Running Conduit On A Flat Roof

The only reason we haven t install emt was because of the salt air.

Running conduit on a flat roof.

I cannot run it on the side of a parapet. This is important when running the cable up the side of a house or across a roof. We are replacing part of the plant roof and some of the 277 lighting conduit runs along the bottom of the roof decking. 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.

Self cutting or self drilling roof fasten ers can readily penetrate metals of these thicknesses. 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. Also cutting and roof system removal. Although looking at it now the 2008 uses shaded sections for new or modified wording so the thin line might just be for new.

Lic conduit embedded within or directly underneath roof assemblies. But this time i would like to do a neater job. I m in florida and i have installed thousands of feet of pvc on roof tops. August 02 2011 09 56 26 am author.

In the past i ve put down 1 foot long pieces of treated 2x4 every 5 feet and ran pvc conduit. 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. I am worried about a roofer running a screw into the conduit as they secure the insulation. 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. So i m planning on running all camera wires in pvc schedule 40 either. Exterior grade ethernet cables are waterproof and can be buried in the ground without a conduit. The system will use cat 6 to each camera and running these wires indoors is impractical in most of the building.

Seanb 1 don t forget the coil of cable and add a few ferrite toroids over the cable as well. Does the nec specify a clearance between the bottom of roof decking and electrical conduit. I can tell you real quick like it gets brittle after around 5 years. Hi currently at the side of our house there is a large utility extension from the garage extending 2 3m into the garden.

I have to run a circuit to supply power to a sign across about 50 feet of flat roof. Running conduit through roof reply 5 on.