I am rewiring a front room/kitchen will be LABC approved. I have five circuits that run from a CU in hallway cupboard - these have to run in screed for about 1.5 m (two door widths) L shape due use of full height doors, concrete ceiling etc. Circuits then run up 2.4m of stud wall, along 4m, around a corner, across 2m, then 3 kitchen circuits run down and stop at DP isolation switches -- all still in stud wall. The 2 living room circuits don't run down but continue across and around to service lights + power in the room (the rest of the room being breeze block). Kitchen circuits are 2x 10mm radials (hob + dual ovens), 1 x 4mm radial (kitchen appliances / sockets), living room circuits are 1x 1.5mm (lights) + 1x 4mm radial (sockets).
Question 1:
- I don't want to use steel conduit in screed (too hard to bend), but looking at galvanised flexible conduit with PVC coating, appears to have same mechanical protection, plus will be in concrete. It's a bit more costly, but short distance and easier for me to work. Alternatively, I could get some flush screed channel, but this is a bit specialised and might be hard to work. 5 flexible conduits seem easiest. Does that sound sensible? The routing around the hallway cupboard is complicated due to multiple water pipes, UFH pipes, etc
.
Queston 2:
- For the cables - what's the best way to do this: singles between the CU through the conduit and then junction them to T+E in the stud wall so they go T+E onwards, or due to kitchen circuit length to DP switches being short, just run singles all the way there in oval? I can't run singles all the way for the 2 room circuits, so either do actually need to junction them to T+E, or if I'm using 20mm conduit, plus they are radials, it is okay to put T+E through the conduit? Since the conduit run is pretty small, and each circuit has its own conduit, derating should be minimal.
Thanks for reading!
Question 1:
- I don't want to use steel conduit in screed (too hard to bend), but looking at galvanised flexible conduit with PVC coating, appears to have same mechanical protection, plus will be in concrete. It's a bit more costly, but short distance and easier for me to work. Alternatively, I could get some flush screed channel, but this is a bit specialised and might be hard to work. 5 flexible conduits seem easiest. Does that sound sensible? The routing around the hallway cupboard is complicated due to multiple water pipes, UFH pipes, etc
.Queston 2:
- For the cables - what's the best way to do this: singles between the CU through the conduit and then junction them to T+E in the stud wall so they go T+E onwards, or due to kitchen circuit length to DP switches being short, just run singles all the way there in oval? I can't run singles all the way for the 2 room circuits, so either do actually need to junction them to T+E, or if I'm using 20mm conduit, plus they are radials, it is okay to put T+E through the conduit? Since the conduit run is pretty small, and each circuit has its own conduit, derating should be minimal.
Thanks for reading!
