In relation to listing, what must a low-voltage lighting system be to allow for different installation instructions?

A low-voltage lighting system must be listed in order to accommodate different installation instructions effectively. When a system is considered listed, it means that it has been tested and meets specific standards set by a recognized testing laboratory. This listing ensures that the system is safe for use and complies with applicable codes and regulations.

Being listed is essential for flexibility in installation, as it allows manufacturers to provide a variety of installation instructions or configurations that are still compliant with safety standards. This ultimately helps ensure that installations are performed correctly and safely, regardless of the specific setup chosen by the installers.

In contrast, terms like "approved," "certified," and "recognized" may imply some level of conformity to safety standards but do not inherently provide the same assurance and formal acceptance as being a listed product. Specifically, approval usually relates to local authority acceptance, certification often pertains to compliance with certain specifications without necessarily implying listing, and recognition can refer to a general acknowledgment without the rigorous testing associated with listing. Therefore, only a listed product provides the necessary assurance for varied installation instructions in the context of low-voltage lighting systems.