Kitchen appliances load

EFLImpudence · 18 Jun 2019

The figures might be slightly different - I cannot find them - but not too much.

However, the MCB is obviously second hand and might be less than perfect.

I would have it changed.
Contact the electrician, if you had the CU changed, and ask him to change it free of charge.

chivers67 · 18 Jun 2019

Not sure Why it doesn't say "Kitchen Sockets" if it is indeed separate?

What other MCBs have you got to the left? Also the clear plastic Windows are to mark the MCBs Up not ultra important i know but the sort of thing I'd do to make it look perfect.

JohnW2 · 18 Jun 2019

Ghummy said:
Does the same still apply in the scenario i have a fridge/freezer and a chest freezer on the circuit

Yes, more-or-less.

As has been suggested, one theoretical possible explanation would be if the motors of all of the appliances happened to come on simultaneously (since motors can draw much more current than usual for the first few seconds) - but, statistically speaking, that's extremely improbable.

As EFLI has said, particularly given that it is older than all the others (and hence quite possibly 'secondhand'), it would probably make sense to have that MCB replaced.

Kind Regards, John

echoes · 19 Jun 2019

If all three appliances' heating elements were on, the fridge compressor kicking in might give enough current surge to trip an MCB.
Just a thought.

JohnW2 · 19 Jun 2019

echoes said:
If all three appliances' heating elements were on, the fridge compressor kicking in might give enough current surge to trip an MCB. Just a thought.

That's more-or-less what has already been suggested but, although I accept that it's not impossible, it does seem pretty unlikely ...

The additional start-up current surge of a compressor motor will presumably be far too brief to thermally trip an MCB, even if it is already 'fully loaded' by other things (e.g. heating elements of appliances). That presumably means that it would have to be a magnetic trip and, even with all those elements running, that would still require a start-up surge considerably more than 100A to trip a B32 - and that seems improbable.

Kind Regards, John

JohnD · 19 Jun 2019

Was it wired by an electrician, or a kitchen fitter?

echoes · 19 Jun 2019

You could well be right @JohnW2.

I can recount 2 similar experiences.
1) washing machine + fridge plugged into a 3 way socket with 13A fuse: fuse blew regularly.

2) 115V isolating transformer plugged into an otherwise unloaded 20A radial circuit sometimes tripped the B20 MCB.

flameport · 19 Jun 2019

Ghummy said:
It was a new consumer unit fitted and i assumed it was all new

The BS3871 circuit breaker is at least 25 years old.

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Kitchen appliances load

Similar threads