Labeling on service equipment helps installers by:

• A. Increasing voltage ratings.
• B. Clearly indicating live parts and circuit boundaries.
• C. Removing labels after installation.
• D. Reducing maintenance frequency.

Answer: (B)

Labeling on service equipment provides a clear map of what parts are live and where each circuit runs. This improves safety by showing exactly where energized parts are, so workers know what to avoid and what to de-energize before starting work. It also marks circuit boundaries, helping installers and inspectors quickly identify which breaker controls which circuit and preventing mix-ups between wires. Labels can also convey important details like service voltage and component ratings, aiding proper operation and future maintenance or upgrades. Labels don’t increase voltage ratings, aren’t removed after installation, and don’t reduce maintenance frequency; their purpose is identification and safety.