Fire and life safety professionals are known to utter these words: Choose a device that is listed by a qualified testing laboratory or Check the device for the label of a nationally recognized testing laboratory. From time to time they may have a need for professional product, equipment, process or chemical testing, inspection and evaluation services from a nationally recognized testing laboratory. But how do you contact one of these laboratories? The U.S. Occupational Safety and Health Administration (OSHA) maintains a list of them. OSHA’s Nationally Recognized Testing Laboratory Program recognizes private sector organizations that can perform certification to make sure products meet the requirement for construction and general industry OSHA electrical standards.