mlaughlinnyc posted:Can a 15/16 volt old transformer of 40 to 100 watts cause a fire ? For how many years does the UL seal apply ?
Yes, a short in a 15v 40 watt transformer can cause a fire. Remember, the transformer is hooked up to 120V 15amp power minimum. That circuit can theoretically handle 1800 watts before tripping the breaker. I had a derailed train that I didn't catch very fast. It didn't throw my fast acting breaker for some reason. When I went over to put the car back on the track, smoke was rising! No fire, but left long enough, I am sure there would be.
That doesn't mean that you shouldn't use your transformer. Any transformer can do it. Yes, new ones have fast acting breakers, but folks here have advised to install those. With older transformers, you just need to make sure they are still mechanically and electrically sound. Don't use transformers with rotted or frayed power cords for example.
George
