Check the electrical load and ensure that the sensors do not exceed the 10 Amp maximum. In this guide, we'll walk through these. In modern power systems, distribution boxes are the core equipment for power distribution and control, and their stable operation is crucial to ensuring the safety and reliability of power supply. The following paragraphs in this technical article present the most common modes of failure for equipment that is. Poor quality power is power delivered to a load that includes excessive or damaging changes such as voltage drops, voltage unbalance, voltage fluctuations, current unbalance, transients, and harmonic distortion. When one phase is doing more work than the.