An outside light we have used to cause a 'trip out' sometimes if it rained. I could find no sign of water ingress, so for safety I put the coach light on a two pole isolator breaker circuit. I also fitted an energy saving bulb. I then began to notice, when isolated, the light would flash on and off, about twice a second, but this decreased in frequency (the event) and eventually stoped.
Then after a gap of some months I noticed the same effect in our hallway, again a neon type bulb. When the switch is in the off position the bulb flashes dimly.
In reaching for the bulb to take it out, and before actually touching it, I was puzzled to find the light continues to flash, but at nearly full brightness. Withdraw the hand and the flashing again becomes very dim.
What is happening? Is this the AC somehow still making a circuit, (with the switch off yet somehow earthing), or is static involved? What is my hand doing to the bulb (or the bulb doing to my hand for that matter)?
2006-09-12
09:16:53
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11 answers
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asked by
mike s
2