Installing shower 3-core Cable 10mm2- under the Wall

Rock_007

hi,


I am laying the 10mm 3-core cable into the wall, i was struggling before but later found the route to the artic the only problem i am facing now to dig the right amount ( i believe that i won't be able to do much deeper ) as yet i hardly able to do 2cm deep and i can see some stone at the back(photo) so i might need some conduit or something similar . is some one can please advise me about the right conduit to buy as i am not sure for the size and where to get it from and the minimum depth that i needs to go ignorer to lay the cable.

Pics in below post.

Rock_007

Cable pic and wall pics






wall plaster pic and cable picture


i really appreciate any comments or advise

tacpot12

I'd cut a shallow channel into the brick using angle grinder to get the cable deep enough. Just be prepared for a lot of dust.

Rock_007

thank for the reply, i am a bit worried about the stone behind the plaster as it doesn't look like a normal brick and when i drill into the wall black dust comes out, any idea what it could be.

Owain_Moneysaver

I don't know why you're using that sort of cable (I can guess at one reason - RCd and permitted zones) but 10mm flat Twin and Earth would be a lot easier to bury.

You're going to have to chase a slot into the brick/stone underneath to bury it sufficiently thick.

molerat

Rock_007 wrote: »

thank for the reply, i am a bit worried about the stone behind the plaster as it doesn't look like a normal brick and when i drill into the wall black dust comes out, any idea what it could be.

Is it quite soft, looks like cinder block to me.

FreeBear

tacpot12 wrote: »

I'd cut a shallow channel into the brick using angle grinder to get the cable deep enough. Just be prepared for a lot of dust.

A wall chaser attached to a suitable vacuum cleaner would be preferable. Still dusty work, and the OP should use a good quality dust mask & goggles. It would be a good idea to seal the doorway and open any windows, but dust will still go everywhere in the house. Tip - A squirty bottle to spray water around in the room after any cutting will help to reduce the dust cloud.

The real messy option is an angle grinder with a diamond disk...

A 25mm deep channel will be ample for the cable - Just make sure any vertical chases are no more than 30mm deep (assuming standard size brick cavity wall). The routing of the cable also needs to be in a recognised "safe zone", usually within 150mm of a corner or directly in line with a switch.

As this is in a wet area, the work becomes notifiable to building control and needs to be signed off when completed.

Rock_007

Owain_Moneysaver wrote: »

I don't know why you're using that sort of cable (I can guess at one reason - RCd and permitted zones) but 10mm flat Twin and Earth would be a lot easier to bury.

You're going to have to chase a slot into the brick/stone underneath to bury it sufficiently thick.

to be honest i am not much an electric guy, i just looked around and bought it through eBay, i wouldnt have if i knew that.

Rock_007

Owain_Moneysaver wrote: »

I don't know why you're using that sort of cable (I can guess at one reason - RCd and permitted zones) but 10mm flat Twin and Earth would be a lot easier to bury.

You're going to have to chase a slot into the brick/stone underneath to bury it sufficiently thick.

molerat wrote: »

Is it quite soft, looks like cinder block to me.

FreeBear wrote: »

A wall chaser attached to a suitable vacuum cleaner would be preferable. Still dusty work, and the OP should use a good quality dust mask & goggles. It would be a good idea to seal the doorway and open any windows, but dust will still go everywhere in the house. Tip - A squirty bottle to spray water around in the room after any cutting will help to reduce the dust cloud.

The real messy option is an angle grinder with a diamond disk...

A 25mm deep channel will be ample for the cable - Just make sure any vertical chases are no more than 30mm deep (assuming standard size brick cavity wall). The routing of the cable also needs to be in a recognised "safe zone", usually within 150mm of a corner or directly in line with a switch.

As this is in a wet area, the work becomes notifiable to building control and needs to be signed off when completed.

thanks for your advise above, also isn't it that its legal requirement to go 50mm deep at-least?

Rock_007

molerat wrote: »

Is it quite soft, looks like cinder block to me.

it doesn't look very soft although when i try to drill it goes quite easily for few millimetres.

Warwick_Hunt

Rock_007 wrote: »

to be honest i am not much an electric guy, i just looked around and bought it through eBay, i wouldnt have if i knew that.

And your electrician is ok with you buying the gear and running your own cables?