Best way to connect meter base and panel back to back?

[lukel99]

I'm installing new electrical service to my garage, and wanted to get some feedback on my approach for the wall penetration. My wall is just PBR panel skin with horizontal steel girts on 2' centers.

Because the steel for the skin is so thin, I will end up with the distance from the back of the meter base to the back of the panel being about 2 inches after I put strut in. This means that I need a method of connection that's lower profile than standard for my 3 3/0 feeders. My current thought is a 2" rigid coupling through the wall penetration, attached to the box knockouts with chase *******. Is this code compliant, and is it a good approach? How have others approached this problem?

 

[lukel99]

As soon as I posted this, I had a eureka moment.

New plan is to use a 2" rigid conduit ****** in the correct length, lock nuts on either side of the knockout, and bushings to protect the wires where the threads are. Is this considered weatherproof enough for this application?

 

[Terry D]

As soon as I posted this, I had a eureka moment.

New plan is to use a 2" rigid conduit ****** in the correct length, lock nuts on either side of the knockout, and bushings to protect the wires where the threads are. Is this considered weatherproof enough for this application?

That is exactly what I was going to suggest

 

[wyliesdiesels]

As soon as I posted this, I had a eureka moment.

New plan is to use a 2" rigid conduit ****** in the correct length, lock nuts on either side of the knockout, and bushings to protect the wires where the threads are. Is this considered weatherproof enough for this application?

just make sure its below any live parts such as buss bars

 

[Chuckster in NJ]

TIP! "IF" you are using the concentric knock outs on the panel make sure to use a grounding bushing.

 

[wyliesdiesels]

TIP! "IF" you are using the concentric knock outs on the panel make sure to use a grounding bushing.

IIRC thats only required for 480v and up

 

[ycgoat]

IIRC thats only required for 480v and up

I do not have a code book here with me, but I believe it applies to services as well.

 

[lukel99]

TIP! "IF" you are using the concentric knock outs on the panel make sure to use a grounding bushing.

Will do. I didn't realize that conduit grounds are not sufficient in service applications. I've laid a decent amount of EMT for branch circuits, but this is my first service install so I didn't know about the fact that the physical conduit connection is not approved for bonding in service applications. Thanks for pointing me in this direction.

This article was a good read for me on this topic: https://www.jadelearning.com/blog/grounding-versus-bonding-part-1-qa/

 

[Chuckster in NJ]

IIRC thats only required for 480v and up

REALLY?……. Did I miss something OR misinterpreting the NEC wrong?

 

[Terry D]

Did I miss something OR misinterpreting the NEC wrong?

you are correct

 

[Chuckster in NJ]

just make sure its below any live parts such as buss bars

Really? Am I reading this illustration wrong?

 

[wyliesdiesels]

REALLY?……. Did I miss something OR misinterpreting the NEC wrong?

nope you didnt. i wasnt paying attention. thought this was a branch feeder.

Really? Am I reading this illustration wrong?

nope.