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. The good news is that most issues are easy to troubleshoot, especially if you follow the steps below. Do not touch live parts, turn off the corresponding power switch to avoid the risk of electric shock. Check wires/DIN terminal clasps to. An electrical panel box, also known as a breaker box or electrical distribution panel, is the central hub for electrical power in a building. It is typically located in a basement, garage, utility room, or other accessible area.