I m in florida and i have installed thousands of feet of pvc on roof tops.
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.
I can tell you real quick like it gets brittle after around 5 years.
All will help attenuate the let through energy.
So i m planning on running all camera wires in pvc schedule 40 either.
Does the nec specify a clearance between the bottom of roof decking and electrical conduit.
Lic conduit embedded within or directly underneath roof assemblies.
We are replacing part of the plant roof and some of the 277 lighting conduit runs along the bottom of the roof decking.
Exterior grade ethernet cables are waterproof and can be buried in the ground without a conduit.
Hi currently at the side of our house there is a large utility extension from the garage extending 2 3m into the garden.
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.
I cannot run it on the side of a parapet.
The system will use cat 6 to each camera and running these wires indoors is impractical in most of the building.
Although looking at it now the 2008 uses shaded sections for new or modified wording so the thin line might just be for new.
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.
August 02 2011 09 56 26 am author.
Seanb 1 don t forget the coil of cable and add a few ferrite toroids over the cable as well.
The only reason we haven t install emt was because of the salt air.
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.
This is important when running the cable up the side of a house or across a roof.
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.
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.
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.
