What is the purpose of labeling at terminations and along the run?

• A. To identify circuit, function, source, and destination for maintenance.
• B. To decorate the cable jacket.
• C. To increase cable length.
• D. To make labeling visible only during installation.

Answer: (A)

Labeling at terminations and along the run is about giving clear, lasting identification for each cable so technicians can quickly understand what it is, what it does, where it came from, and where it goes. This information—circuit number, function, source, and destination—lets maintenance staff troubleshoot, verify correct connections, and safely power or de-energize the right circuit without guesswork. It also supports future upgrades or changes by making the cable’s purpose obvious years after installation.

Labels should be placed at the endpoints (where the cable connects to devices or panels) and along the run at key points (such as bends, splices, or changes direction) so the path can be traced easily. They must be durable and legible, not something only visible during installation, so they remain useful for ongoing maintenance and safety.

Decorating the jacket, increasing cable length, or limiting visibility of labels to installation time do not meet the practical goals of wiring maintenance and safety labeling.