When examining equipment for safety, it is the intent of the Code that ___ internal wiring or the construction of equipment need not be inspected at the time of installation of the equipment if the equipment has been listed by a qualified electrical testing laboratory.

• A. factory-installed internal
• B. field-installed
• C. underground
• D. raceway

Answer: (A)

When equipment has been listed by a qualified electrical testing laboratory, the safety check relies on that listing to certify the unit as a whole. The internal wiring and construction that were fixed by the manufacturer are considered tested and approved parts of the listed equipment, so they do not need to be re-inspected at the time of installation. This is because the listing ensures the factory-made wiring and overall construction meet safety standards. If wiring is added in the field or if the equipment isn’t listed, then those parts would require inspection. The other options don’t address the idea of relying on the manufacturer’s listed, factory-installed wiring.