NRTL Nationally Recognized Test

NR natural rubber (polyisoprene) NRTL Nationally Recognized Testing Laboratory... 

Applying U.S. standards or safety methodology to product assessment increases the risks of nonconformity because there are fundamental technical and interpretation differences between the U.S. and EU views (ANSI/UL vs. EN/IEC). In the area of safety philosophy, the U.S. test agencies, known as Nationally Recognized Test Laboratory s (NRTL), stress fire and tests, whereas, the European bodies focus on shock and construction. Both camps generally consider all safety... 

All components and subsystems are listed or recognized by Nationally Recognized Testing Laboratory (NRTL) and/or validated by third party review. 

Some of the options involve proximity alarms or insulating links/devices. Effective November 8, 2011, Subpart CC at 1926.1401 defined proximity alarm and insulating link/device as devices that warn of proximity to power lines or that insulate against electricity and that have been ...listed, labeled or accepted by a Nationally Recognized Testing Laboratory in accordance with 29 CFR 1910.7 ( NRTL requirements ). These pieces of safety equipment must meet the performance requirements and the NRTL requirements as defined in Subpart CC at 1926.1401, Definitions, to be used on cranes and derricks in construction. 

The [components] used are eertified by a nationally recognized testing laboratory (NRTL)... 

Explosion-proof vacuum cleaners are specifically designed for use in areas where the presence of flammable gases, vapors or finely pulverized dust in the atmosphere are sufficient to create a threat of explosion or fire. The design of the vacuum must be legally certified and evaluated for hazardous locations by a Nationally Recognized Testing Lab (NRTL) approved by OSHA. Although many vacuum companies claim to offer explosion proof vacuums, it is imperative that you ask for proof of NRTL certification. 

The design of the vacuum must be legally certified and evaluated for hazardous locations by a Nationally Recognized Testing Lab (NRTL). 

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