I'm looking to quote a job for a CCTV system that utilizes a composite video cable w/ 110V feed to the cameras. I would like to know whether I need to install the cable in conduit on the roof top or can I run it exposed. The cable is outdoor and sun light resistant rated. One roof is an accessible flat and the other is pitched. (probably get run on the exterior of the building.) I have looked through the NEC code and can not find something that addresses this directly. Maybe I missed it...Any help out there?
Exposed Wiring on Accessible Roof
- Thread starter driley32
- Start date
- Status
driley32 said:
IMO if your not using it as it's listing (underground),then your using it as nonmetallic sheath cable (334.10), and is subject to the requirements of article 334. Article 334.30 requires supports every 4-1/2' and if subject to physical damage (334.15(B), it needs to be protected by a raceway. Being on a flat roof, i would think that would be subject to physical damage.
Rick
edit for spelling
Last edited:
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Rick must have better eyes than me - what type of cable is it? 
Sounds like it's perfectly fine exposed, but I would probably install it in conduit for protection.
Sounds like it's perfectly fine exposed, but I would probably install it in conduit for protection.
- Status