NRTL (Nationally Recognized Testing Laboratory)

Outline for certification

The NRTL means the nationally accredited laboratory specified by the Occupational
Safety and Health Administration (OSHA) under the US Department of Labor.

Related directive

29 CFR Part 1910

Target items

electrical & electronic products, explosion-proof device, gas appliance (such as LPG-related appliance), and firefighting equipment (such as fire extinguisher and fire detection device)

Procedure

• document audit & review
• safety test / risk assessment
• manufacturer’s factory audit
• Creation of Certification Service Agreement
• certification marking

Period for acquisition

general household products - about 3 months / machinery, and gas equipment - about 1 year or more

Materials required

application form, product instruction manual, circuit diagram, main parts list, NRTL certificate of major parts (if not available, it shall be substituted by the parts test), information on applicant, information on manufacturing factory, and testing samples

Follow-up management

performance of annual after-audits in 2 - 4 times, and payment of annual fee