Help with a quick question

[bkelly]

On a new 100a residential service, MLO panel, can you reverse feed a 100a 2pole breaker as the main? I don't believe you can but i can't seem to find the answer

 

[charlie]

. . . can you reverse feed a 100 a 2 pole breaker as the main? . .

Yes, as long as the main is labeled and fastened to the panelboard. :smile:

 

[bkelly]

what do you mean fastened? a mech device that holds it in place? Not sure??

 

[A-F-E]

Yes look at 408.36 (F) in the NEC

 

[bkelly]

Got it, thanks for the help!!

 

[charlie]

408.36(D) Back-Fed Devices. Plug-in-type overcurrent protection devices or plug-in type main lug assemblies that are backfed and used to terminate field-installed ungrounded supply conductors shall be secured in place by an additional fastener that requires other than a pull to release the device from the mounting means on the panel.

 

[al hildenbrand]

Go to the catalog for the manufacturer of the panel and look under accessories. . .sometimes it gets real specific as to what the "fastener" is that will work for that make and model.

 

[Local Electrician]

As to the OP yes I do it all the time.

I was going to post a thread similar to this.
With the new 310.15 -b (6) rule.

I have to replace a 150 amp meter base combo feed through panel.
As you may know they are rare in my area. So I would like to install a 200 amp feed through panel.
I will use 2/0 cu. from the meter to the 200 amp feed through panel.
There is a breaker for an ac/heat pump on the outside panel.

Then the existing inside panel has a 150 amp main breaker.

So my question is, would I still be able to use the 2/0 copper to the 150 amp main?
The panel would be protected from overload by the 150.
The 2/0 it seems also would be protected from overload by the 150.

 

[brian john]

Welcome to the site with 10 post you have not learned yet, but there may be quick questions but there are seldom quick answers to those questions.