i/r ON FRIDGE

[morph]

Have no experiance on this sort of thing so sorry if sound stupid

readings on suspect dodgy fridge
are about 12 M
simply i tested at 250 V , L-E. N-E ,

Does that sound dodgy or as expected ?
its an american style one

thanks

 

[morph]

ahem

oh the shame in bumping

 

[fuzzydunlop]

I presume you left it plugged in and tested at the CU?

Try Connecting L/N then test L/N to E

12m ohms is still good

 

[Specialist]

Hi Morph: To be honest I would'nt be complaining about a 12 Meg reading. Only thing is: On any Domestic appliance you should link the L / N pins together & test from them to the Earth. I know it's sometimes difficult to link the L / N pins but if your going to be doing a lot of appliance testing i'd make up a lead / socket to do it.

 

[Ponty Massive]

Why are you testing the fridge, are you getting a problem with tripping etc?

 

[fuzzydunlop]

Double post

 

[morph]

yep rcd is tripping regular
i have added a rcbo to split the two rings but the kithen ring is still tripping the rcd rcd is fine i changed it i know the fridge is leaky as plugged in i get a ramp test of 5 mA less than when tested at c/u
i just did an i/r test by using the plug with a normal tester ie not a pat tester
i have tested cables and i get 999M ohms so i think it is fridge but i cant be 100 % i tested fridge and got 12 M ohm which seemed low , bot stuck now

 

[fuzzydunlop]

Regular as in regular time

Or regular as in every hour?

*edit* Was going to expand to what specialist says below

 

[Specialist]

Ok you need to do the test again with the L / N connected & see what you get, when you say normal tester I take it you mean a 500v Megger ? If your getting 12 Meg then to all intents & purposes this is a pass, but it may be tripping when the Compressor drops in & American style uprights are known to have some serious problems. A look at: www.ukwhitegoods.co.uk might pay Dividends as there's a lot of info on there about issues with these.

 

[morph]

regular is wrong term realy
once at night, sometime here and there
happened twice today while i was there today
then ok for 5 hours then just triped again
seems to be happening more frequently

 

[Goody]

...so i think it is fridge but i cant be 100 % i tested fridge and got 12 M ohm which seemed low , bot stuck now

Connect the fridge to another socket on another RCD (if possible) using an extension lead and see if it trips, then it's definitely the fridge; n'est-ce pas?

 

[Ponty Massive]

Not the correct way to solve the problem but, I normally keep a plug in RCD socket adaptor in the van. Change RCBO for MCB and plug the fridge into the RCD adaptor. If it trips, there's your problem !!!

 

[morph]

Ok you need to do the test again with the L / N connected & see what you get, when you say normal tester I take it you mean a 500v Megger ? If your getting 12 Meg then to all intents & purposes this is a pass, but it may be tripping when the Compressor drops in & American style uprights are known to have some serious problems. A look at: www.ukwhitegoods.co.uk might pay Dividends as there's a lot of info on there about issues with these.

yep i done that, i am thinking compressor myself too , a few weeks ago the fridge defrosted radomnly then started working again by itself

 

[morph]

Connect the fridge to another socket on another RCD (if possible) using an extension lead and see if it trips, then it's definitely the fridge; n'est-ce pas?

have asked customer to do this and await results

 

[fuzzydunlop]

If you're getting 12m you know its good, put it on its own circuit non RCD side

The regs do allow it for certain equipment

*edit* others have said to switch RCD, it doesn't really help the client with their expensive fridge,