What is the definition of equipment or materials marked by an organization acceptable to the authority having jurisdiction?

The definition of equipment or materials marked by an organization acceptable to the authority having jurisdiction is "labeled." This term refers to products that have been evaluated and tested by a recognized testing laboratory, demonstrating compliance with specific safety standards. A labeled product typically has a label attached to it, indicating that it has been tested and meets the safety and performance criteria set forth by the relevant authorities.

In the context of the National Electrical Code, labeling is crucial as it assures users and inspectors that the equipment or materials in question have undergone rigorous evaluation and are deemed safe for use in electrical applications. This helps maintain safety and reliability in electrical installations and systems.

On the other hand, "listed" refers to products that have been tested and found suitable for a specified purpose and are included in a list published by a recognized testing organization. Although sometimes used interchangeably with labeled, listed specifically indicates a more formal inclusion in a database of certifiable products.

"Certified" generally refers to products that have met specific standards and received verification from a recognized authority. However, it does not convey the same direct implication of user-facing labeling as the term labeled does.

"Approved" indicates that a product meets the requirements established by the authority having jurisdiction; however, it does not specifically imply that