Running Conduit On A Flat Roof

I have to run a circuit to supply power to a sign across about 50 feet of flat roof.

Running conduit on a flat roof.

The only reason we haven t install emt was because of the salt air. Exterior grade ethernet cables are waterproof and can be buried in the ground without a conduit. August 02 2011 09 56 26 am author. So i m planning on running all camera wires in pvc schedule 40 either.

I m in florida and i have installed thousands of feet of pvc on roof tops. Hi currently at the side of our house there is a large utility extension from the garage extending 2 3m into the garden. I can tell you real quick like it gets brittle after around 5 years. The system will use cat 6 to each camera and running these wires indoors is impractical in most of the building.

Also cutting and roof system removal. This is important when running the cable up the side of a house or across a roof. Lic conduit embedded within or directly underneath roof assemblies. I cannot run it on the side of a parapet.

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. If your lucky you will get 10 years service out of roof mounted pvc conduit in florida. Although looking at it now the 2008 uses shaded sections for new or modified wording so the thin line might just be for new. All will help attenuate the let through energy.

Self cutting or self drilling roof fasten ers can readily penetrate metals of these thicknesses. But this time i would like to do a neater job. 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. I m a lv contractor and will be installing a cctv system on a building with a flat roof with a parapet.

Seanb 1 don t forget the coil of cable and add a few ferrite toroids over the cable as well. In the past i ve put down 1 foot long pieces of treated 2x4 every 5 feet and ran pvc conduit. Running conduit through roof reply 5 on. Does the nec specify a clearance between the bottom of roof decking and electrical conduit.

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. We are replacing part of the plant roof and some of the 277 lighting conduit runs along the bottom of the roof decking.