OSHA’s Nationally Recognized Testing Laboratory (NRTL)

OSHA NRTL accreditation is crucial for workplace safety and reliability, protecting workers and businesses in various industries.

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OSHA’s Nationally Recognized Testing Laboratory (NRTL)

Written by Vishal Ranjan | Updated: September 10, 2025

OSHA’s Nationally Recognized Testing Laboratory (NRTL) Program authorizes private sector organizations to certify certain items to guarantee that they meet OSHA electrical standards for both construction and general industry. Each NRTL is known for a certain set of test standards, and each NRTL has its own registered certification mark(s) to indicate product compliance to the relevant product safety test standards.

The list under OSHA’s NRTL includes Applied Research Laboratories of South Florida, Bay Area Compliance Laboratories, Bureau Veritas Consumer Products Services (BVCPS), CSA Group Testing and Certification Inc., DEKRA Certification, Eurofins Electrical and Electronic Testing NA,Inc., FM Approvals, International Association of Plumbing and Mechanical Officials EGS (IAPMO), Intertek Testing Services NA, Inc. (ITSNA), Lab Test Certification, Nemko North America, NSF International, QAI Laboratories, QPS Evaluation Services, SGS North America, Solar PTL, Southwest Research Institute, TUV Rheinland of North America, TUV SUD America, TUV SUD Product Service GmbH, and Underwriters Laboratories.

ANSI C37.44, ANSI Z83.26, ASME A17.5, CPLSO-14-2016, ANSI Z21.89, ANSI Z8.1, and AAMI ES60601-1:2005/(R) 2012, CSA/AM Z21.1, CSA/AM Z21.5.1, CSA/AM Z21.5.2, FM 1221, FM 1110, FM 1635, FM 2000, FM 2008, FM 1321, FM 1333, CSA/AM Z83,18, CSA/ANSI C22.2 No.336, FM 3990, and FM 7260 etc.

All these standards are practiced in various industries to ensure efficient production and maintenance of equipment and systems. These standards help focus on the minute details and opt for effective ways to manufacture reliable equipment.