Which of the following markings might indicate third-party compliance on a mounting strap?

• A. Manufacturer's ID
• B. Point of Manufacture
• C. Wire Rating
• D. 3rd Party Test Compliance

Answer: (D)

Marks indicating third-party compliance mean an independent testing body has verified the part against safety standards. On a mounting strap, seeing a marking that denotes third-party test compliance signals that an outside organization tested the strap and confirmed it meets applicable safety requirements, which helps ensure it’s acceptable for code-compliant installations and reduces the risk of unsafe performance. The other markings tell you who made the part, where it was manufactured, or its electrical rating, but they don’t indicate independent verification of safety standards.