Kitchen under cabinet lights tripping

Carl Lewis · Mar 29, 2015

Hi,
I have just changed my under counter cabinet lights. but every 5 (about) i switch them the MCB trips. there is 3 starters and 1 led strip lights coming off each. Each LED strip is 11w, so shouldn't be an issue. I have done a bit of trial and error and its seems it will trip with 2 sets on and it doesn't matter which 2, so it doesn't seem i have a faulty set... unless they are all faulty?

Advice please

Carl Lewis · Mar 29, 2015

is upgrading my mcb from 6 to 10 an option?

telectrix · Mar 29, 2015

maybe. or a type C 6A. all depends on your Zs.

Engineer54 · Mar 30, 2015

telectrix said:
maybe. or a type C 6A. all depends on your Zs.

That has now totally buggered him, the next question wil be, ...What's this Zs then?? lol!!

Deleted member 9648 · Mar 30, 2015

There's a surge on starting from led drivers.It's likely that is the problem. As already stated the answer is (assuming your mcb is a type b) to change it to a type c of the same rating. A type c is slower to react to short duration surges. It is essential to verify that a change of mcb will still meet the disconnection times for the circuit so an electrician should verify this first.

mungo2007 · Apr 2, 2015

I think C Class breaker is the answer for this we have had this happen a few times (but normally on much larger installs) and the breaker change has resolved the problem every time.