UL certification

UL is the abbreviation of Underwriter Laboratories Inc. UL Safety Testing Institute is the most authoritative in the United States and the largest private institution engaged in safety testing and identification in the world. It is an independent, for-profit, professional organization that conducts experiments on public safety. It uses scientific testing methods to study and determine whether various materials, devices, products, equipment, buildings, etc. are harmful to life and property and the degree of harm; it determines, writes, and issues corresponding standards and helps reduce and prevent hazards to life. We will collect information on property damage and conduct fact-finding research at the same time. UL certification is a non-compulsory certification in the United States. It mainly tests and certifies product safety performance. Its certification scope does not include the EMC (electromagnetic compatibility) characteristics of the product.

In short, it is mainly engaged in product safety certification and business safety certification business. Its ultimate goal is to obtain products with a considerable safety level for the market and contribute to ensuring the safety of personal health and property. As far as product safety certification is an effective means of eliminating technical barriers to international trade, UL also plays an active role in promoting the development of international trade.

Mark meaning

UL listed mark

This is the most commonly used UL mark. If this mark is affixed to a product, it means that the sample of the product meets UL's safety requirements. These requirements are primarily UL's own published safety standards. This type of marking is commonly seen on products in the following categories: electrical appliances, computing equipment, stoves and heaters, fuses, power strips, smoke and carbon monoxide detectors, fire extinguishers and sprinkler systems, personal flotation devices such as Life jackets and buoys, bulletproof glass and thousands of other products.

C-UL Listed Mark

This mark applies to products sold on the Canadian market. Products bearing this mark are evaluated against Canadian safety requirements. Canadian safety requirements may differ from those in the United States. This marking can be seen on the following types of equipment: electrical and computing equipment, vending machines, home burglar alarm systems, lighting fixtures, and many other types of products.

C-UL US listing mark

UL introduced this new listing mark in early 1998. It means it meets both U.S. and Canadian requirements. Canadian/US markings are optional. UL encourages manufacturers whose products are certified in both the United States and Canada to use this new combination mark, but manufacturers can choose to continue to use the UL mark only for the United States or Canada.

Grading mark

This mark appears on products that have been evaluated by UL. UL has evaluated products bearing this mark on certain specific attributes. Some of the special attributes here refer to being suitable for use in a limited hazard range or under limited or special conditions. Typically, products classified by UL are general building materials and industrial equipment. For example, types of equipment classified by UL are diving suits, fire doors, firefighter protection gear, and industrial trucks.

C-UL classification mark

This classification mark applies to products sold in the Canadian market. It means that UL has evaluated the product in accordance with Canadian standards for certain hazardous situations or characteristics. For example, C-UL rated products include air filters, fire stops, certain types of roofing systems, etc.

Approved Parts Marks and Canadian Approved Parts Marks

The average consumer rarely sees these marks because they are used on parts, which are some of the larger Parts of products or systems. These parts by themselves do not directly constitute a complete product, or their use is limited. Part approval marks can be found on a wide range of products, including some switches, power supplies, printed wiring boards, certain types of industrial control equipment, and thousands of other products. Products intended for sale in Canada bear the Approved Parts mark with a "C" letter.

Recognized Parts Mark for Canada and the United States

This is a new UL Recognized Parts Mark that became effective on April 1, 1998. It can be used on parts certified by UL to both Canadian and US requirements. Originally, UL did not intend to introduce a combined approved component mark, but because UL certificate users whose products were sold to both Canada and the United States liked the Canadian/US list and classification mark, this new mark was introduced.

International "EMC-mark"

Products bearing this international "EMC-mark" meet the requirements of Europe, the United States, Japan, Australia, or any combination of the above countries and regions. Electromagnetic compatibility requirements. In the United States, certain types of products cannot be sold unless they are proven to meet U.S. electromagnetic compatibility requirements. Products requiring EMC testing include medical and dental equipment, calculators, microwave ovens, televisions, radios, transmitters, and wireless control equipment.

EPH Product Mark

This UL mark appears on products that have been evaluated in accordance with Environmental and Public Health Standards. The "graded version" of this mark is used for products that comply with both ANSI/NSF standards and other food hygiene scopes and requirements. Products that fall into this category include: food service equipment, meat and poultry plant equipment, and drinking water additives. The "listed" version of this mark is generally used for products that comply with UL's own EPH safety standards.

Blue hygiene mark

It is optional and supplements the graded mark.

Field Evaluation Product Mark

The Field Evaluation Product Mark applies to products that UL has thoroughly evaluated in the field of use rather than in UL or the manufacturer's laboratory. . If a product has been substantially modified since manufacturing, or if there is no third-party marking on the product, the building owner, regulatory authority, or anyone else directly involved with the product can request that UL come to the site to inspect the specific product. To test. Products that meet relevant safety requirements can be labeled with this on-site evaluation product mark that is not easy to fall off.

Management system registration mark

This UL registered company mark cannot be seen on the product. What it means is: a facility has passed UL's assessment in accordance with management system standards. By having UL evaluate its management system procedures, it can be used to enhance the company's image and become an integral part of the company's marketing strategy. The standards used by UL in this regard are: ISO9000 series quality assurance standards; QS-9000 and TE supplementary standards, which are the quality standards set by the three major U.S. automakers for their suppliers; ISO14001, which covers environmental management systems Standards; AS9000, aerospace quality management system; TL9000, telecommunications quality management system; SA8000 of social responsibility management system.

Marine mark

UL marine mark appears on those products used in navigation. Products bearing this mark have been evaluated against marine safety standards published by UL and other applicable standards and specifications. Damage that can occur on a pleasure boat or yacht when the product is exposed to certain harsh shipping environments, such as vibration, shock, ignition protection, water intrusion and corrosion caused by salt water. The requirements of the marine safety standards published by UL and other applicable standards and specifications mentioned above are aimed at these damages. Types of equipment suitable for UL marine marking include alternators, batteries/chargers/energy converters, navigation lights, fuel tanks, filters and pumps.