new ceiling light comes on during powercut Ask questions and find answers to many subjects relating to electrics and electrical work

[debbiejohn]

my friend had a 2nd ceiling light installed in the hall feeding from the original, I think. A 2nd light switch has also been added, so that you can switch off either end. During a recent short powercut, the new light remained on, but dim. (she had used a dimmer bulb by mistake). What caused this and is it dangerous :?:

[rosebery]

You said "had a 2nd ceiling light installed". That implies they paid someone to do it. The remedy is to get that person back in at his/her cost to sort it!

Cheers

[sparx]

Hi,
you say during a power cut, it may have been what is known as a
'brown-out' (NO sniggering at the back!).
It means a very low voltage still on system, not enough to operate any equipment but if it's a low energy lamp which was on at the time it may still glow on dimly.
Unless it stays on when turned off during normal operation I would not worry.
If it's a normal filament lamp which glows when turned off then it needs investigating,
regards Sparx

[debbiejohn]

Thx for the 2 replies. It was a qualifed electrician who installed it but didn't know the answer. As my friend is an elderly widow who wanted a 2nd opinion I said I'd try on line for her.
I will pass on the info given by 'Sparx' thank you.