UL Certification Introduction
UL Certification Introduction
UL is short for Underwriter Laboratories Inc. UL Safety Testing Institute is the most authoritative in the United States, and is also the largest civilian organization engaged in safety testing and identification. It is an independent, non-profit, professional organization that conducts experiments 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 degree of harm; Determine, compile and distribute appropriate standards and information that can help to reduce and prevent loss of life and property, and conduct fact-finding operations. In short, it is mainly engaged in product safety certification and operating safety certification business, its ultimate goal is to get a fairly safe level of goods for the market, for the personal health and property safety to be guaranteed to contribute. In terms of product safety certification as an effective means to eliminate technical barriers to international trade, UL also plays a positive role in promoting the development of international trade.
UL was founded in 1894, the initial stage of UL main in the fire insurance department to provide funds to maintain operations, until 1916, UL was fully independent. After nearly 100 years of development, UL has become a world-renowned certification body, with its own set of strict organizational management system, standard development and product certification procedures. UL is governed by a board of directors consisting of safety experts, government officials, consumer, education, utilities, insurance, and standards representatives, with the President and Vice President handling the day-to-day work. UL currently has five laboratories in the United States, headquartered in Northbrook, north of Chicago, as well as laboratories in Taiwan and Hong Kong.
UL Certification Glossary
AL" LISTING, CLASSIFICATION OR RECOGNITION. Listing, classification or recognition.
A listing or recognition service applied for and authorized by the applicant in the name of a party other than the applicant (listed person).
The AGENT is an agent.
Individuals or enterprises entrusted by the applicant to engage in activities with UL in the name of the applicant.
APPEALS PROCEDURE Appeals procedure & NBSP;
If the customer has a disagreement with the results of the engineering test or follow-up inspection, it can be discussed with the relevant engineer or field representative without fear of jeopardizing the later conclusion. If a satisfactory answer is not received at this level, the customer can appeal to a higher level, up to the President. APPENDIX (Appendix)
Part of the detailed regulations, which include the responsibilities of plant and field representatives and the requirements for relevant testing. Tests performed on samples sent to UL may also be described.
APPLICANT Applicant & NBSP;
Businesses or individuals who request testing of their components, products, or systems from UL. Legally, this party will be responsible for the costs of the testing and tracking services and will have rights to all information related to the results of the testing. See also Agent.
AUTHORIZATION PAGE Authorization Page & NBSP;
File on the first page of the Tracking Service Factory Inspection Instructions to authorize the corresponding tracking inspection service (Class L or Class R) and the permitted certification mark.
CATEGORY CONTROL NUMBER (CCN) Category Control Number (CCN) & NBSP;
UL Specifies the character representation of different product categories in the UL listing, recognition, and classification service. For example, AVLV2 indicates electronic wire; QOWZ stands for portable light fixture. In general, XXXX is a listed product, XXXX2 is an approved product, XXXX7 indicates a listed product that meets Canadian standards, and XXXX8 indicates an approved product that meets Canadian standards.
COMPONENT
A part of a product, in addition to participating in the testing of the entire product as part of the complete product, needs to be tested separately for its performance and/or structure. Parts can be listed, approved, or non-listed parts.
CONDITION OF ACCEPTABILITY Condition of acceptability & NBSP;
These items are listed in the report of approved or non-listed parts, but are not used as a basis for inspection by the field representative. These items, based on the results of the tests, indicate the limitations and conditions for the use of the part and the complete product. For example, in the report of a certain switch, it might be "; Applicable conditions" It is specified that the product is only suitable for currents below 1A or temperatures below 125C.
CONTROL NUMBER (control number)
One of the four possible components of the UL approved mark, as specified by UL. Depending on the product category and the type of tracking service, the control number may change periodically.
FACTORY IDENTIFICATION Factory identification & NBSP;
An identification mark adopted by manufacturers who produce the same product in different factories is used to distinguish the factory in which a product is produced.
FACTORY INSPECTION: Factory inspection
UL Service Item
UL's product certification and testing services can be divided into listing, accreditation and grading.
(1) LISTED: In general, listing is only applicable to complete products and various components and devices that are replaced or installed by qualified personnel on site. The various products that fall under UL's listing service include: Household appliances, medical equipment, computers, commercial equipment, and various electrical products used in buildings, such as power distribution systems, fuses, wires, switches, and other electrical components. Products listed by UL can usually be marked with the UL listing mark on each product. Use of the column name flag.
Recognized: The recognized service is a project in UL services, and the products identified can only be used as components and raw materials on UL listed, graded or other approved products. Approved products are not structurally complete, or have certain limitations in their use to ensure the desired safety performance. In most cases, tracking services for approved products fall under Category R. Approved products belonging to Class L are electronic wire (AVLV2), processed wire (ZKLU2), wire harness (ZPFW2), aluminum wire (DVVR2), and metal flexible tube (DXUZ2). Approved products are required to bear an approved mark.
(3) Classification: The classification service only evaluates products for specific hazards, or for products that comply with standards other than UL standards (including internationally recognized standards such as IEC and ISO standards). In general, most graded products are not products used by consumers, but products used in industry or commerce. The classification mark in the UL mark indicates that the product has certain restrictions and prescribed scope when it is certified by UL. For example, for chemicals such as solvents used in industry, only the range of fires that may occur when they reach the ignition temperature is evaluated. The grading service and listing service of some products are the same, but generally only one or several aspects of the product are evaluated, such as in the United States, medical X-ray diagnostic equipment must comply with the United States laws and regulations on radiation emission and beam accuracy, but because UL only uses X-ray as a grading product. Therefore, only its mechanical properties, electrical properties and other non-radiative properties are evaluated.
(4) Multiple listing, multiple recognition or multiple classification services: When a UL applicant, after obtaining the above listing, accreditation or grading service, wants its products to be manufactured in the name of another company to meet the needs of sales, it may apply for multiple listing, multiple accreditation or multiple grading service, in which case the listed, accredited or graded manufacturer is allowed to use the name of another company in the product list. However, the product must be consistent with the originally listed, approved, or classified product except for the company code, product code, or other features deemed acceptable by UL.
"(5)" AL" Listing, Accreditation, or Grading Service: If a UL applicant does not wish to obtain listing, accreditation, or grading service in the name of his own company, he may apply for listing, accreditation, or grading in the name of another firm (usually a retailer or wholesaler). AL" Listing, accreditation or grading services. It differs from multiple listing, multiple recognition or multiple classification services in that the applicant is not a listed celebrity.
(6) System certification services: As a member of the International Accreditation Committee, UL is widely involved in ISO9000 quality system certification, ISO14000 environmental protection certification, QS9000 automotive industry quality system certification and AS9000 aircraft industry quality system certification services. So far, a total of 116 factories in China have obtained UL system certification; Among them, 21 are ISO9001 certified, 85 are ISO9002 certified, 1 is ISO14001 certified, and 9 are QS9000 certified.
(7) Other services of UL: such as certification services, inspection services, truth judgment services, research services, etc.
