P
Piratepete
Hi Guys
Help! The 6 amp MCB for a downstairs lighting circuit keeps tripping, sometimes instantly, sometimes slowly. An IR check live to earth gives >200 Meg on the 250 Volt range (I don't want to blow up the dimmers!) when all light switches are OFF! This reduces to near short circuit when you put ANY switch in the ON position. Why?
Lights, switches and dimmers in all the rooms work as they should.
Domestic installation, about 10 years old. TNCS, 16th Edition box. Very difficult to fault find because no pendants with a loop circuit. Rooms either have wall lights or downlights. Dimmer switches in all rooms. All switches are metal plate. I've opened up most of the switches to check for pressed wires. There are no outside lights, bell transformers or smoke alarms on the circuit. Isolating an extraction fan makes no difference.
I'm hoping the solution is obvious, but it was a 4pm job ad I was already brain dead1
Cheers
Pete
Help! The 6 amp MCB for a downstairs lighting circuit keeps tripping, sometimes instantly, sometimes slowly. An IR check live to earth gives >200 Meg on the 250 Volt range (I don't want to blow up the dimmers!) when all light switches are OFF! This reduces to near short circuit when you put ANY switch in the ON position. Why?
Lights, switches and dimmers in all the rooms work as they should.
Domestic installation, about 10 years old. TNCS, 16th Edition box. Very difficult to fault find because no pendants with a loop circuit. Rooms either have wall lights or downlights. Dimmer switches in all rooms. All switches are metal plate. I've opened up most of the switches to check for pressed wires. There are no outside lights, bell transformers or smoke alarms on the circuit. Isolating an extraction fan makes no difference.
I'm hoping the solution is obvious, but it was a 4pm job ad I was already brain dead1
Cheers
Pete