Rain causes circuit breaker to blow
I have a circuit breaker that continually blows every time it rains very hard. Once it blows, it takes several days before I can reset the ciruit. Everything works fine when the weather is dry. This problem started about 3 months ago. The only items on this circuit are the light over the pool table, the light at the top of the steps, the light at the bottom of the steps, one standard outlet (that is never used) and the doorbell on the front of the house. There is no cover on the porch. Believing the problem to be the doorbell, I have replaced it and calked around it 3x but the problem persist. I have calked all around the door molding to make sure water is not seeping in. The lights have been installed for six years and had no problems until now. I have checked for moisture around the internal lights, but everything is totally dry. I replaced the circuit and the problem still persists. I am totally perplexed. Any ideas?