MegaSack DRAW - This year's winner is user - rgwb
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trying to work out how to rewire a small hall, it has doors on three sides and a solid concrete floor and unless I rip a bathroom floor up no access above. I want a set of sockets on 2 opposite walls. what are the regs on putting a chase in the floor? it will either have a vinyl or laminate floor eventually.
or is there another better approach?
I can't think of any major differences to it being under a wooden floor, but check the latest regs because I'm at least one amendment out of date
I would put a pvc conduit into the chase to make future additions simpler, ideally put the cable 50mm below the surface or you'll need steel conduit, which must be earthed
Line the ends of the conduit up to get a vertical run up to the sockets to fulfill the safe zone, and ideally continue the conduit to the socket pattresses
Ideally no inaccessible joints should be made in the cable (certain very specific joint types are allowed), so plan terminations to happen inside the pattresses. Don't run other cables, e.g. TV, network, etc in the same conduit unless it's properly separated
Backfill the chase and I would paint the surface for future reference
Thanks timba, 50m depth should be fine and was planning on using plastic oval conduit. good tips about making sure it lines up with the sockets and painting it. I'll prob use a sharpish to write on the chase before we lay the floor.
No way of bringing the wires from the far sides of the wall?
under the floor in a conduit not an issue at all. if you can buy a spring or pre made 90 degree bends to keep the conduit continuous up into your socket. are you starting the first one back to back with an existing socket?
Yes one side will be coming in via a socket on the other side of the wall, then plan to drop down and chase across the floor, then back up to the other socket The far wall backs on to the garage, so can't come in from that direction, unless I want a socket on the garage circuit inside the house.
For one socket ,I’d go from the garage ring. Make a note of it in the distribution board .
Chasing a channel in a concrete floor is horrible & in your case unnecessary.
But I’m lazy and hate dust.
I agree with senior j. Or go through the ceiling.if you take it from the garage, id put something in the box to warn future electricians. Eg, just write it on with a permanent marker. Or a plastic label of some kind
Also are your sockets on a ring or radial? Ring is usual for the UK and in that case you can't spur two sockets from another one.
I'd go with one from the garage. Much easier and not that big a deal. Just label it.
plan was to extend the rings rather than spur. maybe I will go from the garage. I've been undoing loads of random shit and wanted it all to be as logical and neat an install as I could make it.
save yourself a lot of grief and come out of the nearest socket on the garage wall and the other on the socket inside wall. most efficient way.