A common mistake made by many is to replace existing lamps with lamps of higher wattage than those originally installed. As an example, Mr. Smith has a low volt system with a 600 watt transformer and 25 fixtures illuminating his landscape. All of the original fixtures had 20-watt lamps in them for a total load on the transformer of 500 watts.
When he went to replace the lamps, he added ten 50-watt lamps, and fifteen 20-watt lamps. What he has done is increase the wattage demand from 500 watts to 800 watts thus overloading the Transformer. Overloading the transformer will cause the Transformerâ€™s Circuit Breakers to Trip thus shutting the system down!
Solution: Reinstall lamps with the same wattage as the originals.