How should equipment that is reconditioned be identified, as required by the Code?

Reconditioned equipment must be properly field-labeled to indicate that it has been restored to a safe and operational condition, complying with applicable codes and standards. This requirement ensures that end-users are informed about the status and suitability of the equipment for its intended use. Such labeling typically includes information regarding the reconditioning process, compliance with safety standards, and any necessary warnings or instructions for safe operation. Proper field labeling contributes to the safety and reliability of electrical installations and informs others who may come into contact with the equipment.

The other choices do not provide sufficient identification or safety information. A lack of labeling could result in misuse or misunderstanding about the equipment's condition, while service warnings alone do not convey the full context of reconditioning. Similarly, simply having a serial number does not address the critical need for safety and compliance information associated with refurbished equipment.