Be sure that the power distribution box has sufficient power provided to it. Long cable runs can result in a voltage drop, which can be solved by using a heavy gauge wire. Check for proper IP/NEMA ratings and material quality. Ensure safe placement: install in. The vehicle battery may only be disconnected when the Check Control message indicates that the additional electrical storage in the instrument cluster (KOMBI) has been completely switched off. Be sure the clasp is not closed on insulation and. In modern electrical systems, cable distribution boxes (also known as electrical distribution boxes or distribution boxes) play a crucial role as the key hub for managing, distributing, and protecting circuits.