electrical
I was looking at some Corrugated Conduit Black 20mm X 10m and I was wondering what fixings would be suitable for terminating inside a wall connecting to the backbox (the gland). I can find glands for normal round conduit but I'm having trouble getting the ones suitable for this stuff.
I'm from Ireland so it's the same as the UK regs.
Also what clips would you advise for inside the chased masonry wall which will be plastered over? And I suppose some SS masonry nails would do the job?
You piqued my interest and I have a screwdriver.
Here's how a professional electrician in the UK made joins in wiring in my office building constructed 2001 (so as per regulations at that date).
Not all junctions contain joins. Some do.
So yes, use terminal strips (blocks) like these - all DIY stores have them, some ironmongers and larger supermarkets too. Make sure they are rated for the current they'll carry.
As you know, Part P of current UK building regulations apply to DIY work on wiring connected to mains supply.
If you have evidence of rodent damage to other wires in that location then maybe it's worth doing something more. But otherwise if using conduit is the more difficult method, I don't think I'd bother. If your garage is open framing and you can run from point A to point B in an approved NM fashion, that's the way to go. Nail a plastic 2 gang box to a 2 by and run the #6-3 NM. BTW I think #8-3 NM would've been OK for that circuit.
Best Answer
The 2017 NEC article 362.10.1.B allows flexible non metallic conduit (smurf tube) concealed in walls floors and ceilings. 362.30.A securely fastened every 3 feet. Zip tie anchors are even allowed code added a statement that the zip tie had to be listed for securing and supporting (my state deletes this because this is what a zip tie is for). I usually purchase a bag of plastic clamps that are held in with a nail or screws if 1 hole at the start and end of a run I will use 2 one on each side so when fishing the wire through it it won’t pull lose from the clamps and on the inside radius of any unsupported turn when the wires pull tight if the clamp is on the outside it can pull out on occasion if the wall is closed you may not even notice it.