Electrician's Licensing Practice Exam

Is the statement true or false? NEC requires a panelboard circuit directory.

1. True

2. False

3. Only for commercial buildings

4. Only if multiple circuits are present

The correct answer is: True

The statement is true because the National Electrical Code (NEC) does indeed require a circuit directory for panelboards. According to NEC Article 408.4, every panelboard must have a directory that clearly identifies the circuits and the areas or specific loads they serve. This requirement is important for safety and operational efficiency, allowing anyone who interacts with the panelboard to quickly and easily identify which circuit corresponds to which branch of the electrical system. The directory is considered essential not just for new installations but also for modifications or repairs, ensuring that future electricians can easily understand the layout of the circuits. It contributes to safe working conditions by minimizing the risk of accidentally working on the wrong circuit, which could lead to hazards such as electrical shock or damage to devices. The other options suggest more limited requirements that do not align with the broad scope of NEC provisions regarding circuit directories, reinforcing the necessity of having this feature in all applicable installations.