200 amp service upgrade.

[raydernation91]

I’m looking on some insight on the best way to remove the existing interior 100amp panel and relocate all branch circuits to a new meter main combo/200amp service on the outside of the house. Directly behind the old 100 amp panel. All Nm-b and most are long enough to terminate in the new panel. New to residential work, but I was thinking of a gutter or jbox above the new panel outside with a couple nipples from inside the house into the back of the box.

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[Elect117]

What you said works *

You could remove the guts of the panel, pipe through the wall to another box and splice inside the panel to refeed old loads. Use THWN/THHN type conductors in pipe from the exterior new service panel.

Maybe replace the interior panel with one that isolates the EGC and neutral, then replace breakers with AFCI / GFCI where required and refeed the feeder only through the wall. That would be the best way, then you keep the breaker spaces in the new panel for future. But this is going to be more expensive. Then you could add solar in the exterior panel or some EV chargers in the future. I would also advise, depending on cost, a 225A panelboard with 200A main or 225A main. That little extra would help a little on a future EV or solar calc.

 

[raydernation91]

What you said works *

You could remove the guts of the panel, pipe through the wall to another box and splice inside the panel to refeed old loads. Use THWN/THHN type conductors in pipe from the exterior new service panel.

Maybe replace the interior panel with one that isolates the EGC and neutral, then replace breakers with AFCI / GFCI where required and refeed the feeder only through the wall. That would be the best way, then you keep the breaker spaces in the new panel for future. But this is going to be more expensive. Then you could add solar in the exterior panel or some EV chargers in the future. I would also advise, depending on cost, a 225A panelboard with 200A main or 225A main. That little extra would help a little on a future EV or solar calc.

The customer doesn’t want the old panel or junction box inside. That’s why I was thinking of a way to bring all the romex outside legally.


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[marmathsen]

What are the meter height requirements for meters where you are? Would you be able to go directly into a meter with distribution and avoid junctioning the circuits? If not could you separate the meter and outdoor panel so the meter could be mounted per POCO reqs and the panel captures the home runs (may not be a great look though)?

Rob G
Seattle

 

[Seven-Delta-FortyOne]

That’s why I was thinking of a way to bring all the romex outside legally.

If that is your only concern with this installation, it’s not an issue.

NM is allowed to be stubbed through the wall to an exterior mounted panel. It’s been installed that way since NM was invented, numbering millions upon millions of installations, the NEC nowhere prohibits it, and the few jokers who like to claim it’s not allowed, need to align themselves with reality and find some other hobby to obsess over.