RCD Keeps tripping and not mcb and not on the same side as MCB

[Peter]

Hello hoping someone can urgently help with an issue I am having.

I am carrying out electrical works on a 2 bedroom flat that is being refurbished. All I have done is changed single sockets to double sockets. Taken away a socket that was spured off another socket. Moved some lights into the middle of the ceiling and moved 2 light switches.

I am also not sure if the fault was already there or not but everytime I plugged in something that draws a fair amount of power I.e heater or grinder it would trip the rcd. I thought it may be an rcd fault so I moved the mcb to the other rcd and changed the rcd I thought was faulty. Now what is happening is when you plug something in that draws power it stays on but still trips the same rcd that I changed even though the mcb is not on that rcd side ?

What could this be ?

 

[Lucien Nunes]

Likely to be a neutral-earth fault on a circuit on the side with the RCD that trips. Check the IR on all these circuits - it might have been pre-existing. The heavier the load, the more likely the trip, and it will happen regardless of which circuit the load is on.

 

[Midwest]

You probably have an earth neutral fault, either existing or one you've created.....…...too slow.

 

[-Matt]

When you moved the MCB to the other RCD, Did you also move the neutral over?

 

[westward10]

Test first, not later then you can be sure if faults are existing.

 

[buzzlightyear]

is the op a spark ? or some one pretending to be one .

 

[Octopus]

Any tests undertaken, other than the good old bang test?

 

[buzzlightyear]

other than the good old bang test?

5,4,3,2,1 .thunderbirds are go .

 

[Midwest]

Any tests undertaken, other than the good old bang test?

Mind you, them were the days. None of this faffing around with meters and bits of paper.

 

[buzzlightyear]

 

[Octopus]

Rcd's hadn't been invented then either

That's progress for you

 

[Taylortwocities]

When you moved the MCB to the other RCD, Did you also move the neutral over?

What he said^^^^^^^^

 

[Lucien Nunes]

But...

a) The problem was there before he changed anything in the board.
b) The circuit he moved now works, and doesn't trip its own RCD.
c) It trips mainly with heavy loads.

All three factors point at an N-E fault on any of the circuits on the RCD that trips, not necessarily the one that is loaded or the one he moved.

Sometimes I wonder if I'm the only person who actually reads the fault description before replying!

 

[MJPD29]

Do your testing first and find out exactly what it is changing rcds without finding the fault is false economy

 

[Midwest]

Sometimes I wonder if I'm the only person who actually reads the fault description before replying!

I know, and do they read what other members have posted as well, present company accepted.