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Guy King wrote:
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from The Natural Philosopher contains these words:

tumble driers trips rcd

Or if you're feeling foolhardy and brave, open the plug and disconnect
the earth wire to see if it still does it.

definitely foolhardy. A pocket multimeter will tell the OP whether the
tumbler is leaking, one probe on E and the other on L&N with it
switched on will tell you. Yes I know it only catches 99% of cases -
thats a simple easy quick way to almost always tell you whats going on.


A pocket multimeter won't indicate a lot of problems but is still worth
using.

On all machines there are suppressors which are connected between earth -
neutral and earth - live. I would suggest if you see such a can isolate it
from earth by undoing the earth tag or stud and making sure the case is
insulated from the drier body. Neutral - live suppressors won't give rise
to earth currents.

It's a shame there aren't cheap gadgets to measure imbalances in live and
neutral currents. Mind few cheap multimeters measure AC current!