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cable clamp on meter base and service panel

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Subject Author Date
cable clamp on meter base and service panel mcelhane 08-04-2006
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Posted by on August 4, 2006, 3:22 pm
I am installing a meter base on a new house. The 4/0 cable from the
meter base to the 200 amp service panel will exit out the back of the
meter base, turn and go up for about a foot, and then enter into the
back of the service panel. I am planning on putting a cable clamp on
both the meter base and the service panel where the wire enters each
box. Usually I have seen these cable clamps installed such that the
clamping part is on the outside of the service panel or the meter base
and the threaded part is on the inside, but I was wondering...is there
really any harm in having the clamp part on the inside? It would make
things much easier to install. I could install the clamps before
mounting either box and then tighten on the cable from the inside of
each box. I can't seem to find any code problem with this - I just
haven't seen it done (but then again, I haven't seen that many)

Thanks for any responses


Posted by Pete C. on August 4, 2006, 4:10 pm
mcelhane@hiwaay.net wrote:
>
> I am installing a meter base on a new house. The 4/0 cable from the
> meter base to the 200 amp service panel will exit out the back of the
> meter base, turn and go up for about a foot, and then enter into the
> back of the service panel. I am planning on putting a cable clamp on
> both the meter base and the service panel where the wire enters each
> box. Usually I have seen these cable clamps installed such that the
> clamping part is on the outside of the service panel or the meter base
> and the threaded part is on the inside, but I was wondering...is there
> really any harm in having the clamp part on the inside? It would make
> things much easier to install. I could install the clamps before
> mounting either box and then tighten on the cable from the inside of
> each box. I can't seem to find any code problem with this - I just
> haven't seen it done (but then again, I haven't seen that many)
>
> Thanks for any responses

It would be much better if you can align the meter base and the panel so
you can use a rigid conduit nipple to connect directly between the two.

While there may not be a code restriction against installing the clamps
backwards I expect an inspector would question it. Best to check with
the inspector to see what they would prefer to see in that situation.

Pete C.

Posted by on August 4, 2006, 4:28 pm
wrote:

>It would be much better if you can align the meter base and the panel so
>you can use a rigid conduit nipple to connect directly between the two.
>
>While there may not be a code restriction against installing the clamps
>backwards I expect an inspector would question it. Best to check with
>the inspector to see what they would prefer to see in that situation.
>
>Pete C.

Since the utility usually bonds the neutral in the meter base a lot of
AHJs don't want a metal raceway between the meter and the service
disconnect
YMMV

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