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Old 07-08-2004, 08:06 AM
Franz Heymann
 
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Default soil heating cables for winter use/heating a greenhouse


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

"Chris French and Helen Johnson"


wrote in message ...


What's the problem here Franz? Soil warming cables, thermostats

etc.
all
standard kit intended for greenhouses - as is my mains electric

heater,

I would not go near mains heating cables buried in damp earth.

Full
stop.


Fair enough, but AFAIAC they are safe. Obviously I would not put it

in a
situation were I would be likely to damage it, - 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.

Low voltage units are available for this obvious reason.


I guess they are, though I can't actually think
of ever seeing them on sale.


I used to have one when I still had a greenhouse. It ran at 12 volts
and used bare soft iron wires as the heating elements.

Franz