I'm trying to run a new AC circuit to a bedroom above my unfinished garage. I'm using metal clad romex ( flexible conduit ) to save time and make it easier to accomplish. Access to the breaker panel is on the wall outside of my garage. So what I'm doing is running the MC romex, exposed, across the top of my garage and then penetrating near the base of the wall in the second floor bedroom. I consulted an electrician who told me that it's not against code to run the MC romex through the garage in this manner, so that's not the issue I'm concerned with.
What I am concerned with is where the mc romex goes through the penetration through the drywall from the unfinished garage. I'm using this little breakout box as strain relief, but it doesn't seem right. My understand is that by code I need to use a bushing to secure the mc romex in the knockout hole, but what about at the drywall penetration.
Is there a bushing I should be using there?
Should I not be running mc romex through the inside of the wall in the first place?
(There's just something about this that looks off).