Electrical Inspection, Testing and Certification Practice Exam 2026 – Comprehensive All-in-One Guide for Exam Success!

The term “overcurrent” refers to a condition where the current exceeds the rated capacity of a circuit or device. In electrical systems, every circuit and device is designed to handle a specific maximum current, known as its rated capacity. When the current flowing through the circuit or device surpasses this limit, it can lead to overheating, equipment damage, or even electrical fires. This situation prompts protective devices, such as fuses or circuit breakers, to trip or blow, thereby interrupting the flow of electricity and preventing potential hazards. Understanding overcurrent is essential for ensuring the safety and reliability of electrical installations, as it is a fundamental consideration in designing systems and choosing protective equipment.