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1

Any plastic type back boxes should be lined on the external side with fire resisting material. A fire resisting putty is available for metal back boxes you should not use open back boxes in fire walls. seal the open end of conduits with FR putty


3

NEC Article 362 I've copied the NEC portions that cover corrugated HDPE (High Density Polyethylene) conduit for your reading pleasure. The NEC differentiates between corrugated and non corrugated HDPE conduits by referring to corrugated HDPE as ENT and non corrugated as just HDPE. Non corrugated HDPE is not allowed at all in any buildings, whereas ...


2

It is okay to drill from below as long as you know, for a fact that you are not going to hit ANYTHING, otherwise go into the attic. The conduit can run on the floor of the attic but I would use a two hole strap and get it above the insulation . I would use a plastic pull box with a plastic cover, the backless may not give you the support that you need when ...


2

I'm not a fire expert, but I doubt fire will actually spread through the conduit. Toxic fumes, sure, but not fire (unless the conduit is really short). Flames will, however, quickly jump through a hole in a 1 1/2" - 3" thick barrier. If you really want to take fireblocking to the extreme, you could seal the ends of the conduit around the cables with ...


2

This is why every livable room is required to have at least two ways to exit room. If all paths are blocked, you then have to wait for the fire department to come with the ladder truck. Any other means will put you in greater dander. Also it is not the ladder catching on fire that is the concern, but climbing through heat/fire/smoke that will make it ...



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