I recently bought a variac for testing some old audio gear, it had a Europlug but contained an adaptor for UK plugs. The only thing was despite having an ordina

I recently bought a variac for testing some old audio gear, it had a Europlug but contained an adaptor for UK plugs. The only thing was despite having an ordinary metal earth pin the adaptor never actually made contact with the existing plug's earth connector. That could have been dodgy!