How safe is a wooden cabinet?

[ppppenguin]

I was surprised to find that some rubber pond lining was conductive,.....

My first thought is astonishment. My second thought is that perhaps it's carbon loaded and that makes it conductive.

Do you know what type of pond liner it was? Low density polyethylene(LDPE), PVC, Butyl rubber or EPDM?

The conductivity of butyl rubber with carbon loading has been studied: https://www.researchgate.net/publication...Composites