Confusing tripping problem

M

MickM9

Hi guys, hoping someone on here can give me a clue whats happening here.

Basically my RCB is tripping out intermittently, it can happen at any time of the day or night without me doing anything.

HOWEVER, I can create a couple of scenarios where I can manually make it trip and was wondering if someone can give me a clue as to what might be happening.

I have recently installed some new pond pumps and filters to the garden pond and the first scenario where I can make it trip is by unplugging all 3 plugs (pump, filter, UV light) and replugging them, this WILL trip the switch.

BUT, if I leave the plugs in and reset the trip switch they will work. Sometimes for an hour, sometimes for hours on end with out tripping.

As this problem has only just started since I fitted these I thought it must be them, however even if I leave them unplugged I still have an intermittent tripping problem.

Thats why I think the above might be a bit of a red herrng just confusing the whole issue as the other scenario (where Ive got these pond plugs unplugged) that I think is the real reason is one of the isolation switches (washing machine) in the kitchen, whenever I switch this on it trips the switch BUT if I leave the isoloation switch on (after the RCBs tripped) and then reset the RCB the isolation switch is ok and will work (although it still trips intermittently).

However if I switch it off then back on again it trips immediately.

Im thinking that its either a faulty isolation switch or a problem with its wiring but Im not an electrician and certainly dont want to start opening things up that I dont understand so Im hoping someone on here can give me a few ideas as to what actually is wrong and is it something simple that can be sorted before I call an electrician in?

Cheers
Mick
 
It needs an Insulation resistance test and RCD test carrying out to identify if the problem is wiring related or equipment related. No amount of guess work will fix it.

Cheers...........Howard
 
Hi all, sorry for late replies, had to go out.

Anyway, the isolator switch that is tripping all the time is feeding a washing machine (not switched on).

Ive got an electrician coming round to have alook so I assume he'll do the insulation resistance test and RCD tests ?

Fitting a double pole isolator sounds a bit expensive, any idea of the sort of price I should be getting quoted if I mention it to the guy coming round, not that I think hell be trying to rip me off as hes my partners mate but it would good to have an idea of what Im going to be looking at ?
 

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