Trouble Call: No One Knows Why Their Fuses Keep Blowing

Customer has a bunch of 120 volt control wiring that keeps blowing its fuses. They were unable to find the location of the short circuits. After some troubleshooting it was determined that two handholes had become hidden and forgotten over time. Mice or rats had found their way into one and had chewed through some insulation. The damaged wires were replaced and the system is operating correctly now.