In article ,
Sunbeam wrote:

that was the 1st thing I checked. The screws are not live but the
rocker switch and an area extending approx.12mm around it are
showing full voltage.

It is as though the metal bracket the rocker switch
pivots on has a voltage on it. A bit of surface dust
and condensation providing a conductive path to the
outside. Sounds like an iffy switch.

Perhaps this is a situation where you might consider
a high current pull switch instead, for future safety.

--
Tony Williams.