Which statement about labeling requirements under NEC Articles 690 and 705 is true?

Which statement about labeling requirements under NEC Articles 690 and 705 is true?

• A. They provide safety warnings, inverter information, and array information
• B. They require no labeling
• C. They provide only inverter information
• D. They require only array information

Answer: (A)

Labeling under NEC 690 and 705 is about making essential system information and safety reminders visible to anyone who might install, inspect, or service a PV installation. The statement that best fits is that labels provide safety warnings, inverter information, and array information. Safety warnings alert you to hazards such as shock, arc, and fire risks and remind you that DC electricity from the array can be present. Inverter information conveys the nameplate data—ratings like maximum input voltage and current, output rating, model, and possibly efficiency—so you can design and protect the system correctly with appropriate disconnects, wiring, and overcurrent protection. Array information includes the photovoltaic array’s electrical characteristics, such as open-circuit voltage and short-circuit current, which are used to verify that wiring, fusing, and conduit sizing stay within safe limits and that the array is operated within its rated conditions. All three types of information together ensure safe operation, proper maintenance, and code compliance; labeling that includes only one aspect would fail to provide the complete, practical data needed for the entire life of the installation.

Labeling under NEC 690 and 705 is about making essential system information and safety reminders visible to anyone who might install, inspect, or service a PV installation. The statement that best fits is that labels provide safety warnings, inverter information, and array information.

Safety warnings alert you to hazards such as shock, arc, and fire risks and remind you that DC electricity from the array can be present. Inverter information conveys the nameplate data—ratings like maximum input voltage and current, output rating, model, and possibly efficiency—so you can design and protect the system correctly with appropriate disconnects, wiring, and overcurrent protection. Array information includes the photovoltaic array’s electrical characteristics, such as open-circuit voltage and short-circuit current, which are used to verify that wiring, fusing, and conduit sizing stay within safe limits and that the array is operated within its rated conditions.

All three types of information together ensure safe operation, proper maintenance, and code compliance; labeling that includes only one aspect would fail to provide the complete, practical data needed for the entire life of the installation.