GU10 lighting circuit problem

[Nick74747]

Hi,

I have a set of 4 GU10 recessed light fittings with halogen bulbs controlled by a single dimmer switch. The circuit was installed about 5 years ago and has worked fine. This morning 2 of the bulbs weren't working when switched on. I replaced one of the bulbs with a new one and for a moment the light worked then went out. I replaced the other 'failed' bulb in the other socket but again it didn't work (not even for a moment). It's possible that both bulbs failed at the same time but it seems unlikely that both of the new replacement Philips halogen bulbs would also be faulty. The other 2 lights are fine as several other circuits in various room containing up to 8 recessed halogen lamps.

I should be grateful for any advice offered.

Thank you.

Nick

 

[Squid]

If you have a meter you need to check if you have power to the choc block/connector then the it from there, if you get stuck then let me know.

 

[Nick74747]

Ah, no meter. That's why I was thinking I'd have to replace 2 blocks and holders. Many thanks.

 

[telectrix]

a voltstick would be the first test. then, if it lights up, a voltmeter or approve tester across L-N(with switch in ON position). if you have 230 (ish)V, then it's the lamp.

assuming they are 230V fittings, and that cable clamp should be over the outer grey sheath, not the brown/blue conductor insulation.

 

[Squid]

Ah, no meter. That's why I was thinking I'd have to replace 2 blocks and holders. Many thanks.

If you need a hand or a meter then let me know as if you are close to me I can pop around and test them for you, I am talking about if you are close to the Harrow Road/Kensal Green area.

I did a job for my sons mate are they the horrible small lamps?

 

[Toneyz]

These fittings are not made off correctly the gray sheath should be inside the enclosure and what has happened to the CPC (earth) I think somewhere along the circuit a cable has come out not made in the fitting (loose) or is broken from the pressure of the clamp. I would see if you have power at the fittings first before you conclude it is the lamp holder.

 

[Octopus]

Those look like they were converted from MR16 to GU10 ........... badly

 

[Andy5678]

Could do with a tidy up and someone with a meter who knows what they are doing

 

[Eliza Bennett]

Definitely sounds like faulty bulbs. The LEDs ought to consume less power than the halogens they are replacing (which typically consume 20-50W each in GU 10 size), and since you said you can run the fixture with all six halogens installed with no problem, your problem is not simply that six 7W LEDs were too much for your circuit in combination with all the other loads.

See if you can isolate the problem to one specific bulb out of the six by only installing one bulb at a time. It could be a short in one of the bulbs due to a manufacturing defect.

 

[DPG]

Is he fitting LED lamps?