Steve wrote:
I have seen tin-plated copper wire in some older installations; that
looks silver. Are you sure its steel ? Is it magnetic ? If its silver
right through, its probably aluminium, and I personally would remove
every last bit I could find.

Steve


I hadn't considered aluminium - I'll check with a magnet next time I
have access to it. A good excuse to go under the floor again...

Thanks

Ewan