Fitting conduit in EPS

[BotusBuild]

Several months ago on a thread I can no longer locate, I committed to donating the location to create a short video of installing conduit for running electric cable to sockets in EPS insulation, specifically in this case Nudura.

Well, finally, I bought a roundtuit, and we have results.

For those who don't know, if you are not using the low smoke insulated cable (at 20-30% more cost), then using conduit is the way to go. Why? If the cable heats up, it can melt the EPS which turns into a glass like substance. This in turn can then cut the insulation on the outside of the cable with potentially devastating consequences.

 

First the video (sorry, can't seem to resize this):

 

Link for the hot knife - https://www.amazon.co.uk/gp/product/B07F8LFRCF/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

 

No extra videos, just a few follow on picture of the conduit in place

 

The sockets have since been cut further back into the EPS so the conduit sits flat

[Dreadnaught]

I wonder, are there prescribed widths or depths for a channel so as not to need to de-rate an electrical cable for being inside insulation?

 

Nice video. 

[BotusBuild]

I am told that standard electric cable cannot be in contact with EPS. Fullstop. The only way to guarantee that is to run it through conduit. What is not obvious from the photos is that the final conduit runs the full length  (and more) of that cut channel. Hope that helps

[BotusBuild]

Not the best picture, but this is what it looks like once the box is properly set in the wall