I have low power cable lighting fitted in my kitchen, 2 cables running in parallel with suspended spots. It has run fine for 8 years then the other day it blew when switching on. I looked at the transformer and there was a blown fuse so I replaced that and it worked.
It worked for about 8 hours then, again when switching on it blew again.
I replaced the fuse again, this is a small fuse on the transformer itself. Swapped the bulbs over to LED (from halogen), cleaned the cables to make sure nothing was arcing across from one to another. Then the same happened again it worked for some hours then blew when turning on at the switch.
What I need to know what is likely to be triggering this? I don't understand why it works for a number of hours and then goes. I would expect if it is overloaded or something it would go immediately.
Any ideas would be greatly appreciated.
Best Answer
Is the power source a simple transformer or a switch mode power supply? Changing the bulbs from halogen to led should greatly reduce the current draw so I doubt the lights are the cause. If you have a power supply, a cap or other component inside it may have aged and changed tolerance enough to cause an internal overload... the power supply went bad.