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question on electrical service panel upgrade

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question on electrical service panel upgrade Chris Friesen 11-13-2006
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Posted by Chris Friesen on November 13, 2006, 1:38 pm



I'm looking at upgrading my main service to 200A. I've got underground
service, and the existing service and meter base are rated for 200A.

However, the existing panel is mounted such that the highest breaker is
about 15" higher than current code allows.

Does anyone know how this is usually handled? Can I get grandfathered
in? I'm not sure how one would even go about lowering the panel given
that the wire for the existing circuits generally comes down from above
and is cut to fit the current height.

I'll be asking the local inspector, but they're closed today.

Thanks,

Chris

Real Goods Solar, Inc.
Posted by Pete C. on November 13, 2006, 2:05 pm


Chris Friesen wrote:
>
> I'm looking at upgrading my main service to 200A. I've got underground
> service, and the existing service and meter base are rated for 200A.
>
> However, the existing panel is mounted such that the highest breaker is
> about 15" higher than current code allows.
>
> Does anyone know how this is usually handled? Can I get grandfathered
> in? I'm not sure how one would even go about lowering the panel given
> that the wire for the existing circuits generally comes down from above
> and is cut to fit the current height.
>
> I'll be asking the local inspector, but they're closed today.
>
> Thanks,
>
> Chris

You install a good sized pull box above the new panel, at a suitable
height so the existing circuit wires will all comfortably reach inside
the pull box. You connect the pull box to the panel below with
relatively large conduit or conduits as appropriate. Inside the pull box
you pigtail all the existing circuits onto new wire from the new panel
below.

I've worked on several upgrades that were done this way and all were
passed by the inspectors with rave reviews.

Pete C.

Posted by zxcvbob on November 13, 2006, 4:09 pm


Chris Friesen wrote:
>
> I'm looking at upgrading my main service to 200A. I've got underground
> service, and the existing service and meter base are rated for 200A.
>
> However, the existing panel is mounted such that the highest breaker is
> about 15" higher than current code allows.
>
> Does anyone know how this is usually handled? Can I get grandfathered
> in? I'm not sure how one would even go about lowering the panel given
> that the wire for the existing circuits generally comes down from above
> and is cut to fit the current height.
>
> I'll be asking the local inspector, but they're closed today.
>
> Thanks,
>
> Chris


I think you'll have to put a junction box where the current panel is and
splice onto the wires. (Exception #5 in section 230-46.) Connect the new
panel to the J-box with a 2" metal conduit.

Bob

Posted by chuckster on November 13, 2006, 7:50 pm


If you live in New Jersey you would be covered under the Rehab Code,
and it would be OK to keep it at the 6'6" plus 15". The other solution
is to put the main breaker on the bottom of the panel. This is why
panels come with field installable labels.


zxcvbob wrote:
> Chris Friesen wrote:
> >
> > I'm looking at upgrading my main service to 200A. I've got underground
> > service, and the existing service and meter base are rated for 200A.
> >
> > However, the existing panel is mounted such that the highest breaker is
> > about 15" higher than current code allows.
> >
> > Does anyone know how this is usually handled? Can I get grandfathered
> > in? I'm not sure how one would even go about lowering the panel given
> > that the wire for the existing circuits generally comes down from above
> > and is cut to fit the current height.
> >
> > I'll be asking the local inspector, but they're closed today.
> >
> > Thanks,
> >
> > Chris
>
>
> I think you'll have to put a junction box where the current panel is and
> splice onto the wires. (Exception #5 in section 230-46.) Connect the new
> panel to the J-box with a 2" metal conduit.
>
> Bob


Posted by Chris Friesen on November 14, 2006, 12:56 am


chuckster wrote:
> If you live in New Jersey you would be covered under the Rehab Code,
> and it would be OK to keep it at the 6'6" plus 15". The other solution
> is to put the main breaker on the bottom of the panel. This is why
> panels come with field installable labels.

I'm in Canada. According to the simplified code book, the "highest
breaker" (not the main breaker) must be no higher than 67" from the floor.

The main breaker on the existing panel is at 82".

Guess I find out tomorrow what the inspector wants.

Chris

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