InterNACHI


Go Back   InterNACHI Inspection Forum > Specific Inspection Topics > Electrical Inspections

Notices

Electrical Inspections Contains discussions about electrical systems. This includes receptacles, panels, wiring, etc.

 
Reply
 
LinkBack Thread Tools
  #1  
Old 2/16/08, 7:10 PM
rbrady's Avatar
rbrady rbrady is offline
Active Poster
 
Join Date: Feb 2007
Location: Eureka, CA
Posts: 619
Please Note: rbrady is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Low service over a roof

It looks like this service wire was recently replaced. It had to have been done by the utility company. This can't be OK, can it.
Without quoting code, what is the issue/risk? The only thing I can think of is that it would be a hazard for anyone working on the roof, which is enough of an issue.

low-service-over-roof-service2.jpg

low-service-over-roof-service.jpg
Reply With Quote
  #2  
Old 2/16/08, 7:28 PM
Bob Elliott's Avatar
Bob Elliott Bob Elliott is offline
InterNACHI Member
 
Join Date: Aug 2006
Location: Chicago
Posts: 21,916
Default Re: Low service over a roof

danger to a roofer for instance.
call the utility company.
18 inch min
I wonder if the mast should have been moved to a better location seeing that picture.
Reply With Quote
  #3  
Old 2/16/08, 8:19 PM
Speedy Petey Speedy Petey is offline
Unmoderated Guest
 
Join Date: Jul 2006
Posts: 1,297
Please Note: Speedy Petey is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

That does not look very new to me. That mast for instance is pretty old looking.
Maybe you are talking about just the drop from the pole?

This is not typically the responsibility of the POCO. The service location and clearances are the installer's responsibility.

A) That mast is NOT in the right spot. It should have never been placed so the the service drop crosses that much of the roof.

B) Even if it were tall enough to clear the roof better there would be no way to back guy it.

Safety issue? Yes.
It is a code violation so IMO it is inherently not safe. How "not safe" is a judgment call.

Solution? Who knows.
If it were me selling I'd say too bad. It's there and it's done and I have a CO.
If I were the buyer I am not sure what legal, or other, grounds I would have to bargain.
I think it depends on how motivated the seller is.
Reply With Quote
  #4  
Old 2/16/08, 8:22 PM
Bob Elliott's Avatar
Bob Elliott Bob Elliott is offline
InterNACHI Member
 
Join Date: Aug 2006
Location: Chicago
Posts: 21,916
Default Re: Low service over a roof

Speedy who ran the drop from the pole to that mast location.
Is it not the utiity companies responsibility?
Reply With Quote
  #5  
Old 2/16/08, 8:22 PM
Speedy Petey Speedy Petey is offline
Unmoderated Guest
 
Join Date: Jul 2006
Posts: 1,297
Please Note: Speedy Petey is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

Also, from a code standpoint in this instance:
- If the roof is less than a 4/12 pitch there must be 8' of clearance.
- For roofs of 4/12 or more, and where the voltage between conductors does not exceed 300V, the clearance can be reduced to 3'.
Reply With Quote
  #6  
Old 2/16/08, 8:24 PM
Speedy Petey Speedy Petey is offline
Unmoderated Guest
 
Join Date: Jul 2006
Posts: 1,297
Please Note: Speedy Petey is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

Quote:
Originally Posted by relliott
Speedy who ran the drop from the pole to that mast location.
Is it not the utiity companies responsibility?
Yes they did. But it is NOT their responsibility to maintain clearances. Such as roof or window clearances.
They did not put the mast there. The installer did.

IMO that should have never even been hooked up.
Reply With Quote
  #7  
Old 2/16/08, 8:28 PM
Bob Elliott's Avatar
Bob Elliott Bob Elliott is offline
InterNACHI Member
 
Join Date: Aug 2006
Location: Chicago
Posts: 21,916
Default Re: Low service over a roof

Here is why I think it is up to the service provider.
http://www.nachi.org/forum/f19/service-drop-question-24382/
Also they never should have ran the drop conductors from the pole to the mast then correct? But they did .
Or are you saying a sparky moved the conductors on his own.
Just want this straight.
Reply With Quote
  #8  
Old 2/16/08, 8:34 PM
rbrady's Avatar
rbrady rbrady is offline
Active Poster
 
Join Date: Feb 2007
Location: Eureka, CA
Posts: 619
Please Note: rbrady is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

The mast wasn't replaced, but the cable from the pole and the connectors looked new. The roof also had new shingles near the peak where the cable passed. I suspect the previous cable was damaged by the roof, and damaged some shingles.

Those service wires were only about 2 feet over the roof at the highest point.

It is hard to believe the utility company would do that.

Thanks for the replies.
Reply With Quote
  #9  
Old 2/16/08, 8:37 PM
Speedy Petey Speedy Petey is offline
Unmoderated Guest
 
Join Date: Jul 2006
Posts: 1,297
Please Note: Speedy Petey is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

Robert, no, I am not saying the installer moved the drop, and I do agree that it should have never been installed in the first place, but these things do happen even though they shouldn't.

