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What is UL 60335-2-97?

UL 60335-2-97, also known as the Standard for Safety of Household and Similar Electrical Appliances – Particular requirements for drives, is an important safety standard that governs the manufacturing and testing of various household electrical appliances. This standard, established by Underwriters Laboratories (UL), defines the specific safety requirements that these appliances must meet in order to be considered safe for consumer use.

The Scope of UL 60335-2-97

UL 60335-2-97 applies to a wide range of electrical appliances commonly used in households, such as washing machines, dishwashers, refrigerators, and vacuum cleaners. It covers both fully electric appliances and those powered by other energy sources, such as gas or oil. The standard outlines various safety aspects, including mechanical hazards, electrical hazards, and fire hazards, ensuring that manufacturers design and produce appliances that are free from potential risks to consumers.

Key Requirements of UL 60335-2-97

The standard mandates several important safety requirements. For example, it specifies that appliance motors should be protected against overheating by incorporating thermal protection devices. This helps prevent motor burnout and reduces the risk of fire due to motor failures. Additionally, the standard requires adequate insulation and grounding to minimize the chances of electrical shock or short circuits.

Another crucial aspect addressed by UL 60335-2-97 is the prevention of contact with moving parts. Appliances like washing machines and food processors often contain rotating or reciprocating components that can pose a danger if not properly shielded. Manufacturers must ensure that these parts are adequately guarded to prevent accidental contact, thus reducing the risk of injury to users.

Compliance and Certification

Manufacturers must comply with UL 60335-2-97 in order to have their appliances certified as safe for use. Compliance is typically achieved by conducting thorough testing and evaluation of the appliances. This can involve various assessments, including temperature rise tests, leakage current tests, and stability tests. Once an appliance successfully meets all the relevant requirements, it receives a UL certification mark, indicating its compliance with the UL safety standards.

Consumers are advised to look for the UL certification mark when purchasing household electrical appliances, as it provides assurance that the product has undergone rigorous testing and meets high safety standards. By adhering to UL 60335-2-97, manufacturers play a vital role in ensuring the safety and well-being of consumers worldwide.


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