ICC Residential Electrical Inspectors Practice Exam

What must circuit identification for panel boards include?

1. A detailed usage report

2. A diagram of all circuits

3. A directory located inside an approved location on the panel door

4. Color-coded labels for each circuit

The correct answer is: A directory located inside an approved location on the panel door

Circuit identification for panel boards is a critical safety and convenience feature that ensures users can easily understand which circuits supply power to which areas or equipment. For each panel board, having a directory located inside an approved location on the panel door is required. This directory provides a clear and concise labeling system that helps electricians, inspectors, and homeowners quickly identify the function of each circuit. This is important for both troubleshooting and emergency situations, as it allows for quick access to circuit information without having to guess or trace individual wires. The location of this directory is also essential; it must be in an approved location on the panel door so that it is readily accessible and visible when the panel is opened. This placement enhances safety and adherence to electrical codes, as it facilitates efficient identification of circuits during inspections or repairs. Other options, while they may contribute to better organization or safety, do not fulfill the specific requirement for circuit identification as mandated by electrical codes. A detailed usage report or a diagram, for instance, might not be practical or necessary for day-to-day operations, and color-coded labels, while helpful, are not a substitute for a clearly defined directory that meets code requirements.