Another guy finishing an attached garage

[SmokingDeuz]

Hey guys, I am trying to upgrade my shop a little.
I have a 3 stall, attached garage that was built in '91. It has one GF outlet that is on the same circuits as the bathrooms......
My plan is to install a subpanel in the garage. I have 200amp service to the house, and I am thinking 60-70amps to the garage is good enough.

My question, do I need to run my feed (3 conductor from main panel to subpanel) in conduit, if it is going through the walls?

Can my panel be placed on the same wall as house, or does it have to be on an outside wall?

Thank you guys for your time

 

[exranger06]

1. You need a 4-wire feed to the subpanel, not 3-wire. You need 2 hots, a neutral, and a separate ground wire.

2. No, you don't need conduit. You can use SER type cable and install it basically the same way you would install NM-b (Romex) wire, as long as it's protected from physical damage (again, follow the same rules as Romex).

3. You're going to want to install it on an outside wall. Installing it on the shared wall is going to mess up the fire rating of the wall. The NEC doesn't mention anything about this as far as I know, but building codes do.

 

[wyliesdiesels]

Male sure the neutral bar is isolated in the subpanel.

 

[Stuart in MN]

3. You're going to want to install it on an outside wall. Installing it on the shared wall is going to mess up the fire rating of the wall. The NEC doesn't mention anything about this as far as I know, but building codes do.

He didn't specify if the subpanel will be flush mount or surface mount - if it's flush mounted, yes that will create a hole in a wall that needs to be fire rated but if it's surface mount it won't (the cable penetration will need to be sealed.)