a puzzler can anyone explain it ?

[vjsmarwick]

Was at a house tonight that has 15 GU10 led fittings with 1.2W lights.
They are in 3 rows of 5 the 2 outside rows are on together and switched from 1 end and work fine.
The middle row are 2 way switched but when switched off always have a slight glow !
Any one have any ideas why ? I have changed the bulbs around and nothing changes checked the
switches and they are all perfect but still only the middle row glow any ideas guys ?
I changed the bulbs to 1.3W ones tonight and it has stopped them glowing but I still cant explain
why the 1.2W ones glow and would like to find a reason for future reference ?
They were all from Wicks's except for the 1.3W's they were from B&Q just in case anyone else has
had similar problem.

 

[telectrix]

induced voltage in the 2 way switching. fitting a snubber usually cures the problem.

 

[Brightspark2]

Or put the bulbs in the garden and put some lamps in...

 

[Farmelectrics]

Tel does it matter were you put the snubber or is it the end of line you put it

 

[Rockingit]

Deja Vu...... !!

 

[vjsmarwick]

:43:

Or put the bulbs in the garden and put some lamps in...

mmmm normally a brighspark is seen just before it goes poof and life ends lets hope you have not peaked too soon ?

 

[telectrix]

Tel does it matter were you put the snubber or is it the end of line you put it

bit of trial and error. generally across the load just to leak away the induced voltage.

 

[Deleted member 26818]

What is a snubber?
Is it some sort of gizmo that is manufactured specifically for this, or is it something like a resistor you install yourself?

 

[telectrix]

generally a capacitor, or a combination of resistor and capacitor.

 

[SYKRAPS]

I have had the same issue at a job that I did a week or so ago.

I reported it to the supplier and as tel says it will only happen in the 2-way controlled areas and there is currently being developed an identical looking lamp that has a capacitor installed I believe that will cure the issue.

CEF are sorting it out for me and they have all of the information you will require.

 

[KevinS]

What is a snubber?
Is it some sort of gizmo that is manufactured specifically for this, or is it something like a resistor you install yourself?

take a neon out of an old fused spur and use that, wire it in (across the load) somewhere out of sight. Problem solved!

 

[KevinS]

I reported it to the supplier and as tel says it will only happen in the 2-way controlled areas and there is currently being developed an identical looking lamp that has a capacitor installed I believe that will cure the issue.

is the company either collingwood or halers?

 

[telectrix]

i think theakstons are working on the problem. target is 9 pints , then the lights go out.

 

[Deleted member 26818]

I usually use a 240kΩ wired across the load.
I find this works with CFLs as well.
I was just wondering if someone had now started manufacturing something that may be a little more robust.

 

[Golden_Boy]

I usually use a 240kΩ wired across the load.
I find this works with CFLs as well.
I was just wondering if someone had now started manufacturing something that may be a little more robust.

240 k is an unusual value ? Not falling into the e12 range at all !!! ( 120 -150 -180 -220 -270 -330 -390 ) !!