In article
s.com, Luke scribeth thus
On Nov 7, 8:40*pm, tony sayer wrote:
I am pretty sure I am right, that a vacuum cleaner, which presents no
path to earth at all, and hence no means of providing a leakage
current, should not under any circumstances trip the RCD. That's
correct isn't it?

Luke

No its not if its a Neutral Earth short, then that can cause that with
no problems at all as can a lamp or anything else that causes currents
to flow.

The only exception might be a faulty or leaky "suppression" capacitor
that is permitting a current to flow from the Live wire in it to Earth
that can trip it.

Way to find out is to tray another load such as an electric fire on the
same circuit, tripping then Earth Neutral short very likely, no tripping
then prolly faulty caps in the vacuum cleaner..

--
Tony Sayer

Yes, but the vacuum cleaner has no earth cable and in any case I wired
it directly to the CU. There was no earth wire involved at all.

Won't be a leak from Live to Earth then!, prolly you do have an Earth
Neutral short...
--
Tony Sayer