What is the difference between UL 489 and ul98 ?

When it comes to the safety and performance of electrical devices, two common standards that are often referred to are UL 489 and UL 9While both of these standards pertain to the protection of people and equipment from electrical hazards, there are significant differences between them.

UL 489 is a standard designed to ensure the performance of circuit breakers. The standard specifies the design, construction, and testing procedures for circuit breakers, including overcurrent protection, short circuit protection, and thermal protection. The goal of UL 489 is to ensure that circuit breakers are reliable, safe, and perform effectively in various types of electrical installations.

On the other hand, UL 98 is a standard designed to ensure the safety of electrical equipment, including circuit breakers and disconnect switches. The standard specifies the design, construction, and testing procedures for electrical equipment, including protection against electrical hazards, such as overcurrent, short circuit, and thermal protection. The goal of UL 98 is to ensure that electrical equipment is safe, reliable, and performed effectively in various types of installations.

In summary, UL 489 focuses on the performance of circuit breakers, while UL 98 focuses on the safety of electrical equipment. Both standards are important for ensuring the safety and reliability of electrical devices, but they differ in their scope and application. It is important to carefully select the appropriate standard for a specific application to ensure the safety and performance of the electrical device.