Apr 1, 2020
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Liverpool
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I've struggled to find a way into the soffits for some of the downlights I'm fitting.

I figured that I could drop the cable from the upstairs soffit and run a short way along wall/frame of my house before dropping it into the lower soffit.

I guess what my question comes down to is whether it's safe to run a 1.5mm twin and earth (flex) around a wall this way.

The orange square is where it leaves the loft/soffit. The orange line is where I've ran it so far. And the blue box is where I want it to enter the lower soffit.

It's not wired at the moment, wanted to run this by this forum before I finish the job. I was advised by a friend this would be OK, but as many opinions on this as possible is appreciated - it being safe is my first concern.

As I say, it's quite a short distance and for the most part is pinned to the underneath of the wood you can see, but I want to make sure.

Thanks in advance!

wiring.png
 
The cable needs to be suitable for outdoor use so it does not degrade from solar radiation, this would not include T&E cable. Does the circuit you are extending have additional rcd protection.
 
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The cable needs to be suitable for outdoor use so it does not degrade from solar radiation, this would not include T&E cable. Does the circuit you are extending have additional rcd protection.

Thanks for the reply mate.

I say T&E, it's 3-core.

The product name is: "3 Core Rubber Flexible Cable 1.5mm² 3183TRS Black" - if that helps?

This will be coming from the upstairs lighting circuit, it has RCD I believe.
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I can't amend the original post but just to confirm - this is TRS cable.
 
Last edited:
That type of cable should be fine.
 
Thanks again mate, much appreciated.
 
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You'll need to secure it with at least some fire resistant clips,(if you haven't), it is no longer permitted to exclusively use plastic fixings.
 
I'm not sure enough could fall down from that run in a fire to present a hazard though. But still, heat proof clips are always good advice.
 
I don't see how that cable could collapse in a fire?
The regulation concerned does not make any allowance for engineering judgement to be applied. If it will not stay in place as originally secured in the event of fire it will not comply.
 
The regulation concerned does not make any allowance for engineering judgement to be applied. If it will not stay in place as originally secured in the event of fire it will not comply.

It also doesn't say it must stay in place as previously secured.
It says we must prevent premature collapse in the event of a fire
 
It also doesn't say it must stay in place as previously secured.
It says we must prevent premature collapse in the event of a fire
I disagree with your interpretation of the regulation. IMO all wiring systems are now required to remain largely in place when subjected to heat.
 

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Liverpool
If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
United Kingdom
What type of forum member are you?
DIY or Homeowner (Perhaps seeking pro advice, or an electrician)
If other, please explain
None

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Title
Is my external wiring dangerous?
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UK Electrical Forum
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DanMcLiverpool,
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