A cavity wall is often an easy route to run a cable. What should electricians consider if they are considering running a cable through or down a cavity wall?

This question was raised following an eFIXX video review of the Hamilton Elemento outdoor sockets.
Check out the review    • MAKE YOUR OWN OUTDOOR SOCKETS & ACCES...  

Joe Robinson explores the issues raised in relation to UK wiring regulations and the potential problems relating to cable derating and polystyrene insulation.

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TIME STAMPS
00:00 Can I run cables in cavities
00:50 Will the cable be supported in the cavity
01:12 Derating with thermal insulation
01:40 Part C of the Building Regulations
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