I did some searches within this group on this subject, and thought I would let
you all comment on my particular installation.
I am upgrading an existing 100 amp service. It consists of a 100 amp "meter/main
combination box on the outside, and a subpanel (load center) inside the house
fed by long
I want to add a new 100amp subpanel. The new panel will go into the garage, and
feed a shop
there. There is an extra breaker already in the meter/main panel, so it has
1x100 amp breaker
(x2 120 volt circuits), and space for one more (two breaker positions total).
However, as I
understand it, I would have to downgrade to 2x50amp breakers to feed both
The city inspector told me to upgrade the outdoor meter/main to one of the new
meter/main/load centers, and indeed, that seems to be all they have at the local
However, that does not seem to me to be the way to go, for several reasons:
1. That would mean all of the new shop breakers would be outside, a considerable
walk into the rain to reset them.
2. The very much larger size of the combo units involves much more destruction
of the outside
3. Using a subpanel allows me to get all the garage wiring done at my own pace.
combo would mean doing all the final connections to the panel in a panic because
house power is off due to the main disconnect.
What it appears to come down to is finding the right meter/main panel. Ideally I
would like to find
a meter/main that fits into the present 100amp meter main format, at 18"x12"