Nec service conductors clearance

[Tanelectrical]

Sounds like you are doing your due diligence. The only one left is the City Inspector, give him a call.

Tried calling him today it’s Friday probably took the day off. Il give him a buzz on Monday again

 

[Fred B]

There are clearances not only over roof (NEC 230.9) but also minimum clearance requirements as it crosses over driveways roadways and yards that apply as well. These additional clearances at times force the minimum above roof to increase to get the min clearance across the space.
(NEC 230.24(B))
also consider:
NEC 230.26 Point of Attachment.
The point of attachment of the overhead service conductors to a building or other structure shall provide the minimum clearances as specified in 230.9 and 230.24. In no case shall this point of attachment be less than 3.0 m (10 ft) above finished grade.

 

[Tanelectrical]

There are clearances not only over roof (NEC 230.9) but also minimum clearance requirements as it crosses over driveways roadways and yards that apply as well. These additional clearances at times force the minimum above roof to increase to get the min clearance across the space.
(NEC 230.24(B))
also consider:
NEC 230.26 Point of Attachment.
The point of attachment of the overhead service conductors to a building or other structure shall provide the minimum clearances as specified in 230.9 and 230.24. In no case shall this point of attachment be less than 3.0 m (10 ft) above finished grade.

I am way above the 10ft requirement off finished grade my problem is where my service mast comes out of the roof that roof is lower than the main roof on the house and it crosses the yard at Slight angle towards the pole but on its way to the about 6 feet from the mast it comes close to the edge of the main roof to the house then continues over the corner of the roof for about 3 feet rn I am at 3 feet 6 inches from the edge of the roof to the top of the wire but it comes with about a foot or two off the edge of the roof my ground clearance is at about 13 feet rn my wires do not go over a driveway or a road way

 

[jap]

My local utility has a drawing and it just says 3 foot clearance from roof I talked to the local utility engineer who was at the job on Tuesday and they told me my clearances looked good from what he remembered. Hopefully the city inspector passes it I am over three feet above the roof but I am less than three feet from the edge of the roof to the wire

The vertical clearance above the roof level shall be maintained for a distance not less than 900 mm (3 ft) in all directions from the edge of the roof.

The wording on this throws me off also.

The whole point of the rule is to keep the conductors a certain height above the roof once the conductors penetrate the vertical boundary of the edge of the roof.

Wouldn't that all depend on which way you're looking at it from?

If you're standing on the roof in the middle of the house, and, start checking the height of the overhead conductors with a 3 foot stick anywhere on the roof heading towards the roofs edge from the middle, and, at no point heading towards the edge of the roof within 3 feet of the edge of the roof is below the height of your 3' stick, I would say your clearance is good.

But,

In that same scenario, If your overhead conductors drop below the 3' height of your stick, and you're not yet to the 3' mark from the edge of the roof, then you're in violation because the conductors are getting too close to the roof.

On the other hand, If I'm on my ladder leaned up against the edge of the roof, and my overhead conductors are lower than my 3' stick at say 2 ft 6" say from the edge of the roof in, am I in violation? I think not, yet the rule says that the vertical distance must be maintained "not less than 3' in all directions from the edge of the roof"

The wording seems somewhat confusing.

JAP>

 

[Tanelectrical]

The vertical clearance above the roof level shall be maintained for a distance not less than 900 mm (3 ft) in all directions from the edge of the roof.

The wording on this throws me off also.

The whole point of the rule is to keep the conductors a certain height above the roof once the conductors penetrate the vertical boundary of the edge of the roof.

Wouldn't that all depend on which way you're looking at it from?

If you're standing on the roof in the middle of the house, and, start checking the height of the overhead conductors with a 3 foot stick anywhere on the roof heading towards the roofs edge from the middle, and, at no point heading towards the edge of the roof within 3 feet of the edge of the roof is below the height of your 3' stick, I would say your clearance is good.

But,

In that same scenario, If your overhead conductors drop below the 3' height of your stick, and you're not yet to the 3' mark from the edge of the roof, then you're in violation because the conductors are getting too close to the roof.

On the other hand, If I'm on my ladder leaned up against the edge of the roof, and my overhead conductors are lower than my 3' stick at say 2 ft 6" say from the edge of the roof in, am I in violation? I think not, yet the rule says that the vertical distance must be maintained "not less than 3' in all directions from the edge of the roof"

The wording seems somewhat confusing.

JAP>

But it says that there is a few exceptions I believe it’s exception number two is you are allowed 3 feet clearance form a roof with a 4 /12 pitch or greater but it does not say if that three foot rule from the edge still applies or not talked to my locall utility and they said my clearance looked fine I’m about a 3 1/2 clearance vertical of the roof talked to the local inspector they told me it’s just vertical and if the utility likes it I should be good

 

[jap]

But it says that there is a few exceptions I believe it’s exception number two is you are allowed 3 feet clearance form a roof with a 4 /12 pitch or greater but it does not say if that three foot rule from the edge still applies or not talked to my locall utility and they said my clearance looked fine I’m about a 3 1/2 clearance vertical of the roof talked to the local inspector they told me i

All the exception does is allow a reduction of the clearance.
I would say that would not affect the requirements of the 3 foot rule from the edge.

JAP>

 

[jap]

I'm starting to rethink this.
The rule states "in all directions" from the edge of the roof.
That to me would mean the height would need to be maintained even 3' beyond the outside edge of the roof where there is no roof.

JAP>

 

[Tanelectrical]

Hmm I must have missed that well I will have rethink that but 18 inches is allowed 4 feet past the service conductors right ?

 

[jap]

Hmm I must have missed that well I will have rethink that but 18 inches is allowed 4 feet past the service conductors right ?

I think exception #3 would come into play for even more clarification of the "overhanging" portion of the roof.


JAP>