What is UL in electricity?
The UL-Listing seal, also known as the “Underwriters Laboratory” seal, that is stamped on most electrical products is an important mark that products carry. It used to be an insurance industry organization, but now it is independent, non-profit organization.
What does the UL symbol mean?
" " UL stands for Underwriters Laboratories, an organization that has been around for more than 100 years. If you visit the UL Web site at www.ul.com, you can find the following description: "UL is a world leader in product safety testing and certification.
What does UL stand for in wire?
Underwriters Laboratory (UL) categorizes AWM as a Recognized Component used in Listed or Classified products. AWM is commonly used in a variety of applications such as general purpose wiring circuits, control circuits and internal wiring of appliances.
What is the meaning of UL Listed?
UL Listed Mark (all variations) UL Listing means that UL has tested representative samples of a product and determined that the product meets specific, defined requirements. These requirements are often based on UL's published and nationally recognized Standards for Safety.
Does electrical equipment need to be UL listed?
There is no law in the U.S. requiring UL certification. But commercial building and electrical codes as well as retailers may require it. And if you produce a product designed to meet specific safety criteria or it might pose a safety risk, you definitely need testing.
How do you tell if an appliance is UL approved?
Straight from the Underwriters Laboratories' help page, here is what you need to look for when identifying a proper UL label:Look for the UL trademark! ... Right under the UL trademark, the word LISTED or CLASSIFIED will appear in all capital letters.Under LISTED/CLASSIFIED you will find what the product is.More items...•
What is UL voltage rating?
UL 1277, the standard for electrical power and control tray cable, was recently updated, allowing manufacturers with UL approved tray cable to market their product as 600V/1kV rated. To be dual rated, products must use a recognized 1kV rated conductor and pass a higher voltage AC Hipot test on the completed cable.
What is UL fire rating?
What is the 1 Hour UL fire rating? The most widely recognized industry standard for commercial quality fire safes is the UL Class 350 1-hour fire rating. This means that when the safe is exposed to external temperatures of over 1700° F, the internal temperature of the safe will not exceed 350° F for at least one hour.
What is UL approval for?
UL approval offers assurance that the safety and performance claims behind a product have been thoroughly verified by a third party. UL is also an accredited standards developer in the U.S. and Canada, setting industry standards for manufacturers that innovate new products.
Why is UL listing important?
UL Recognition ensures the safety and efficiency of machinery used by workers. It also empowers companies to strive for more sustainable practices. Because UL Recognized focuses on components, UL ensures that the equipment is properly housed.
Overview
UL, LLC is a global safety certification company headquartered in Northbrook, Illinois. It maintains offices in 46 countries. Established in 1894 as the Underwriters' Electrical Bureau (a bureau of the National Board of Fire Underwriters), it was known throughout the 20th century as Underwriters Laboratories and participated in the safety analysis of many of that century's n…
History
Underwriters Laboratories Inc. was founded in 1894 by William Henry Merrill. Early in his career as an electrical engineer in Boston, a 25-year-old Merrill was sent by underwriters issuing fire insurance to assess risk, and investigate the World Fair's Palace of Electricity. In order to determine and mitigate risk, Merrill found it necessary to conduct tests on building materials. Upon seeing a growi…
UL Standards
• UL 106, Standard for Sustainability for Luminaires (under development)
• UL 110, Standard for Sustainability for Mobile Phones
• UL 50, Enclosures for Electrical Equipment
• UL 50E, Enclosures for Electrical Equipment, Environmental Considerations
Recognized Component Mark
The "Recognized Component Mark" is a type of quality mark issued by Underwriters Laboratories. It is placed on components which are intended to be part of a UL listed product, but which cannot bear the full UL logo themselves. The general public does not ordinarily come across it, as it is borne on components which make up finished products.
Computer benchmarking
UL offers the following computer benchmarking products:
• 3DMark
• Easy Benchmark Automation
• PCMark 10
• PCMark for Android
Similar organizations
Applied Research Laboratories (ARL) A competing testing laboratory, based in Florida, U.S. Bureau Veritas A competing test, inspection, and certification company. Baseefa A similar organization in the United Kingdom. Canadian Standards Association (CSA) A similar organization in Canada. Also serves as a competitive alternative for U.S. products. CCOE Chief Controller of Explosives CEBEC Testing laboratory, inspection, and certification company, based in Brussels, Belgium. D…
See also
• ANSI
• CE marking
• Conformance mark
• Consumer Reports
• Consumers Union
External links
• Official website
• List of US NRTLs at OSHA