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Joined: Mar 2004
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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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Joined: Jan 2003
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Bob Badger
Construction & Maintenance Electrician
Massachusetts
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Joined: Jan 2005
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it is acceptable so long as the point of attachment sustains a 3' clearance above roof for the roofers sake
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Joined: Jul 2004
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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
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Joined: Apr 2004
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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]](https://www.electrical-contractor.net/ubb/biggrin.gif) - - - - - - - - - - - - - - - - - - - - - - - - - - - Charlie Eldridge, Indianapolis, Utility Power Guy
Charlie Eldridge, Indianapolis Utility Power Guy
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Joined: Jul 2004
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What is the NESC rule for height over a roof?
Greg Fretwell
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Joined: Mar 2004
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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.
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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]](https://www.electrical-contractor.net/Forum/Images/roof_clearance.jpg)
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Joined: Jul 2004
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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
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Joined: Jan 2005
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Somehow the "before" and "after shots got reversed ![[Linked Image]](https://www.electrical-contractor.net/ubb/smile.gif) . 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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