- Reaction score
- 10
I was asked to help a friend who had an issue with a lighting circuit tripping the main switch. I found a burnt switch and faulty light. Circuit back on, all was good. As I always do I went round checking all room lights. Upstairs landing light had no bulb, got a bulb and put it in. It came on. No matter what position either of the upstairs or downstairs switches were in. Getting 190v at the rose. When the 2 way switche was operated it went to full brightness. I was in all the switches testing so I presumed I had maybe got something wrong in the 2 gang switches. Disconnected and belled everything out. Marked up as all wiring is red( circa 1940's) and reconnected. Still the same. I asked if this has always been the case and why bulb was out and they said it never worked properly but they could switch it off. I exchanged the energy saver for a 60w bulb and the light was off and the 2 way circuit works perfect. No issue with any other lights or the other gang downstairs. Tested switch just using resistance multimeter. OK. Could it be leaking or could the insulation be breaking down inside the conduit onto one of the switched lives. Only live and neutral at ceiling rose.