lightning protection down conductor

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Rob11

New member
Location
United States
Can a bare copper lightning protection conductor be routed exposed in a return air plenum between the roof penetration and a PVC conduit routed from the ceiling to the grounding electrode below ground? Does this violate NEC 300.22C?
 

dicklaxt

Senior Member
Lightning protection conductors have a special cable construction................if you are under any jurisdiction you would have to use it.me thinks.

dick
 

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
I don't really like lightning protection conductors inside the building, but NFPA does permit them to be inside the building. There are rules that require any metal object within 6' to be bonded to the lightning protection conductor.

The lightning protection conductors are normally bare and if that is the case I see no reason why they can't be installed in a 300.22(C) space.
 

north star

Senior Member
Location
inside Area 51
* * * *

Rob11,

Is the bare copper conductor and the pvc piping rated AND labeled for
this installation [ RE: Section 602.2.1.1 in the `06 IMC ] ?.....If not,
then "no install" in the plenum.


+ + + +
 

Gregg Harris

Senior Member
Location
Virginia
Occupation
Electrical,HVAC, Technical Trainer
* * * *

Rob11,

Is the bare copper conductor and the pvc piping rated AND labeled for
this installation [ RE: Section 602.2.1.1 in the `06 IMC ] ?.....If not,
then "no install" in the plenum.


+ + + +

The bare copper is inside the duct and the PVC is the raceway external to the duct, 602.2.1.1 does not apply.
 

north star

Senior Member
Location
inside Area 51
+ + + +

"Can a bare copper lightning protection conductor be routed exposed in a return air plenum... "
My bad!....Section 602.2.1.1 applies only to "combustible" electrical
methods and materials........Gregg Harris is correct!
:eek:hmy:

+ + + +
 
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