Lamps constantly blowing - Help!

[haddy]

Called out to a shop yesterday, they have 4 wall lights which go through an unusually high turnover of lamps on a random basis.

They are halogen lamps on the same circuit but different switch from several fluorescents(no problems with the fluo's).

Fittings look ok, wired in T&E which looks ok. Didn't test them as I didn't have my megger handy.

Anyone got any suggestions? What is the most likely reason for this?

 

[Sidewinder]

100 lamps for

 

[Theorysparky]

+1

there is not a dimmer involved ?????

these cause this type of problem in domestic properties

 

[Revved Up Sparky]

Called out to a shop yesterday, they have 4 wall lights which go through an unusually high turnover of lamps on a random basis.They are halogen lamps on the same circuit but different switch from several fluorescents(no problems with the fluo's).

Fittings look ok, wired in T&E which looks ok. Didn't test them as I didn't have my megger handy.

Anyone got any suggestions? What is the most likely reason for this?

I was called out to a simllar job last week and the problem was caused by overheated and burnt contacts.... which I suspect was caused by the customer changing the lamp himself and not getting a good contact between lamp and contacts---

 

[revjames]

I was called out to a simllar job last week and the problem was caused by overheated and burnt contacts.... which I suspect was caused by the customer changing the lamp himself and not getting a good contact between lamp and contacts---

You always were a dab hand at lamp changes.....

 

[Evans Electric]

Ah! , getting mixed up here between Revved up Sparky and Revjames , must pay more attention.

I'm going with cheapo lamps and perhaps finger marks on glass . Wonder if they are the open uplighter things with insects committing suicide on the lamp.

Enclosed fitting may be getting too hot, reducing lamp life. This problem is not usually down to wiring probs TBH.

 

[matt.leung]

when replacing lamps, never touch the outer envelope with ur hands, as it creates black spots, due to the natural skin oil.. when this deposite is left behind and the lamp warms up, it creates a weak point, so the lamps blow....

 

[haddy]

Cheers folks, reckon the dirty fingers explanation could be the winner. So simple, hadn't even crossed my mind as I was trying to think too deep on this one!

Ps. First time on this forum, already got more sense than I ever got on screwfix...

 

[Sidewinder]

haddy,

Please DO NOT Blaspheme it is Un Holy!

 

[Theorysparky]

Cheers folks, reckon the dirty fingers explanation could be the winner. So simple, hadn't even crossed my mind as I was trying to think too deep on this one!Ps. First time on this forum, already got more sense than I ever got on screwfix...

you mentioned that word !!!!!!!!!!

suprised you not got any groans for that !!!!!

 

[Apache]

you mentioned that word !!!!!!!!!!suprised you not got any groans for that !!!!!

Think he's seen the light!



Welcome to the forum!

 

[septiclecky]

you mentioned that word !!!!!!!!!!suprised you not got any groans for that !!!!!

Whats that

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

 

[batty]

Maybe they are leavinhg them on constantly being a shop.

 

[PC Electrics]

Seems to me Haddys question hasn't been adequately answered. I too have a client where lamps keep blowing. The lamps in question are Osram and Sylvania halogens (GU10 and PAR 20), so not cheap rubbish and the client is getting pee'd off changing them.

 

[Badger]

Whats thatSCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

SCREWFIX

:Salute :coffee

 

[Larnacaman]

Maybe they are leavinhg them on constantly being a shop.

GU10 halo's always did have a bad reputation for longevity, no-matter who's make they were. They definitely don't stand up very well in a shop situation where they are on all day and well into the evening too....

Personally, i think a lot of the problems are down to the actual light fittings, that may look good but do little or nothing to help disperse the generated heat from these lamps. In fact i would even go as far as to say, ...that many of these fittings are the Prime cause of early lamp failures.....

 

[revjames]

I think (read) somewhere that lamps (filament types) last longer when switched by thyristor ie electronic dimmer. This is because they start on a rising +ve half cycle...

Just my 2p worth which probably not even worth that.....