What does it mean for an electrical product to be listed?

• A. It has the warranty from the manufacturer for ten years.
• B. It has been tested and certified to meet recognized safety standards for its intended use.
• C. It is the most expensive product in its category.
• D. It is approved by the local utility company only.

Answer: (B)

Listing means the product has been tested and certified by a recognized testing laboratory to meet safety standards for its intended use. Labs like UL, CSA, or ETL evaluate the device’s design, construction, insulation, and performance and issue a listing mark with a file number. This safety certification is what codes rely on to approve equipment for installation. It does not imply a manufacturer warranty, higher price, or utility approval. Utility authorization is unrelated to listing.