Wondering if anyone knows anything wrong with this installation according to code? I'm about to do a job on a storage building that is approximately 225 ft. It is divided up into individual units. There is a 200 amp. service on one end of it. I am planning on running a sub panel approx. 200ft. away on the same side as the "main panel". I will be running 3/4" conduit with 3 #6THHN and 1 # 10 for ground. I will put a 50 or 60 amp. breaker ahead of it. Out of the subpanel, I will go into one of the storage units to supply lights and a couple recpt.. I will put the recpt. on GFI . All will be run in conduit. I guess my main question is, at that distance, is there anything that says I can't put the panel on the inside instead of the outside? The neutral and grounds will be separated in the subpanel. Just trying to check all the angles before I start the job. Thanks for the input...

Sparky,

This sounds a little like a tenant/owner place. If so will the tenants have access to their overcurrent protection as per 240-24(b)? I am still using the 1999 NEC.

Harold, yes there will be breakers either inside the "unit" or directly outside the "unit". I am thinking it will be better on the outside, even if there is not anything wrong according to Code for it being on the inside. If something actually goes wrong while the tenant is not there and the panel is on the inside, it means that the locks on the door will have to be cut to get access to the panel or "run" 200 ft. to the Main panel.