UL 61058-2-142:2020 is a technical standard that specifies requirements and testing methods for switches for appliances. It is part of the UL 61058 series of standards, which covers different types of switches used in various applications.
of UL 61058-2-142:2020
UL 61058-2-142:2020 specifically focuses on switches for appliances that are intended to be operated by hand. The standard ensures that these switches meet certain safety and performance requirements. It covers aspects such as electrical ratings, construction, marking, mechanical strength, and insulation properties.
Key Requirements of UL 61058-2-142:2020
UL 61058-2-142:2020 defines several key requirements for switches used in appliances. These include:
Contact arrangement: The standard specifies the permissible contact arrangements and their respective ratings.
Dielectric strength: Switches must demonstrate sufficient dielectric strength to withstand the specified voltage levels.
Insulation resistance: The standard sets minimum insulation resistance values to ensure electrical safety.
Mechanical endurance: Switches are tested for their durability and ability to withstand repeated operation.
Clearances and creepage distances: The standard defines minimum clearances and creepage distances between live parts and accessible parts to prevent electric shock hazards.
Protection against solid objects and liquids: Switches are evaluated for their resistance to ingress of foreign objects and liquids.
Testing Methods in UL 61058-2-142:2020
To determine compliance with the standard, various testing methods are employed. These tests include:
Electrical endurance: Switches undergo a large number of cycles to ensure their reliability over time.
Dielectric voltage withstand: Switches are subjected to high voltages to verify their electrical insulation properties.
Mechanical strength: The mechanical strength of switches is tested by applying forces or torques to assess their robustness.
Environmental testing: Switches may be exposed to different environmental conditions (e.g., temperature, humidity) to evaluate their performance.
In Conclusion
UL 61058-2-142:2020 is an important technical standard that sets out the requirements and testing procedures for switches used in appliances. It ensures that these switches meet safety and performance criteria, protecting users from potential hazards. Compliance with this standard helps manufacturers demonstrate the quality and reliability of their products.
Nina She