Running Conduit On A Flat Roof

Although looking at it now the 2008 uses shaded sections for new or modified wording so the thin line might just be for new.

Running conduit on a flat roof.

I cannot run it on the side of a parapet. At the moment the gutter drain pipe from the roof of the main property is running above the flat roof then is diverted along a drain pipe diagonally along the back external wall of the prerogative to a drain halfway along the property very ugly. In the past i ve put down 1 foot long pieces of treated 2x4 every 5 feet and ran pvc conduit. August 02 2011 09 56 26 am author.

By way of comparison the wall thick ness of 1 2 inch thick metallic conduit is comparable to the metal thickness of a 20 gauge steel roof deck. Lic conduit embedded within or directly underneath roof assemblies. Mounting conduit on existing flat roof any time you see a thin black line to the left of a paragraph in the nec it means that it s new or the wording has changed. I m in florida and i have installed thousands of feet of pvc on roof tops.

I can tell you real quick like it gets brittle after around 5 years. Exterior grade ethernet cables are waterproof and can be buried in the ground without a conduit. This is important when running the cable up the side of a house or across a roof. Does the nec specify a clearance between the bottom of roof decking and electrical conduit.

Also cutting and roof system removal. The system will use cat 6 to each camera and running these wires indoors is impractical in most of the building. Running conduit through roof reply 5 on. We are replacing part of the plant roof and some of the 277 lighting conduit runs along the bottom of the roof decking.

I have to run a circuit to supply power to a sign across about 50 feet of flat roof. So i m planning on running all camera wires in pvc schedule 40 either. Seanb 1 don t forget the coil of cable and add a few ferrite toroids over the cable as well. I m a lv contractor and will be installing a cctv system on a building with a flat roof with a parapet.

All will help attenuate the let through energy. But this time i would like to do a neater job. If your lucky you will get 10 years service out of roof mounted pvc conduit in florida. I am worried about a roofer running a screw into the conduit as they secure the insulation.

If you aren t burying the cable choose a waterproof cat 6 cable that has a uv protective jacket to prevent damage from sunlight exposure. Hi currently at the side of our house there is a large utility extension from the garage extending 2 3m into the garden.