Originally Posted By: Bob Badger
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WOW, I thought I had done a good job with my second post, I guess not.
First when I respond it is generally from a "what is required" perspective.
You think the NEC is confusing
try to get agreement on what is the best/right way to wire things above and beyond code.
In short one house can use up to 6 switches or less grouped at one location to shut off all the power.
In the picture above one breaker shuts down the entire house, code compliant no more to be said.
Jerry mentioned pulling more than 100 amps from the breaker tabs, this lug kit in this panel prevent the installation of a breaker opposite it, and uses both 'sides' of each of the breaker tabs, used in this way you can get 200 amps off this panel.
Do I think it would be more convenient to have a main at the sub? Yeah most likely, but that has nothing to do with the NEC.
The members here bring up some good questions and some great discussion.
We regularly install one 225 to 400 amp feed to one to three 42 circuit panels (42 to 126 circuits) no main at these panels.
We do this as many office building have a lot of very lightly loaded circuits, and for breakers of this size 225 to 400 amp 3 phase prices depending on the AIC ratings and type of breaker can range from $300 to $2000 so cost is a big factor.
I gotta say something about "Sub" you all know Jerry is correct, the only sub panels are installed in submarines.
Panels are either service panels or 'load side equipment'.
I do say sub panel all the time but you will not and probably never will see "sub panel" in the NEC.
Bob (AKA iwire)
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