RCD Tripping for certain load in kitchen sockets

[Arum2011]

30mA RCD keep tripping for high power appliances such as kettle, hoover, mixer etc but not tripping for Radio, hot plate, mobile charger etc. Checked continuity
L-N, L-E, N-E all seems OK, no shorting found. Good earth bonding also sockets metalbackbox all earthed. Same RCD works fine with other circuits. Any suggestions to fault finding why high earth leakage for certain appliances and how to fix Thanks for helping.

 

[Murdoch]

Could simply be accumulated leakage from all the appliances or a more sensitive rcd

you really to get the rcd tested by somebody with a proper tester

 

[ProDave]

"no shorting found"

What were you measuring with and what voltage?  That does not sound like a proper insulation resistance check.

Have you PAT tested the appliances plugged in, one (or more) of the appliances could have an insulation fault.

 

[kerching]

A continuity test does exactly what it says on the tin, continuity. It won't test for leakage at those sort of test voltages ( usually about 9V dc)

needs proper testingfor IR

PA testing and possibly Earth leakage test

 

[Arum2011]

Thanks ProDave I used a pocket multimeter  for Continuity and Voltage tests. No insulation checks done

All appliances working in other house sockets without tripping.

 

[Arum2011]

Is there any cheap multi tool I can buy for insulation /earth leakage test any suggestions please

Yes Kerching  Yes 9v  multimeter correct

 

[Murdoch]

Your best bet is probably to hire a local spark who will have all the kit and knowledge.

£50 ish for 1 hour