Not quite sure of this one... Conduit installed, but can singles go through masonry

[Mr.Si]

Hi all,

I'm not sure about this, but there is PVC conduit installed one side of a masonry wall and the KO boxes are on the other side of this wall, with the aim of the cables entering into these KO boxes from the back.

Now in my mind, conduit has singles in, not Twin + CPC, but I'm concerned about there being a bunch of singles going through the wall to the other side and there not being a sheathing to protect the individual cores.

Please could someone point me toward either the correct regulation or put it in simple terms what I can and cannot do.

This is not a question about safe zones (before anyone mentions them).

Thanks all,

Si

 

[oxocube]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

The conduit must be continuous, so fit a piece of conduit through the wall linking 2 back to back boxes.

Or you could do a loop in system into loop in boxes.

 

[Deleted member 26818]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Nothing stopping you from passing singles through a wall, as the wall will provide mechanical protection.

 

[Mr.Si]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Nothing stopping you from passing singles through a wall, as the wall will provide mechanical protection.

Even if the masonry could hurt the singles when passing through? I suppose it just needs a bit of care and then the cables will forevermore be static.

 

[malcolmsanford]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

If you look at regulations 521 then you will see that they refer you to appendix 4 and table 4A1. Where non sheathed cables can only be installed within a containment system or onto insulators, so though it does not mention through walls directly I would interpret that you can not install singles cables unless they are enclosed in conduit, trunking or ducting.

Of course Bonding and main earth conductors can be.

 

[oxocube]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Nothing stopping you from passing singles through a wall, as the wall will provide mechanical protection.

Try getting the cable manufacturer to agree to and guarantee that installation method.

 

[Mr.Si]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Thanks gents.

I will have to work out how to get a bigger hole through the wall with the drill bits I have and send a bit of conduit through.

 

[malcolmsanford]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

If the conduit is 20mm then a normal 20mm hole will do nicely, unfortunately 25mm conduit requires about a 26mm hole as it is a bit snug.

 

[telectrix]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

or a hammer

 

[topquark]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Maybe a bit of flexible conduit from the back of the through box to the knockout box would be a little easier.

 

[Mr.Si]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Now there's a plan!

However, I was just thinking of running Twin & CPC through the conduit (there's only one length, as it's just 2 single gang sockets on a radial) and then put the inspection box over the hole and pass the twin&cpc through, which will be fine.

Many options!

 

[telectrix]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

i'd stiil shove a bit of tube through the wall. what if the brickworms start eating the cable ( if you take this seriously, you should be on the screwfux forum.LOL.)

 

[Engineer54]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

I would always insist that any cable system passing through any type of wall or structure, should be done so by means of propriety electrical enclosure system such as conduit etc, or in the case of multi cored cables etc, by means of a sleeve... In the case of fire walls and slabs in commercial/industrial installations, any form of electrical wiring containment or cable sleeves, will need fire rated sealing/barrier each side of the fire wall....

 

[Faithmaster]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Or through crimp the singles to some flex and push that through the wall.

 

[Engineer54]

Re: Not quite sure of this one... Conduit installed, but can singles go through mason

Or through crimp the singles to some flex and push that through the wall.

???? ....Do What???