For products that have passed the relevant safety standards and have been evaluated for all foreseeable safety-related hazards, including fire, electric shock and mechanical hazards, the UL listed identification "ULListed" can be used ". Because UL Listed Identification (ULListed) vs. UL Approved Identification (ULRecognized) there are more constraints and it is more difficult to obtain. "ULListed" is often seen on products that are installed in harsh environments. The UL approved mark (ULRecognized) in UL certification is usually used for those components that meet the application standard.
In some cases, specially designed components may be incomplete or limited in performance. These components may be suitable for installation on other equipment at the factory end. These components may be referred to as "approved". On these devices, the manufacturer is aware of the restrictions on the use of these components.
UL is mainly engaged in product safety certification and operating safety certification business, its ultimate goal is to get a considerable level of safety for the market goods, for 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 an active role in promoting the development of international trade. UL was founded in 1894. In the initial stage, UL mainly relied on the fire insurance department to provide funds to maintain its actions. It was not until 1916 that UL was completely independent. After nearly a hundred years of development, UL has become a world-class certification body, which has a set of strict organization and management system, standard development and product certification procedures. UL is managed by a board of directors composed of safety experts, officials, consumers, education, utilities, insurance and standards departments. The daily work is handled by the president and vice president.
At present, UL has five laboratories in the United States, headquartered in Northbrook Town, north of Chicago, and has set up corresponding laboratories in Taiwan and Hong Kong.
In the United States, for consumers, UL is a symbol of safety marks. Worldwide, UL is one of the trusted conformity assessment providers for manufacturers.
A:Listing-List Name: UL List Name Service is a service in UL Safety Certification. UL Listed Mark on Products Manufacturers require UL to test samples to US recognized safety standards. Under reasonably predictable conditions, the sample will not cause fire, leakage and related hazards.
B :RecognizedComponent- approval: Approved component service test parts or non-finished products to be used for UL listed products. Such as UL approved component services: plastic/wire/circuit board/motor/power supply, etc. UL certification of PCB generally belongs to this category. RUMARK is also our PCB board to see more.
C:Clasification- grading: Graded products have specified properties when testing industrial and commercial products, including flammability, danger or special specifications required. UL graded products are tested according to different properties, specified risk ranges or specific circumstances. Generally for building materials or industrial instruments.
UL certification factory inspection: in addition to quarterly audit and annual audit, UL audit factory four times a year, every year to audit factory.
UL factory inspection prepared information:
production quality control procedures.
Inspection standards for main components and finished products.
Record the main component certificate (yellow card).
Product material list.
Documents for plastic control.
Main documents for production control.
Record the 7UL label.
Main parts packaging BulkLablo recovery.
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