Be sure the clasp is not closed on insulation and that the conductive wires are installed in the proper opening on the DIN terminals and breaker. Check the electrical connections to the. Here are some solutions when a power distribution box fails: Safety First: Make sure you are safe. Regular maintenance is vital to ensure its safety, prevent electrical issues, and extend its lifespan. Long cable runs can result in a voltage drop, which can be solved by using a heavy gauge wire. Watch for warning signs like loose wires, burn marks, or moisture.