Voltage at light fitting that is turned off

[BillyTheSparks]

Thank you that would be handy, you can probably tell I've never done this before

 

[jeremy]

I'm probably barking up the wrong tree entirely, but have come across induced voltage problems before, which seem to have been caused by a disconnected cpc, 90-100V in one case. Have you checked the cpc?

 

[BillyTheSparks]

I'm probably barking up the wrong tree entirely, but have come across induced voltage problems before, which seem to have been caused by a disconnected cpc, 90-100V in one case. Have you checked the cpc?

Thanks for the advice Jeremy, but these have all been checked and cheaked again. Getting the voltage on the brown/grey when not connected to anything is definitely pointing to the conductance.

 

[topquark]

Limited choice on the packaging front. I'd probably go for this given your 2K2 Ohm choice: Buy High Power RESISTOR 50W 2K2 Vishay RCH50S22000JS06 online from RS for next day delivery.

Easy to solder some leads on for use and wrap in heatshrink for use. Should be easy enough to incorporate in the box(es).

 

[BillyTheSparks]

Limited choice on the packaging front. I'd probably go for this given your 2K2 Ohm choice: Buy High Power RESISTOR 50W 2K2 Vishay RCH50S22000JS06 online from RS for next day delivery.

Easy to solder some lugs on for use and wrap in heatshrink for use. Should be easy enough to incorporate in the box(es).

Thank you for your reasearch, a great help!!

If I have any more questions is it ok to bother you?

 

[topquark]

Sure just post away, there's always someone around.

 

[BillyTheSparks]

Limited choice on the packaging front. I'd probably go for this given your 2K2 Ohm choice: Buy High Power RESISTOR 50W 2K2 Vishay RCH50S22000JS06 online from RS for next day delivery.

Easy to solder some leads on for use and wrap in heatshrink for use. Should be easy enough to incorporate in the box(es).

Hi, I managed to get hold of these and they seemed better than the first lot I got hold of, I wired one up to a plugtop to see how hot they got. It lasted for about ten minutes, didn't get too hot, but then burnt it's self out.
Speaking to someone at the wholesaler and they have suggested that I could put an SES lampholder with a oven lamp in the ceiling void which will take the excess voltage out of the switch live.

Good Idea??

I'm not too sure. It would probably work but I dont fancy leaving something like that in the celing...

Is there any other suggestions that anyone can come up with?

 

[topquark]

Burnt out? What did you use as a heatsink?

 

[BillyTheSparks]

Burnt out? What did you use as a heatsink?

Errrmmm?? Nothing....

I just left it on the floor, to do it's merry business. It expanded slightly on the back, then it cracked and stopped working.

I really have no idea with this. I wouldn't have thought it needed a heatsink as surely it would have said it needed it on the paperwork?

 

[topquark]

Data from the spec:

Power at 25°C	50W with heatsink, 5.5W without heatsink
Resistance Tolerance	±5%
Temperature Coefficient	≤1Ω ±250ppm/°C, >1Ω ±150ppm/°C
Operating Temperature	-55°C → +125°C
Thermal Resistance	1.0°C/W
Limiting Element Voltage	1285Vac
Overload Voltage	2500Vac (Max.)
Dielectric Withstand Voltage	3.5KVac
Insulating Resistance	10000MΩ
Length	50 mm
Width	29.4 mm
Height	15 mm