Source : Yk Testing Time：2022-11-24 View:
UL certification is an abbreviation for Underwriter's Laboratories Certification. It is the most authoritative private institution in the United States and the largest private institution engaged in safety testing and appraisal in the world. It is an independent, for-profit professional institution that conducts tests for 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 extent of harm;
Determine, prepare and issue corresponding standards and materials that can help reduce and prevent loss of life and property, and conduct fact finding business.
UL certification is a non mandatory certification in the United States, mainly for testing and certification of product safety performance, and its certification scope does not include EMC (electromagnetic compatibility) characteristics of products.
UL was founded in 1894 and became a self-supporting certification body in 1916. At the beginning, UL was funded by the government fire insurance department. After a century of development, UL is now a world-renowned certification agency. It has a set of strict organization and management system. Standard development and product certification procedures. The certification marks are mainly divided into 13 categories.
Meaning of UL certification mark:
1. UL listing mark: This is a common mark in UL certification. Most products will obtain such marks when applying for UL certification. If such mark is added to the product, it indicates that the product complies with UL standard.
2. C-UL mark: Most products are exported to Canada, and the products must be evaluated according to Canada's safety requirements. (Note: Canada's product safety requirements are different from those of the United States, and another safety certification is required for products exported to Canada.
3. C-ULUS marks: These marks were introduced in early 1998, representing that the products meet the common requirements of the United States and Canada for products to be selected in the United States and Canada.
4. Grading mark: This mark only appears on the products evaluated by UL, and UL will grade the products according to the specific conditions and hazard range of the products.
5. C-UL mark: This is similar to the classification mark. It is a product sold in the Canadian market.
6. Approved part mark: ordinary consumers rarely see this certification mark, which is mainly used for parts. These components will form larger product or system components. Parts sold in Canada are marked with a letter C, i.e. UL quarterly part certification mark.
7. Marking of parts in the United States and Canada: This is a new UL identification part marking, which came into effect on April 1, 1998. It can be used to collect evidence according to the requirements of Canada and the United States.
8. EMC mark: if the product has ULEMC certification mark, it means that the product meets the requirements of the European Union, the United States, Japan, Australia and other countries on electromagnetic compatibility.
9. EPH mark: The EPH mark represents that the product has been evaluated according to the Environmental and Public Health Standards and meets other food hygiene scope and requirements.
10. Blue health mark: it is a supplement to the grading mark and can be selected.
11. On site evaluation sign: It is a sign used to evaluate manufacturers on the site or not in the UL laboratory at UL, commonly known as factory inspection.
12. Management system registration mark: The UL registered company mark cannot be seen on the product. Its significance is that the facility has passed UL's assessment according to the management system standards. By allowing UL to evaluate its management system procedures, it can be used to improve the company's image and become part of the company's marketing strategy.
13. Marine mark: As the name implies, UL marine mark is a mark used for marine products. This mark represents its safety standards and specifications.
The federal, state, county and municipal governments of the United States have 40000 administrative districts, each of which recognizes UL certification.
UL certification is voluntary certification in the mode of "type test+first factory inspection+supervision and inspection after certification".
Common types of UL certification
1) UL column name;
2) UL classification;
3) UL approved.
Phase 1: Project confirmation: confirm the UL standard, certification cost and time, sample quantity, etc;
Stage 2: Data preparation: according to the certification requirements, the enterprise prepares all documents required for certification;
Stage 3: Sample sending test: the enterprise sends the prepared samples to HX-TECOVO laboratory for product testing;
Stage 4: Issuing the report: the product test results meet the requirements of the certification standards, and the test report is officially issued;
Stage 5: Factory audit: for enterprises applying for UL certification for the first time, arrange for the first factory inspection;
Stage 6: Sign use: After the review meets the requirements, the applicant formally obtains UL certification mark;
Stage 7: Annual audit and certification: enterprises with UL authorization and certification mark need to cooperate in completing the factory audit four times a year.
UL is mainly responsible for the inspection of electrical, electronic equipment, mechanical products, lamps, building materials, fire protection equipment, chemicals and other public safety aspects. UL certified products include the following categories:
1) Audio visual equipment
2) Automobile
3) Electronic components
4) Household appliances
5) Industrial control equipment
6) Information technology equipment
7) Luminaires
8) Medical devices
9) Plastic
10) Information equipment
11) Wire and cable
The applicant submits relevant company and product information
Written application: UL shall be required to test your products in writing.
Company information: provide the detailed and accurate name, address, contact person, postal code, telephone and fax of the following units in both Chinese and English.
(a) Application company: the company that applies for product testing and is responsible for all engineering service costs
(b) Listed companies: companies listed in various product catalogs published by UL
(c) Production factory: the manufacturer and producer of products.
Product data: The product data shall be provided in English.
(a) Product name: provide the full name of the product.
(b) Product model: list in detail the model, variety or classification number of all products to be tested.
(c) The intended use of the product: for example, home, office, factory, coal mine, ship, etc.
(d) Parts list: list the components, models (classification numbers), ratings, and names of manufacturers of the products in detail. For insulation materials, please provide the name of raw materials. When the parts have been UL certified or approved, please prove the specific model of the parts and indicate their UL file number
(e) Electrical performance: for electronic and electrical products. Provide electrical schematic diagram (circuit diagram) and electrical performance table.
(f) Structure diagram: for most products, it is required to provide the structure diagram or explosion diagram of the product, and the ingredient list.
(g) Photos, instructions for use, safety and other items or installation instructions of the product.
Jiangsu Yueke Testing is a third-party UL certification agency authorized by UL, which can handle UL certification, UL predictive testing and UL commissioned testing services for products in the fields of connectors, electronic components, electrical accessories, new energy components, etc.
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