This morning my daughter turned on the TV (took it out of standby) and it tripped the RCD. I isolated the TV and managed to reset the RCD but whenever I plug in the TV, which is a 37" Toshiba LCD TV, after about 5 seconds it trips the RCD again.
The TV is 16 months old and still under warranty. The wiring is about 8 years old and this is one of 4 ring mains in the house which covers the lounge, and two bedrooms. It is quite a long ring and the furthest from the consumer box.
The TV is double insulated even in so far as the plug has a plastic earth pin, so I thought the leakage current would be through the aerial or via one of the scart leads through the PVR or the DVD but even with everything disconnected it still trips the RCD. I even put the TV on a wooden table in the middle of the room and plugged it in to a different socket on the same circuit and still it trips the RCD.
I then put the TV in the kitchen which is on a different ring and it was fine . This ring is nearer the consumer box and so is slightly shorter.
One thing that is interesting is that when it trips the RCD, even after unplugging the TV and walking into the garage (20 secs say) , I can't reset the RCD until I isolate the ring it was plugged into by switching off the MCB.
If I wait about a minute I can then re-enable the MCB and the RCD stays on, until of course I plug in the TV again.
I can only assume that the TV power supply is injecting some harmonic or may be DC (if thats possible) back into the ring which is upsetting the RCD.
Anyone any thoughts?
The TV is 16 months old and still under warranty. The wiring is about 8 years old and this is one of 4 ring mains in the house which covers the lounge, and two bedrooms. It is quite a long ring and the furthest from the consumer box.
The TV is double insulated even in so far as the plug has a plastic earth pin, so I thought the leakage current would be through the aerial or via one of the scart leads through the PVR or the DVD but even with everything disconnected it still trips the RCD. I even put the TV on a wooden table in the middle of the room and plugged it in to a different socket on the same circuit and still it trips the RCD.
I then put the TV in the kitchen which is on a different ring and it was fine . This ring is nearer the consumer box and so is slightly shorter.
One thing that is interesting is that when it trips the RCD, even after unplugging the TV and walking into the garage (20 secs say) , I can't reset the RCD until I isolate the ring it was plugged into by switching off the MCB.
If I wait about a minute I can then re-enable the MCB and the RCD stays on, until of course I plug in the TV again.
I can only assume that the TV power supply is injecting some harmonic or may be DC (if thats possible) back into the ring which is upsetting the RCD.
Anyone any thoughts?