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#91378 - 01/13/05 02:17 PM riser  
tomselectrc  Offline
Joined: Mar 2004
Posts: 49
warren mi us
IS IT acsecptable for the power company service line to run over liveable dwelling?If it is how far off the roof does it need to be?

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#91379 - 01/13/05 02:23 PM Re: riser  
Happy Birthday iwire  Offline
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Yes, 230.24(A)

Bob Badger
Construction & Maintenance Electrician

#91380 - 01/28/05 02:58 PM Re: riser  
dabest  Offline
Junior Member
Joined: Jan 2005
Posts: 5
it is acceptable so long as the point of attachment sustains a 3' clearance above roof for the roofers sake

#91381 - 01/28/05 03:52 PM Re: riser  
gfretwell  Online Content

Joined: Jul 2004
Posts: 9,099
That 3' is only "final conductor span" leading to the service head. Normally the clearance is 8' above the roof for a distance of 3' beyond the roof edge.

Greg Fretwell

#91382 - 01/29/05 02:02 PM Re: riser  
CharlieE  Offline
Joined: Apr 2004
Posts: 200
Actually, the NESC is the Code that covers the serving electric utility’s service drop clearances. The 3 ft beyond the roof’s edge is not in the NESC. [Linked Image]

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Charlie Eldridge, Indianapolis, Utility Power Guy

Charlie Eldridge, Indianapolis Utility Power Guy

#91383 - 01/29/05 10:24 PM Re: riser  
gfretwell  Online Content

Joined: Jul 2004
Posts: 9,099
What is the NESC rule for height over a roof?

Greg Fretwell

#91384 - 01/29/05 11:19 PM Re: riser  
BigB  Offline
Joined: Mar 2004
Posts: 719
Tucson, AZ USA
It's up to the POCO. Here they won't allow the eight foot riser if it's more than 3 feet from the edge because they don't allow the line crews to use a ladder on the roof for safety reasons. So they specify five feet, no matter how much of the drop extends over the roof.

#91385 - 01/30/05 10:23 PM Re: riser  
Admin  Offline

Joined: Oct 2000
Posts: 3,447
These are "before and after" photos of one result of a service change I did. As you can see, the service drop has a lot more clearance than it previously had.

So, yes, you can run these conductors over a dwelling, but you do need 36" clearance. While I believe that this is covered in NEC 230-24, your local utility is likely to have a different rule.

- renosteinke
[Linked Image]

#91386 - 01/30/05 10:39 PM Re: riser  
gfretwell  Online Content

Joined: Jul 2004
Posts: 9,099
If this drop is not going to the building in question I think 230.24 says it has to be 8 feet above the roof, out to a distance of 3 feet from the roof's edge. The exception (4) is for the final span of the drop that connects to the riser on the building served

Greg Fretwell

#91387 - 02/01/05 09:37 PM Re: riser  
renosteinke  Offline
Cat Servant
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
Somehow the "before" and "after shots got reversed [Linked Image]. I hate it when that happens!
I will admit that 230 also references the pitch of the roof; this roof is right on the line, and I let the inspector decide. Part of this was based upon the heigth of the riser on the building getting new service; see photos added to "flagpoles" in "photos submitted for discussion."

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