problem with a 105-210w LV transformer...

[peugeot]

Hi,

I'm attempting to install the above transformer with 4 12V 35 Watt lamps wired in 1.5mm heat resist cable, all lengths less that 2m. It worked a treat until after about 2-3 hours the lights cut out. I allowed the transformer to cool (Though I cant understand why it got hot in the first place) and it worked again but not for so long. After another break I went to cool I turned it on and the transformer appears to have blown in some way.

Does the TX work horizontal to a wall or does it have to be flat, parallel to the ceiling for example? Can it be fixed to a wall --- or does there have to be free air all round? I'm struggling, as I believe I have followed all the rules and wiring is over spec. if anything.

Any ideas would be greatly appreciated.

thanks

 

[breezer]

cheap transformer.

 

[peugeot]

i was using one of these: http://www.screwfix.com/app/sfd/cat/pro.jsp?id=49365&ts=71067

could you point me in the right direction of a better version if this is indeed a "cheap transformer"

thanks

 

[breezer]

clicky

I should also point out they are NOT transfomers in the strict sense of the word. they also should not be covered with any insulation, such as you may find in a roof space

 

[bernardgreen]

Technical Helpline Available on 0870 444 1158 for Screwfix.

How warm was the area where the transformer was. Was it in a cavity between ceiling and floor with heat from the lamp(s) trapped in the same cavity.