What is UL 668 ?

Title: Unlocking the Benefits of UL 668 and UL 664: A Comprehensive Guide

The safety and reliability of commercial equipment are of utmost importance in the industry. two key technical standards, UL 668 and UL 664, play a significant role in ensuring the safety of various products. In this article, we will discuss the purpose of these standards, their key requirements, and their significance in the industry.

Underwriters Laboratories (UL) is a global safety certification organization that establishes safety standards for a wide range of products. Two of UL's key technical standards are UL 668 and UL 66These standards are essential for ensuring the safety and reliability of various commercial equipment.

What is UL 668?

UL 668 is a technical standard that defines the safety requirements for commercial refrigeration equipment. It sets guidelines and tests for various aspects of refrigeration systems to ensure their safety, efficiency, and reliability. The purpose of UL 668 is to establish safety standards for commercial refrigeration products, including walk-in coolers, freezers, and refrigerated display cases.

Key Requirements of UL 668

UL 668 addresses potential hazards such as electrical shock, fire, and mechanical failures. The standard outlines several key requirements, including:

Electrical Safety: The standard specifies the maximum voltage and current ratings for electrical components, as well as the use of fuses or circuit breakers to protect against electrical hazards.

Fire Safety: The standard sets guidelines for fire prevention and suppression systems, including the use of fire alarms and fire extinguishers.

3.Mechanical Safety: The standard outlines the acceptable limits for the mechanical movement of equipment, such as the maximum speed and load capacity.

Refrigerant Leakage: The standard restricts the amount of refrigerant that can leak from the equipment, which is essential for maintaining a safe working environment.

Sanitation: The standard requires commercial refrigeration equipment to be properly cleaned and maintained to prevent the growth of bacteria or other harmful microorganisms.

What is UL 664?

UL 664 is a technical standard established by Underwriters Laboratories (UL) to ensure the safety and reliability of safety switches. These switches are used in various industries and applications to control power supply and protect against electrical hazards.

The primary purpose of UL 664 is to prevent potential risks associated with electrical malfunctions or failures. The standard outlines several key requirements, including:

Electrical Safety: The standard specifies the maximum voltage and current ratings for electrical components, as well as the use of fuses or circuit breakers to protect against electrical hazards.

Contact Point: The standard specifies the location of the contact point for the device, which is critical for ensuring proper electrical connections.

Ground: The standard specifies the grounding requirements for electrical components, which is essential for preventing electrical hazards.

Surge Protection: The standard outlines the acceptable limits for the voltage and current surges that can be withstand by the device, which is critical for preventing damage to the device.

Conclusion

UL 668 and UL 664 are two essential technical standards that play a significant role in ensuring the safety and reliability of various commercial equipment. By defining specific requirements for safety switches and commercial refrigeration equipment, these standards help prevent potential risks associated with electrical malfunctions or failures. Compliance with these standards is necessary for manufacturers to obtain UL certification for their products, indicating that their products meet stringent safety standards.