 12:27 PM
Paul W. Abernathy, CMI Paul W. Abernathy, CMI is offline
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Default Re: Feeding subpanel

Quote:
Originally Posted by Glenn Noska View Post
Hi Mr. Moderator. Did my earlier post get lost? Thx, glenn

Nazgul34@hotmail.com
There are no moderators here......



Paul Abernathy
Electrical Industry Associate


Disclaimer - All my posts on this forum are of my own personal opinion and in no way represent the opinions of any association, organization or affiliation. The voices in my head are mine and mine alone.
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