Exploding bulbs!

[Dambo]

Hey guys,

I know there's been a recent thread regarding light bulbs blowing continuously but a job I've been on today took this a step further.

The customer needed some unrelated electrical jobs doing but whilst there he told me he's had a relatively long standing problem of bulbs blowing regularly and even sometimes exploding out of the fitting!!! I've never heard of that happening before. I carried out some electrical testing on the circuit wiring and all the results came back clear.

I also measured the supply voltage and it was 247V which I though could well be the reason but, when consulting the local electricity board, they said anything upto 253V is acceptable.

As suggested on a previous thread the bulbs could be an issue but I don't think that is the reason in this case as the customer has tried buying the dearer GLS bulbs in order to rectify the problem but it hasn't made any difference.

Has anyone come across exploding bulbs before??? Any advice would be greatly appreciated as this is a fire hazard if i've ever seen one.

Cheers

 

[lineman]

See it frequently mate usually leaves the cap in the fitting, requiring removing with pliers. Again no definitive answer to it other than very poor lamps which are poorly constructed. Only other point to note is that the dno may state that acceptable nominal voltage but the lamps are invariably rated at 240v AC.

 

[Andy™]

not sure sure about the 'exploding' part, but been to many jobs to remove the base from holder when the glass has shattered. not sure whats caused it to shatter though, but it often makes a large less

 

[SPECIAL LOCATION]

See it frequently mate usually leaves the cap in the fitting, requiring removing with pliers. Again no definitive answer to it other than very poor lamps which are poorly constructed. Only other point to note is that the dno may state that acceptable nominal voltage but the lamps are invariably rated at 240v AC.

I think you will find that manufactures 240v or 230v rating will be a nominal value and they will be well aware of the acceptable percentage fluctuations in the voltage of the countries they sell their products too.

It is not a new phenomena that the actual voltage can be greater or less than the nominal value.

Hey guys,I know there's been a recent thread regarding light bulbs blowing continuously but a job I've been on today took this a step further.

The customer needed some unrelated electrical jobs doing but whilst there he told me he's had a relatively long standing problem of bulbs blowing regularly and even sometimes exploding out of the fitting!!! I've never heard of that happening before. I carried out some electrical testing on the circuit wiring and all the results came back clear.

I also measured the supply voltage and it was 247V which I though could well be the reason but, when consulting the local electricity board, they said anything upto 253V is acceptable.

As suggested on a previous thread the bulbs could be an issue but I don't think that is the reason in this case as the customer has tried buying the dearer GLS bulbs in order to rectify the problem but it hasn't made any difference.

Has anyone come across exploding bulbs before??? Any advice would be greatly appreciated as this is a fire hazard if i've ever seen one.

Cheers

erm????

you thought 247v was a problem?

Did you not cover nominal voltage and the percentage tolerances in your training? headbang

Cheap poor quality lamps..

unless of course they are 110v lamps ???

They blow quick in a 230v supply!

 

[SLIPSHOD & SLAPDASH]

I have also seen this many times. ALL light bulbs are cheap tat nowadays, whatever name is on the box. Most are made in Poland with 2nd hand machines i have been told.

 

[SPECIAL LOCATION]

I have also seen this many times. ALL light bulbs are cheap tat nowadays, whatever name is on the box. Most are made in Poland with 2nd hand machines i have been told.

Well considering we recently had that below standard cable with incorrect amount of copper in the conductors...

it is NOT beyond the realms of possibility that some lamps are been manufactured with less rigorous quality control!!!!!

:C

 

[batty]

When the bulbs blows how far does the soil/earth spread.

 

[SteveT]

When the bulbs blows how far does the soil/earth spread.

You have to flower everything up and gild the lily!!