class 1

. Duplicate https://www.diynot.com/diy/threads/replacing-c1-with-c2-ceiling-light-what-to-do-with-earth-wire.557809/

I have a 100mm drain pipe which will go through my foundations at a depth of 1m. The manhole is outside the footings of the extension so it only the protection of this clay drain I need to be concerned about. The foundations are very deep, up to 2.4 meters. I am thinking of something like...