Electrician Question

[TexasBob]

I enclosed a sunroom space between the garage and house to make my wife a gym space. I have run 4 8 gauge wires to a sub panel about 35 feet from my main panel. Will that support 50 amps or just 40? It really wont matter, just a curiosity. I am installing a couple of plugs, LED light circuit, and a 120v mini split unit so 40 is enough. I had the 8 gauge wire so I used it. Main question is confirming I need to install a second bus bar for a dedicated ground in the sub panel, correct? I don't bond the neutral bar to the panel either, correct?

[KenWood]

8 will be good for 50. You need a second ground bus attached to the back can. Take the green screw out of the neutral bus if installed.

[KenWood]

Let me clarify. If the 50 amp breaker's lugs are rated at 75 degree and sub panel lugs are rated 75 degree then you will be good with 8's. I say that strictly as a CYA. All of them are these days.

[Greenheadless]

If running Romex you are not good, you need a Special

[db@100]

Just use on a 40 amp breaker and separate the grounds and neutrals in the subpanel.

[Quackerbox]

8 will be good for 50. You need a second ground bus attached to the back can. Take the green screw out of the neutral bus if installed.

This

[WTucker]

What type of wire did you run? If it is NM (Romex), it’s only rated for 40 amps. Also, yes you need to separate your neutral and ground bars.

[TexasBob]

Thanks all. 8 gauge THHN spooled wire. Got the separate ground bar last night, I'll get it all done up today.