How to Identify: If you notice that your distribution box's breakers are hot to the touch or smell burning, it's an indication of overheating. How to Fix: Check the load on each phase of the system. The following factors cause the cable to heat up abnormally: The cable is not produced in accordance with national standards for standard cross-section. Inductive heating, which typically occurs when phase conductors are routed around metal mounting channels, supports, or braces, can cause catastrophic and deadly failures in electrical distribution and control equipment. High demand circuits are especially at risk for inductive hearting since the. 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. They cause a local temperature increase, which worsens the contact quality even further as the current increases.