New circuit for induction hob, rcd tripped off

[danieljamesscott]

Hi,

I had an electrician install a new 45A circuit for an induction hob (replaced the gas hob). It is connected to a 63A RCD in a split load consumer unit (Other RCD is 80A) along with the rest of the kitchen appliances oven/microwave/etc).

While cooking dinner yesterday, we had the oven, microwave and induction hob (2 rings) all going and the RCD tripped. I'm not sure, but I think it happened when we turned the microwave on. I flipped the RCD back on and it was all OK again.

Is it possible/likely that we were drawing more than 63A? How can I test/check this? Is it possible to get my electrician back to upgrade the RCD a higher current?

Is it possible to test whether an RCD is getting 'close' to the amp rating?

Thanks,

Dan

 

[chivers67]

I think it more likely there was a slight Earth leakage that tripped it rather than overload but difficult to be certain.

 

[Colin Brenton]

An RCD won't trip on overload, they don't (can't) even detect it. MCBs provide over current protection, the RCD provides earth leakage protection.

 

[securespark]

MCBs also provide short circuit protection.

 

[Colin Brenton]

MCBs also provide short circuit protection.

Very true, I was bound to forget something

 

[EFLImpudence]

A short-circuit current is overcurrent.

MCBs also provide overload protection.

 

[securespark]

I'll just go back to dribbling uncontrollably in my wing chair.....

I knew it was over something ...

 

[EFLImpudence]

 

[danieljamesscott]

Thanks. So I guess I should try and reproduce it, to narrow it down?