armoured cable SWA

[John Rumm]

I once had case where expanded foam melted through a over sleeve on a WC connector. Don't know what type of plastic it was though.

[Huge]

Or more likely, they're specifically made for that. Foamed polystyrene is banned in some jurisdictions.

[Richard]

Thanks Jim that makes sense now - where did you get min bending radius figures BTW?

[Richard]

Excellent - thanks for the advice!

[Martin Bonner]

Well with luck, he'll get a BIG box of electrical stuff as well as those ...

[Andy Hall]

Use a long, thin SDS drill and drill at a downward angle. I used about 30 degrees last time. By means of measurement and calculation, you can determine the exit point on the outside of the wall.

When the drill is through, use a larger, shorter drill and drill following the same angle from both sides. This avoids breakout of the brick.

Using an angle like this means that you don't need to worry so much about minimum bending radius and the cable will enter more neatly.

Threading SWA through a cavity can be challenging. For this, I used a piece of cane or similar, putting it through the hole. A length of garden hose can be threaded over it and through. The remove the cane and insert SWA. It will follow the hose to the exit point. Then you can pull the hose away and voila.

[Andy Hall]

What was her name?

[John Rumm]

I would have asked, but I had a mouth full ;-)

[Appin]

The message from Andy Hall contains these words:

A bit tricky if your entry point is at (or below) ground level on the outside :-)

An exercise which is a trifle more tricky when one is dealing with stone walls 2'6" thick :-)

Surely a case for the modern electrician's fibreglass rods which are totally and absolutely fantastic.