Supersteele21
Member
- Location
- Winston-Salem, NC
I'm having a little trouble with an engineer (at least I hope so) on a lightning protection installed on a hospital building I am finishing up.
We installed PVC from the ground level up to just below the roof (inside the columns). From there, we used RMC nipples (approximately 3-4' in length) to penetrate through the roof. The lightning protection system is bonded at every nipple through the roof, and bonded again to the ground loop at ground level. I am catching some flack from the engineer who says that "NFPA 780 and probably UL require that conduit be bonded at both ends of the system".
I think that the RMC being bonded to the lightning protection system as well as the ground loop on the Earth side is sufficient. What he wants us to do is take out all the RMC and install PVC nipples- which will be a tremendous headache for all involved: new cad welds, roof patching, etc. Especially with the state health inspection scheduled for September 13th!
I am a new member here, but I have often used the forum as a research tool and certainly appreciate anyone's help/advice.
Thanks!
We installed PVC from the ground level up to just below the roof (inside the columns). From there, we used RMC nipples (approximately 3-4' in length) to penetrate through the roof. The lightning protection system is bonded at every nipple through the roof, and bonded again to the ground loop at ground level. I am catching some flack from the engineer who says that "NFPA 780 and probably UL require that conduit be bonded at both ends of the system".
I think that the RMC being bonded to the lightning protection system as well as the ground loop on the Earth side is sufficient. What he wants us to do is take out all the RMC and install PVC nipples- which will be a tremendous headache for all involved: new cad welds, roof patching, etc. Especially with the state health inspection scheduled for September 13th!
I am a new member here, but I have often used the forum as a research tool and certainly appreciate anyone's help/advice.
Thanks!