Hi all,
My problem is this :
I have just changed my consumer unit from a 4 fuse unit to an MK MCB type consumer unit. The incoming supply feeds 6 MCB's and an RCD. The RCD then supplies 4 MCBs, which I have run my mains power onto.
As far as I can tell, my entire house is powered from one ring. I can not find the riser for the first floor anywhere. I have run the old cable from the "Power" fuse to a 32A MCB. When I make the main isolation switch and then the RCD, the RCD trips, even when the power MCB isn't made. If I remove the wiring for the power, the RCD doesn't trip.
What would cause the RCD to trip? I have checked my earth connection and that is good. I have also checked (as far as I can) the ring main and it appears good.
I'm not fully conversant with the workings of an RCD and can't work out why it keeps tripping. There's obviously a fault on the ringmain, but I don't know where to start.
Any help would be much appreciated.
My problem is this :
I have just changed my consumer unit from a 4 fuse unit to an MK MCB type consumer unit. The incoming supply feeds 6 MCB's and an RCD. The RCD then supplies 4 MCBs, which I have run my mains power onto.
As far as I can tell, my entire house is powered from one ring. I can not find the riser for the first floor anywhere. I have run the old cable from the "Power" fuse to a 32A MCB. When I make the main isolation switch and then the RCD, the RCD trips, even when the power MCB isn't made. If I remove the wiring for the power, the RCD doesn't trip.
What would cause the RCD to trip? I have checked my earth connection and that is good. I have also checked (as far as I can) the ring main and it appears good.
I'm not fully conversant with the workings of an RCD and can't work out why it keeps tripping. There's obviously a fault on the ringmain, but I don't know where to start.
Any help would be much appreciated.