Twin and earth external use.

[Derrick]

Can twin and earth be used in an external twin brick cavity wall? In no way open to the elements.

 

[snowhead]

Can you meet the manufacturers requirements for support i.e clips?

 

[Dustydazzler]

yes and no , yes you can fish a cable through a cavity wall to avoid chasing it out but no in the respect it remains unsupported.

 

[Lister1987]

yes and no , yes you can fish a cable through a cavity wall to avoid chasing it out but no in the respect it remains unsupported.

And depends of the manufacturer has approved/tested for such application. I'm thinking interaction with those small beads used on cavity wall insulation

 

[Derrick]

Can you meet the manufacturers requirements for support i.e clips?

Low brick wall so no clips. 100mm cavity.

 

[Derrick]

Low brick wall so no clips. 100mm cavity.

Cable to just lay

 

[telectrix]

sounds to me like a dwarf wall in a conservatory. very common to see cable run in cavity, esp.when the inner wall is not to be plastered.

 

[Derrick]

sounds to me like a dwarf wall in a conservatory. very common to see cable run in cavity, esp.when the inner wall is not to be plastered.

Dwarf wall yes. Extends from the house with brick on edge as capping. By the way, thanks for responding to my question?

 

[telectrix]

2 points.
1.is there insulation in the cavity? if so, cable laid on top is supported, but could be derated, current wise if insulation on top.
2. might be cavity ties to cable tie on. another form of support.

 

[Derrick]

2 points.
1.is there insulation in the cavity? if so, cable laid on top is supported, but could be derated, current wise if insulation on top.
2. might be cavity ties to cable tie on. another form of support.

No to 1and 2. Wall 5 brick high 10’ long already built. I want a light at the end and have laid twin and earth in the bottom. Just checking it’s ok? No water, light or insulation.

 

[telectrix]

might not be 100% to regs, but be OK.

 

[Derrick]

might not be 100% to regs, but be OK.

What should I have used? SWA not needed as protected by wall.

 

[GBDamo]

What should I have used? SWA not needed as protected by wall.

I'd have gone for a HO5RN-F.

A rubberised flex which will cope well with any dampness in the cavity.

 

[Derrick]

I'd have gone for a HO5RN-F.

A rubberised flex which will cope well with any dampness in the cavity.

FAB. Appreciate it.

 

[LastManOnline]

Can twin and earth be used in an external twin brick cavity wall? In no way open to the elements.

I run t&e in cavity when possible but always use flexible conduit as an extra protection.