Strange Tripping

[vbyrne]

Well lads
i have a strange tripping problem
i have a split board main switch and two 30ma trips
with a number of mcb's the fridge circuit is a 16amp mcb's on a radial circuit wired in 2.5 t+e it keeps blowing the trip every couple of hours but it keeps blowing the trip on the other side of the board
any body ever come across this kind of thing before

 

[Richard Burns]

I would probably refer you to this post I made a short while ago.

 

[sparksburnout]

Well lads
i have a strange tripping problem
i have a split board main switch and two 30ma trips
with a number of mcb's the fridge circuit is a 16amp mcb's on a radial circuit wired in 2.5 t+e it keeps blowing the trip every couple of hours but it keeps blowing the trip on the other side of the board
any body ever come across this kind of thing before

Yes, unfortunately poor grammar and lack of punctuation are quite common.

 

[dlt27]

Definately neutral to earth fault. I had exactly the same thing once. When
under load the neutral to earth fault trips the RCD. It was a neutral trapped by a metal wall light. Whenever a load from a circuit was switched on it traveled through the neutral to earth fault (imbalance) and caused the RCD to trip. The fault is probably on another circuit and load from fridge is causing to trip. Megger all circuits until you find it.