Malibu transformer circuit breaker keeps opening
I have a 200 Watt Malibu Landscape transformer, with 100 feet of 14 gauge cable, 5 10 watt landscape lamps, and 2 50 watt spot lights connected. It has operated fine for several months, but now the circuit breaker on the transformer keeps opening after 5 minutes or so of use. After being reset, it will stay on for a few minutes and then open again. I've checked all connections and rewrapped the weather tape I used at the connections. Any suggestions as to what I can do or change? The transformer works fine when the cable is removed, so it has to be a load problem or short down the cable somewhere.