American UL certification,UL Testing & Certification
Introduction of American UL Certification
UL is short for Underwriter Laboratories Inc. The UL Safety Test Institute is the most authoritative in the United States, and it is also a large non-governmental organization engaged in safety testing and identification in the world. It is an independent, non-profit, professional agency that conducts tests for public safety. Unlike the FCC certification, UL certification is a safety certification. UL is mainly engaged in product safety certification and operating safety certification business. Its ultimate purpose is to obtain products with a fairly safe level for the market, and to contribute to ensuring human health and property safety . In the United States, UL is a symbol of the safety mark for consumers. Globally, UL is one of the most trusted manufacturers of conformity assessment providers.
Certification category
The types of UL's product certification and testing services can be divided into listing, recognition and classification.
1. LISTED:
Generally speaking, the listing is only applicable to complete products and various devices and devices that are replaced or installed by qualified personnel on site. Various products that belong to the UL listing service include: household appliances, medical equipment, computers, commercial equipment And all kinds of electrical products in the building, such as power distribution systems, fuses, wires, switches and other electrical components. UL listed products can usually be marked with the UL listed mark on each product. The use of column name flags.
2. Recognized:
Recognition service is an item in UL service, and the products it approves can only be used as components and raw materials on UL listing, classification or other recognized products. Approved products are incomplete in structure or have certain restrictions in use to ensure that the expected safety performance is achieved. In most cases, tracking services for approved products fall into category R. Approved products that fall into category L include electronic wires (AVLV2), processed wires (ZKLU2), wire harnesses (ZPFW2), aluminum wires (DVVR2), and metal flexible tubes (DXUZ2). Approved products require an approval mark.
3. Classification:
The grading service only evaluates specific hazards of products, or evaluates products that implement standards other than UL standards (including internationally recognized standards such as IEC and ISO standards). Generally speaking, most graded products are not products for consumer use, but products for industrial or commercial use. The grading mark in the UL mark indicates that the product has certain restrictions and specified scope when UL is identified. For example, chemicals such as solvents used in industry are evaluated only in the range of fires that may occur when they reach the ignition temperature. The grading and listing services of some products are the same, but generally only evaluate one or more aspects of the product. For example, in the United States, equipment such as medical X-ray diagnostic instruments must comply with U.S. laws and relevant radiation emissions and The accuracy of the flow is specified, but because UL only uses X-rays as a graded product, it only evaluates its mechanical properties, electrical properties, and other non-radiating properties.
Applicable product range
Electronic, electrical, mechanical or electromechanical products
Any electronic, electrical, mechanical or electromechanical product with the UL mark indicates that this product has reached the minimum requirements of generally recognized US and Canadian product safety standards. It is tested to meet the relevant product safety standards and also represents the production plant. Agree to receive strict regular inspections to ensure consistent product quality and can be sold to the US and Canadian markets.