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. Here are some solutions when a power distribution box fails: Safety First: Make sure you are safe. Check the power supply: Check whether the power input is normal. However, in actual applications, distribution boxes often encounter a series of problems, which not. Outdoor low-voltage power distribution boxes (hereinafter referred to as "distribution boxes") are low-voltage distribution equipment used in 380/220V power supply systems to receive and distribute electrical energy. When they start tripping, overheating, or making strange noises, it's more than just an inconvenience - it's your home's cry for help. In this guide, we'll walk through these.