"Chris French and Helen Johnson"
wrote in message ...
In message , Franz Heymann
writes

"Chris French and Helen Johnson"

wrote in message ...
but otherwise I
don't
see a problem. mine sits in the wooden propagator box in damp
sand
the
cable is insulated and sealed. If it was to develop a fault in
the
insulation then it would just trip the RCD anyway.

Only if the propagator itself is connected to earth.

And how would I earth a wooden propagator? :-)

Stick a metal peg into the damp soil and connect the peg to another
one driven into damp soil in the "real earth".

The cable itself is earthed of course.

That would not help you in this case, unless I misunderstand what you
mean by "the cable itself is earthed".

(though if you have mains electricity in a GH then yes I guess any
metal
work such as staging etc. should be earth bonded.

It would be good practice to do so.

Franz