Running cable beneath sub floor?

[A032701]

A customer has asked for a complete rewire for their house that they are doing work on. he has had to put in a new floor everywhere downstairs as it was wooden joists and he wants it solid. He is building it up with hardcore then a concrete subfloor on top of that (about 4 inches). on top of that there is dpm then celotex, he is having UFH so that will go on top of the celotex followed by screed.
what would be the easiest way to run the ring for the sockets. i want to try and avoid running it in the ceiling void and dropping down to the sockets as it will mean taking up a lot of floorboards.
thanks

 

[Andy78]

You're left with wiring zones in the walls then if floor and ceiling are out of consideration.
I think running above and dropping down would be the easiest personally.

 

[Michael Sands]

Probably only other option is to run conduit before floor is laid but I would just lift floorboards upstairs once you get some up you should find a good route for cables without lifting too many

 

[A032701]

Since concrete is classed a mechanical protector, i assume i can run it in conduit on top of the hardcore and lay the concrete sub floor on top?

 

[buzzlightyear]

he wants it solid. He is building it up with hardcore then a concrete subfloor on top of that (about 4 inches). on top of that there is dpm then celotex, he is having UFH so that will go on top of the celotex followed by screed.

it would be better for the cables to come down from the first flooring has andy says, considering the cables might get damaged are you going to go back to start jack hammering the floor up ,me thinks knot .

 

[Dustydazzler]

Galv conduit ?

 

[SJD]

If this is "complete rewire" then you are going to need upstairs floorboards up for the lighting, also the upstairs sockets.

So the only advantage in putting the downstairs sockets under the floor is a bit less chasing of cables into the walls?

 

[buzzlightyear]

Galv conduit ?

skirting boards !

 

[Pete999]

skirting boards !

That's a no no, aint it Buzz

 

[buzzlightyear]

That's a no no, aint it Buzz

just making a point Pete .

 

[Pete999]

just making a point Pete .

Right, OKyyyyyyyyyyy

 

[davesparks]

Since concrete is classed a mechanical protector, i assume i can run it in conduit on top of the hardcore and lay the concrete sub floor on top?

You should keep cables above the DPM, on top of the concrete is best.

 

[A032701]

ok thanks everyone. out with the floorboards then

 

[buzzlightyear]

ok thanks everyone. out with the floorboards then

get some one to hit you with one .

 

[Charlie_]

Recently completed a job which was a large vaulted oak beam building..
I got the main contractor to leave an open channel around the perimeter..
Cables were routed through and then boarded over afterwards

 

[telectrix]

just wondering why customer wants to get rid of a perfectly sound wood floor and replace with bloody concrete. it's not the third reich any more ( unless it's got dry rot, then new timber, seasoned over years and logged by the following, why?)