RCD TRIPPING after hoover gets plugged in

[ericmark]

THE BIG REVEAL!

The electrician came back today and he said he put one of the neutrals in the wrong RCD bars! 1 minute fix. All good.

I wonder how he missed it when doing the testing?

 

[EFLImpudence]

Neutral on the wrong bar would trip both RCDs.

Is that not correct?

 

[Taylortwocities]

I wonder how he missed it when doing the testing?

 

[securespark]

I wonder how he missed it when doing the testing?

Hmmmmm.......

 

[Yanni]

Sorry one more thing, I asked him why he did not do the insulation resistance test as some of you suggested and he said because he has to disconnect almost all the lightings and fittings and boiler etc in order to do that and as this was a fairly recent installation he did not feel he needed to do that. He said he mainly performs this test on older properties where there are rubber cables involved...

 

[flameport]

older properties where there are rubber cables involved...

Any property with rubber cables should have been rewired decades ago. Pointless to test such things.

 

[Scally-Ho]

My 1st house was wired in old lead sheathed rubber insulated cables. The slightest movement split the lead so the whole house was quickly rewired before our 1st child arrived.

 

[endecotp]

I asked him why he did not do the insulation resistance test as some of you suggested and he said because he has to disconnect almost all the lightings and fittings and boiler etc in order to do that

I bet someone can find a previous long thread about that. I honestly don't know what needs to be disconnected, if anything.

It should be possible to test L-E and N-E resistance without any concern about connected appliances. For L-N resistance at >250V, you may want to disconnect things. Unplugging things with plugs, turning off FCUs (e.g. boiler), and turning off light switches should protect them.

 

[Ragnar_AT]

Is that not correct?

I seem to remember that in OP‘s case only one RCD tripped.

 

[pete01]

Pete’s hat is safe!

Thank god, last time I had to eat my hat it was horrible

 

[EFLImpudence]

I seem to remember that in OP‘s case only one RCD tripped.

It did but no one has commented on your post.

Were you not correct in saying both should have tripped with the neutral in the wrong bar?

Does that not suggest the other might be suspect?

 

[Taylortwocities]

I seem to remember that in OP‘s case only one RCD tripped.

Isn’t it strange that so few people understand the trip characteristics of RCDs.

 

[martygturner]

Or the electrician could have popped the RCD N into the non protected N bar....

 

[EFLImpudence]

Or the electrician could have popped the RCD N into the non protected N bar....

Is there one?

 

[Taylortwocities]

Is there one?

Errrr yes! But you’d have to be real dumb to make that mistake.