Hello all,

I was teaching this week and the fire alarm guy was round servicing the big panel in the entrance hall.  The panel sits there with no wiring showing, so it must be wired from “round the back” so to speakso of course curiosity got the better of me and I wandered around the reverse of the wall….

nice job, yes?  The original installer has glanded off everything into an adaptable box so the tails can pass straight through the wall to the other side.  The bottom left one is a real fat one so must be a multicore cable, perhaps a seven core.

I have pulled down the shroud to the right of it to let you see closer. This is real class cable and not mush installed these days. In class, I only have one bit of advice, look out for “Billy the burr”

This is a not too clear picture but that does not matter.  Billy lurks deep inside the pot and is a little wisp of copper that peels off and bridges the cores when screwing the pot on.  Watch out for him, he is bad news!

Till next time, see ya!