Thread: Electrical entrence on roof

Hi,

I came across an electrical entrance that was installed on the roof, going under a roof balcony. it is a contractor who renovated the building and I am not familiar with those kind of installation. I wanted to know is it safe?

Thank you

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Was there a service disconnect on the exterior anywhere? Where on the interior was the panel board located and how far does the SEC travel through the interior of the building before reaching the panel board?

Originally Posted by John Dirks Jr

Was there a service disconnect on the exterior anywhere? Where on the interior was the panel board located and how far does the SEC travel through the interior of the building before reaching the panel board?

Hello John,
There was no service disconnect on the exterior, the panel board was located on the last floor of the building and the SEC was traveling about 10 to 12 feet before reaching the panel board.

Originally Posted by Eli Smith

Hello John,
There was no service disconnect on the exterior, the panel board was located on the last floor of the building and the SEC was traveling about 10 to 12 feet before reaching the panel board.

Off the top of my head I'm not sure if the exterior routing across the roof is ok or not. However, the SEC should not travel the distance you listed without having a disconnect before it enters the building. And when a disconnect is on the exterior, the panel board then becomes a sub panel and the equipment grounds and neutrals should be separated. They should only be bonded at the exterior main disconnect.

Originally Posted by John Dirks Jr

Off the top of my head I'm not sure if the exterior routing across the roof is ok or not. However, the SEC should not travel the distance you listed without having a disconnect before it enters the building. And when a disconnect is on the exterior, the panel board then becomes a sub panel and the equipment grounds and neutrals should be separated. They should only be bonded at the exterior main disconnect.

Great info, thanks a lot!

Where was the actual connection at the meter? Did it come up the wall and over the roof?

Originally Posted by John Dirks Jr

Off the top of my head I'm not sure if the exterior routing across the roof is ok or not. However, the SEC should not travel the distance you listed without having a disconnect before it enters the building. And when a disconnect is on the exterior, the panel board then becomes a sub panel and the equipment grounds and neutrals should be separated. They should only be bonded at the exterior main disconnect.

I disagree. The SEC are in conduit. There is no distance limitations until it actually enters the house. The photos don't show any problems with the service.

Those look more like a feeder or branch circuit instead of a service.

Originally Posted by Lon Henderson

I disagree. The SEC are in conduit. There is no distance limitations until it actually enters the house. The photos don't show any problems with the service.

My point was about the distance of SEC run on the inside of the building. I think you misunderstood what I said.

Originally Posted by Lon Henderson

I disagree. The SEC are in conduit. There is no distance limitations until it actually enters the house. The photos don't show any problems with the service.

And it entered the hose as soon as it crossed under that deck. From that point on, the disconnect is required to be located 'close to the point of entrance' of the service entrance conductors, i.e., 'close to the point where it goes under the deck'.

Also, the conductors in those conduits need to be derated for being in conduit and on a roof.