"2pods" wrote in message
...
I've also ran an armoured underground cable out to the back of the garden.

i.e rcd to waterproof junction box, cable to other junction box feeding a
waterproof 13A socket and a waterproof switch. Which,once everything is
running, would feed the two teeny pumps (both less than 1A).

However, at the mo', if the switch is turned on (still no pumps wired yet)
it trips the rcd.
Switch turned off, everything OK.
Is it because there is nothing wired to the switch yet ?

TIA Peter


Sounds like you have a short somewhere in the wiring. Take a multimeter, or a
cheap electrical continuity tester and test for a short in the wiring, possibly
a frayed wire, or improper grounding.