Labeling aids safe operation and maintenance by:

• A. Decorating the panel.
• B. Serving as the primary energy source.
• C. Placing clear circuit and disconnect information for quick reference.
• D. Eliminating need for safety procedures.

Answer: (C)

Labeling provides clear, quick identification of what each circuit does and where its disconnect is, so technicians can safely de-energize the right parts of the system and verify energy-off conditions before starting work. A good label or directory tells what a breaker controls, the location of the disconnect for that area, and key specs such as voltage and amperage, giving a reliable reference during service or emergencies. This supports proper lockout/tagout, reduces the risk of accidental energization, and speeds troubleshooting. It does not decorate the panel, it isn’t a energy source, and it doesn’t replace safety procedures; those remain essential.