ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#198336 - 01/18/11 07:41 PM lightning protection conductor
triple Offline
Member
Registered: 04/01/02
Posts: 184
Loc: Wisconsin
The lightning protection wire is run inside pvc through the building I am working on. However, a 50' stretch is run outside the pvc and simply strapped-up to the steel decking through the ceiling of one room. Surely this cannot be allowed? In the event of a lightning strike, couldn't the arcing and sparking created between the wire and the deck result in a fire?
Top
2017 / 2014 NEC & Related Books and Study Guides
#198340 - 01/18/11 09:41 PM Re: lightning protection conductor [Re: triple]
georgestolz Offline
Member
Registered: 06/26/05
Posts: 91
Loc: Fort Collins, CO, US
I can't think of an NEC violation, but it might run against the... NFPA 780? Whatever the lightning one is.
_________________________
-George
Top
#198347 - 01/19/11 06:40 AM Re: lightning protection conductor [Re: georgestolz]
HotLine1 Offline


Member
Registered: 04/03/02
Posts: 6776
Loc: Brick, NJ USA
Lightning protection here (NJ) are installed by "Certified Installers" to the best of my knowledge. As an EC, the sites that I worked on (Country Clubs) had a lightning contractor.

What you described does not sound 'right', but that's just a off the cuff comment. All the conductors that I have noticed were routed on the exteriors of the structures.

_________________________
John
Top
#198505 - 01/24/11 10:27 AM Re: lightning protection conductor [Re: HotLine1]
sabrown Offline
Member
Registered: 12/12/02
Posts: 302
Loc: Ogden, Utah, USA
Just some items to be aware of besides the certified installer.

There is no typical requirement stating that the "down conductors" not allowed being run through the interior of a building. That being said, it does create alot more bonding issues that must be taken care of (flashovers).

There is no normal installation "shall" requirement that the conductors be in conduit.

But simply strapping a down conductor to steel decking does not meet bonding requirements assuming strapping means something to just hold the condutors in place (every 36" maximum). These are typically bonded via bonding plates or cadwelded. Whatever is used it is listed for lightning protection and has very specific requirements.

There are however requirements for regular yearly inspection of the system.

I am sorry that I can't put more information into this reply, but that would involve teaching a course on lightning protection.
Top

Member Spotlight
Member Since: 02/23/13
Posts: 204
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 59 Guests and 9 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 51
HotLine1 43
gfretwell 17
Trumpy 16
Ruben Rocha 13
 
Newest Members
clee512, Jdscott2005, FAIZAN, Regitest2, sureshazhagai

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals