In article ,
"harrogate" writes:

Find out who fitted the RCD and 'expose' him. Domestic supplies protected be
by an RCDat no more than 30mA - or 10mA on a workbench supply with
electronic equipment.

Wrong.
If this is a whole house RCD, it has to be at least 100mA.
A 30mA one would be against the regs.
If the original poster is refering to a lighting circuit,
that really shouldn't be on a 30mA RCD anyway.

--
Andrew Gabriel