Voltage Track

Low Voltage Transformer Problems?
I have a 240 to 12 volt electronic transformer for each 50w halogen bulb. Trying to track down a fault, I tested the transformer with my multimeter - it showed 240v input but showed zero v output so I concluded that the transformer was faulty BUT when I plugged in a bulb it lit up normally. Can anyone explain ??
Different kind of voltage. Did you switch your multimeter to read DC voltage?
Most lighting "ballasts" are ac output (like fluorescent or metal halide). In the case of mr16 50w light bulbs typically power is 12v dc output from either an electronic or magnetic transformer. Magnetic is heavy iron with copper wound like a typical door bell transformer. Electronic is smaller and lighter using circuit boards to convert the voltage.
In both cases it will be DC.
Something else to consider is worn contacts where the bulb connects. And m16 bulbs don't last very long. Oil from your hands will shorten their lifespan even more. Also poor heat dissipation through the fixture.
I've worked with a lot of the types of fixture you're speaking of.
(usually 4" recessed cans but also pendants and track fixtures)
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Linkin Park Live @Rock Am Ring 2001 - High Voltage [Track 6]
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