Listing or labeling of electrical equipment is performed by which type of organization?

• A. recognized testing laboratory (NRTL)
• B. insurance company
• C. manufacturing association
• D. utility company

Answer: (A)

Electrical equipment labeling and listing are done by independent testing organizations that are recognized for safety testing. These laboratories evaluate products against defined safety standards and, if they meet them, issue a listing or labeling mark (such as UL Listed, CSA, or ETL). This mark shows the device has been tested and approved for safe use in electrical installations, which is why it’s the correct type of organization involved.

Insurance companies handle risk coverage, manufacturing associations are industry groups, and utility companies provide power; none of these certify or label equipment for safety.