split load rccb tripping

[alanr1948]

hi. anyone with a straight brain to help please. ive fitted a crabtree split load c.u. On one side i have smoke alarms 1 lighting circuit and 2 ring sockets. protected by a 80amp rccb. these circuits are working and ok. on the other side 3 lighting circuits and 2 ring sockets with the other 80amp rccb. 4 of the circuits are ok. but when i connect the second ring circuit and plug anything in it trips the rccb but not the mcb. it doesnt seem to be the ring circuit itself. I disconnected it at the c.u. and put a single remote socket into the mcb and it still trips when i plug anything into it. anyone any ideas please as ive run out of cash for a pro troubleshooter. thanks

 

[Wontdothatagain]

Before you fitted the cables into the new CU, what Zs readings did you get and what IR reading did you get for each circuit??????????????

 

[westie101]

Check all the neutrals go to the correct sides of the board.

 

[securespark]

Small Scotty Dog has it right. Make sure all neutral conductors are connected to the corresponding busbar. it sounds like there is an imbalance on that ring final, ie the neutrals of that "faulty" circuit are not connected through the same RCD as the lines.

 

[securespark]

Small Scotty Dog has it right. Make sure all neutral conductors are connected to the corresponding busbar. it sounds like there is an imbalance on that ring final, ie the neutrals of that "faulty" circuit are not connected through the same RCD as the lines.

 

[westie101]

Woof!

 

[Taylortwocities]

Is there an echo in here tonight?

 

[alanr1948]

will check the neutrals in the morning and will let you know thanks for the help and will get back to you

 

[alanr1948]

thanks westie and securespark. you were spot on. i had put the last 2 neutrals on the main switch neurtral bar and not on the rccb bar. great info and so i can sleep tonight

 

[westie101]

Woof, woof, woofety, woof
^^^^^^^^^^^^^^^^ Blame securespark!

 

[Taylortwocities]

Good boy!

Walkies!!!!