Hi, I had to replace a PIR security light for my nans garage at the weekend. I isolated the circuit via the sub board in the garage so the circuit I was working on was dead (I proved this out prior to starting). However during the process of unwiring the old security light and wiring in the new light the RCD in the house tripped a number of times (split board CCU).
This still occurred even when I switched the MCB off for the sub board at the main CCU in the house. I have spoken to others who have advised of similar issues of RCD tripping when working on isolated ring final circuits in houses.
My question is, "Is there a common practice used other than complete isolation of the CCU to stop this occurring"
Thanks
This still occurred even when I switched the MCB off for the sub board at the main CCU in the house. I have spoken to others who have advised of similar issues of RCD tripping when working on isolated ring final circuits in houses.
My question is, "Is there a common practice used other than complete isolation of the CCU to stop this occurring"
Thanks