Received a call that back porch lighting and their refrigerator was not working. After assessing the situation it looks like this was due to rust build up which caused the loss of continuity between the breaker and wire, in turn, meant there was no power going out. Through further troubleshooting, we found a 30amp breaker with 12 gauge wires (Against Code!) 12 gauge wire is rated for 20amp which defeats the purpose of a breaker protecting the integrity of the wire. We were able to fix the problem and will continue to troubleshoot every situation so mistakes like this are not missed.