I'm not sure what that other thread proves, and to be honest it does not apply here.
Without getting all codey, a drop that crosses a roof for the distance shown in this thread falls under MUCH stricter rules than one in your thread.
I can post the code sections if you like. It may clarify things.
Reply With Quote
  #10  
Old 2/16/08, 8:37 PM
Bob Elliott's Avatar
Bob Elliott Bob Elliott is offline
InterNACHI Member
 
Join Date: Aug 2006
Location: Chicago
Posts: 21,916
Default Re: Low service over a roof

Hope you checked the link out where I had a simular question.
Reply With Quote
  #11  
Old 2/16/08, 8:40 PM
Bob Elliott's Avatar
Bob Elliott Bob Elliott is offline
InterNACHI Member
 
Join Date: Aug 2006
Location: Chicago
Posts: 21,916
Default Re: Low service over a roof

Ok Speedy but I was using that to reference where everyone seemed to agree the utility company should move it.
That is the advise I give since and had another situation recently.
Let me go dig up the pic.Ono momento.
Reply With Quote
  #12  
Old 2/16/08, 8:44 PM
Speedy Petey Speedy Petey is offline
Unmoderated Guest
 
Join Date: Jul 2006
Posts: 1,297
Please Note: Speedy Petey is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

In the mean time. Just for reference. The situation in this thread Exc. #2 applies. In your thread Exc. #3 applies.

225.19 Clearances from Buildings for Conductors of Not Over 600 Volts, Nominal

(A) Above Roofs
Overhead spans of open conductors and open multiconductor cables shall have a vertical clearance of not less than 2.5 m (8 ft) above the roof surface. 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.

Exception No. 1: The area above a roof surface subject to pedestrian or vehicular traffic shall have a vertical clearance from the roof surface in accordance with the clearance requirements of 225.18.

Exception No. 2: Where the voltage between conductors does not exceed 300, and the roof has a slope of 100 mm in 300 mm (4 in. in 12 in.) or greater, a reduction in clearance to 900 mm (3 ft) shall be permitted.

Exception No. 3: Where the voltage between conductors does not exceed 300, a reduction in clearance above only the overhanging portion of the roof to not less than 450 mm (18 in.) shall be permitted if (1) not more than 1.8 m (6 ft) of the conductors, 1.2 m (4 ft) horizontally, pass above the roof overhang and (2) they are terminated at a through-the-roof raceway or approved support.

Exception No. 4: The requirement for maintaining the vertical clearance 900 mm (3 ft) from the edge of the roof shall not apply to the final conductor span where the conductors are attached to the side of a building.
Reply With Quote
  #13  
Old 2/16/08, 8:46 PM
Bob Elliott's Avatar
Bob Elliott Bob Elliott is offline
InterNACHI Member
 
Join Date: Aug 2006
Location: Chicago
Posts: 21,916
Default Re: Low service over a roof

low-service-over-roof-dscn4402-small-.jpg.JPG
Views:	51
Size:	26.4 KB
ID:	18696
Sorry for the poor quality as it was a drive by.
The mast was in the picture then moved to the other side where the conductors were actually touching the chimney.
I told him to call the power company.
This could be corrected with a mid-span aerial drop, as it is still straight from the pole.
Technically I believe they are not allowed to cross property lines any more.
Reply With Quote
  #14  
Old 2/16/08, 8:52 PM
rbrady's Avatar
rbrady rbrady is offline
Active Poster
 
Join Date: Feb 2007
Location: Eureka, CA
Posts: 619
Please Note: rbrady is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

Quote:
Originally Posted by Speedy Petey
...The situation in this thread Exc. #2 applies.
...Exception No. 2: Where the voltage between conductors does not exceed 300, and the roof has a slope of 100 mm in 300 mm (4 in. in 12 in.) or greater, a reduction in clearance to 900 mm (3 ft) shall be permitted.
Actually, I think that due to the relatively low roof pitch, this exception doesn't apply.
Reply With Quote
  #15  
Old 2/16/08, 8:54 PM
Speedy Petey Speedy Petey is offline
Unmoderated Guest
 
Join Date: Jul 2006
Posts: 1,297
Please Note: Speedy Petey is a non-member guest and is in no way affiliated with InterNACHI or its members.
Default Re: Low service over a roof

Really, that looks like at least 4/12 to me. No?
3/12 is pretty flat.
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Building Science- research from respected sources Brian A. MacNeish Ancillary Inspection Services & Additional Topics 17 7/12/11 6:31 AM
Chimney flashing photo's needed: brick and stone done correctly kshepard Exterior Inspections 6 10/13/07 8:10 AM
Roof Repair? Maybe NO jhagarty Exterior Inspections 9 2/15/07 1:19 AM
Service Drop Clearance Over Roof mlong Electrical Inspections 6 12/19/06 7:39 AM


All times are GMT -4. The time now is 8:23 AM.


Popular Sections

:

All Sections

Inspection News

InterNACHI Membership

Inspection Standards

Inspection Education

InterNACHI Inspectors

Inspection Links

 

 

 

NACHI.ORG Statistics

 

 

no new posts