What is the relationship between the RU certification and UL certification of the PC power supply, a

You should be talking about the CRUUS mark or the RUCRU mark in UL certification.

Cruus logo.

Used for Canadian and U.S. approved part markings.

This is a new UL Recognized Part Mark that went into effect on April 1, 1998. It can be used for parts certified by UL in accordance with both Canadian and U.S. requirements. Originally, UL did not intend to introduce a combined approved parts marking, but rather introduced the new mark because UL certified users whose products were sold both in Canada and the United States liked the Canadian and U.S. listings and grading marks.

rucru logo.

Approved Part Marking and Canadian Recognized Part Marking.

These marks are rarely seen by the average consumer because they are used on parts, which are parts of larger products or systems. These parts do not directly constitute a complete product on their own, or their use is limited. Component approval marks can be found in a wide range of products, including some switches, power supplies, printed power strips, certain types of industrial control equipment, and thousands of other products.

Products intended for sale on the Canadian market are marked with an approved part with a letter "C".

UL certification like RU is only done for products with parts, which must be assembled by professionals and cannot be purchased directly in the supermarket.

UL+ UL certification for a circle is made of finished products, such as electric fans, hair dryers and other products that direct consumers can buy and use;

If you need to do UL certification, you can contact: Ningbo Lan Xiaohua

I haven't really heard of this yet! There is really no need to pursue what certification just feels! It has nothing to do with quality! It's all a lie! Or listen to other people's experience of using it!

UL is a mandatory certification in the United States, and RU has never heard of it. It's all about the same as 3C.

UL recognized.

The full name is Underwriter Laboratories Inc(Underwriters Laboratory). The UL Safety Laboratory is the most authoritative and largest private organization engaged in safety testing and identification in the United States.

It uses scientific testing methods to study and determine whether and how harmful various materials, devices, products, equipment, buildings, etc. are harmful to life and property; Determine, compile, and disseminate appropriate standards and materials that contribute to the reduction and prevention of damage to life and property, and conduct fact-finding operations. In addition to the requirements for product quality certification, UL certification also has certain requirements for the production system of products. There are many marks for UL certification depending on the scope of application and the region of application, and the above picture is a mark for Canada and the United States.

Generally speaking, UL certified products will have a serial number under the UL mark, and users can verify it through the serial number in the official ** of UL certification.

RoHS certified.

It is a mandatory standard formulated by EU legislation, and its full name is the Restriction of Hazardous Substances Directive on the Use of Certain Hazardous Substances in Electrical and Electronic Equipment. The standard was officially implemented on July 1, 2006, and is mainly used to standardize the material and process standards of electronic and electrical products, so as to make it more conducive to human health and environmental protection. The purpose of this standard is to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers in electrical and electronic products, a total of 6 substances, and focuses on the content of lead that cannot be exceeded.