Lamps Blowing

[sl1210]

hi guys,

went to look a lamp blowing problem today

would a insulation resistance reading of 0.50 mega ohms on suspect lighting circuit with all lamps removed be the reason why 2 wall lights, 1 ceiling pendant and 1 bathroom lights lamps keep blowing. there are another 4 lights on the circuit which don't have any problems.

strange

cheers

 

[Lighthouse Phil]

First thing I would be checking would be the supply voltage to the house. I've come across light bulbs etc rated for 220V, in houses with a higher supply voltage, say 240V, the bulbs work, but only for a short time before they burn out.
I had this in my house, the transformer is in my garden, so I'm first on the line, I have a high voltage, 235V+, so I make sure any lamps I buy are rated for 240V, and not the more common 220V.
(PS, located in Ireland)

 

[Farmelectrics]

Check voltage as said above voltage surges would blow lamps as well no way of monitoring that had problems with this in past fitted loads of gu 10s in different areas same ones most places ok but others would blow in other areas head wrecking

 

[sl1210]

but why only 4 out of the 9 lamps in the flat are blowing?

so its nothing to do with the IR readings then?

 

[EastAnglian]

so its nothing to do with the IR readings then?

No! A low IR reading will give you earth leakage problems (hence fire RCDs) or in the extreme cause a L-N short-circuit which will blow a fuse/trip a MCB if you are lucky, or start a fire if you are not!

 

[Johnuk]

could be there cheap pound land gu10 lamps,

 

[bigbaddave]

could be there cheap pound land gu10 lamps,

How much do they cost there??

 

[Hiddo]

How much do they cost there??

25p each but they sell em in 4 packs.....

 

[jibjob]

Might be the fittings, ES can often be problematic, particularly the older they are. The little tabs in the fitting are spring loaded, over time they weaken & fail to make good contact with the lamp. Many GU10's are of very poor quality, why not have a go with CFL or LED lamps.

 

[sl1210]

the two wall lights are ses golf balls. the bathroom light is a 40w capsule lamp and the other light is a standard bc. apparently they are all good lamps they keep putting in.

well i'm going back in the morning. going to fit two new wall lights and one new bathroom fitting. fingers crossed

 

[Clive P]

Hi,

I know everybody talks about loose Neutrals, but that was exactly what happened to me some years ago. Lamps were constantly blowing in a foyer of an Office, traced it back to a loose Neutral in a JB; corrected that, not a problem since then,

Regards.