disconnect location subpanel

[difowler44]

An Electrician friend of mine and I were bidding a job together and had a disagreement. We were talking about how we would do a subpanel service on a residential detached bldg garage about 60feet from the main house.

He said the disconnect for the out bldg should be mounted on the exterior of the main house. Then you could use a main lug subpanel (as apposed to main breaker) for the out bldg. I have not read up on this one yet to find the written proof in the code book.

For a 100amp subpanel I would start the circuit on a 100amp breaker from the main house, run the wires to the out bldg, and put a disconnect either on the outside or the inside exterior wall of the out bldg. This is the area where the power would need to be disconnected in an emergency. You have a disconnect at the main house on the main panel box 100amp breaker. My friend said it wouldn't pass inspection. I couldn't be wrong on this one?

 

[Jim W in Tampa]

An Electrician friend of mine and I were bidding a job together and had a disagreement. We were talking about how we would do a subpanel service on a residential detached bldg garage about 60feet from the main house.

He said the disconnect for the out bldg should be mounted on the exterior of the main house. Then you could use a main lug subpanel (as apposed to main breaker) for the out bldg. I have not read up on this one yet to find the written proof in the code book.

For a 100amp subpanel I would start the circuit on a 100amp breaker from the main house, run the wires to the out bldg, and put a disconnect either on the outside or the inside exterior wall of the out bldg. This is the area where the power would need to be disconnected in an emergency. You have a disconnect at the main house on the main panel box 100amp breaker. My friend said it wouldn't pass inspection. I couldn't be wrong on this one?

You have it correct

 

[augie47]

Jim, of course, and you are correct.
Tell your friend to look at 225.32
(It might be a good idea to take a glance at 250.32 also)

 

[difowler44]

I don't know where he comes up with some of his rules. I see an exception that contradicts another thing he said. I don't do alot of commercial outdoor lighting. I did do some work on a par 3 golf course. My friend said that a disconnect should have been installed on every light post on the course.

I see on 225.32 exception No.3 For towers or poles used as lighting standards, the disconecting means shall be permitted to be located elsewhere on the premises.

lighting standards? a light pole, right?

 

[jwjrw]

I don't know where he comes up with some of his rules. I see an exception that contradicts another thing he said. I don't do alot of commercial outdoor lighting. I did do some work on a par 3 golf course. My friend said that a disconnect should have been installed on every light post on the course.

I see on 225.32 exception No.3 For towers or poles used as lighting standards, the disconecting means shall be permitted to be located elsewhere on the premises.

lighting standards? a light pole, right?

Just a thought.....He could of done a few jobs that the same EE drew the plans. Some job specs might include things that are not required by the NEC and he assumed it was code to do it that way.