Formerly known as Underwriters Laboratories (UL), this was a non-profit organization but now it has transformed into UL LLC, a for-profit internationally accepted safety organization located in the United States and is one of the biggest & oldest testing laboratories.
Established by William Henry Merrill in 1894, UL has been in practice for about 125 years. It tests products, design safety standards and certifies manufacturers. The products are then known as UL products and are sold around the world. UL products include electronic products, security equipment, lasers, alarms, robotics, medical devices, etc.
With the aim of making the world a safer place, Underwriters Laboratories along with setting standards for new products certifies the products as well. UL certification removes risk and provides confidence among the buyers. In order to get UL certification or say the mark, the products must fulfill a wide range of principles. Products are considered to be UL certified if they are marked with the following seal.
UL certification is important because of the following reasons:
Standards: UL requires the product to meet a high level of standards before they are allowed any certification.
Obligation: UL certification represents the manufacturer's obligation about safety.
Confirmation: UL members visit manufacturers multiple times so as to confirm that only those products are certified which fulfill UL's requirements.
UL listed and UL approved are two different terms and basic differences between them are as follows:
Underwriters Laboratories is a highly recognized standards developer in the United States. UL sets standards using wide research, technical skills and severe emphasis on quality. It addresses areas of electrical and electronic products, sustainability, life safety, building products, industrial control equipment, plastic material, wire, and cable, photovoltaic, etc. to develop new standards or to review prevailing standards.
Within the experience of more than a century, UL has developed more than 1500 standards. Applying these standards empowers us to:
UL standards for electrical and electronic products include not only electrical safety requirements but also fire or other mechanical hazard assessments. UL holds a very strong relationship with the electrical and electronic industry nowadays. Some of the UL standards for the various electrical system and electronic products are as follows:
|UL-50||Enclosures for electrical equipment|
|UL-153 ||Portable electrical lamps |
|UL-197 ||Electrical cooking appliances|
|UL-796 ||Printed wiring boards|
|UL-1492 ||Audio/Video products |
|UL-1598 ||Luminaires |
|UL-1642 ||Lithium batteries|
|UL-1995 ||Cooling/Heating products|
|UL-2267 ||Fuel cell system in electric trucks|
|UL-60335 ||Household and other similar electrical appliances|
UL listed products should be bought because of the following factors:
In short, we can enjoy the benefits of certification of the highly recognized organization if we buy UL listed products.
We can get UL listed products easily as UL has spread all over the world and most of the manufacturers are affiliated with UL. So, by making use of UL listed or say standardized products we can make this world a better and safe place.
About The Author
Abdur Rehman is a professional electrical engineer with more than eight years of experience working with equipment from 208V to 115kV in both the Utility and Industrial & Commercial space. He has a particular focus on Power Systems Protection & Engineering Studies.