What is UL 47 ?

Title: What is UL 479 and UL 473? A Technical Overview

Introduction:

UL (Underwriters Laboratories) is a global safety science organization that provides testing, certification, and inspection services. The two key technical standards that are relevant to this article are UL 479 and UL 473. These standards serve different purposes, but both are essential for ensuring the safety and reliability of electrical and electronic equipment. In this article, we will discuss the purpose of UL 479 and UL 473, their key requirements, and their significance in ensuring safety.

UL 479: The Ultimate Safety Standard for Electrical and Electronic Equipment

UL 479 is a technical standard that sets out the requirements for safety, performance, and reliability of electrical and electronic equipment. This standard covers various aspects such as construction, temperature ratings, current-carrying capacities, and durability. The primary purpose of UL 479 is to ensure that electrical and electronic equipment meet specific safety requirements, which helps prevent hazards like electric shock, fire, or other potential risks associated with faulty equipment.

Key Requirements of UL 479:

To comply with the requirements outlined in UL 479, manufacturers must take several steps. They must design and produce equipment that is safe, efficient, and reliable. They must also perform thorough testing to verify that their products meet the necessary safety standards.

UL 473: The Safety Standard for Electrical Devices in Hazardous Environments

UL 473 is a widely recognized technical standard that sets requirements for the construction and performance of electrical devices. This standard is particularly relevant for industries that use electrical equipment in potentially explosive atmospheres, such as oil and gas, chemical processing, and mining.

The primary purpose of UL 473 is to address the specific safety concerns associated with electrical devices used in these hazardous environments. By adhering to the requirements outlined in UL 473, manufacturers can design and produce electrical equipment that can safely operate in these environments without causing ignition or explosion risks.

Conclusion:

UL 479 and UL 473 are two crucial technical standards that ensure the safety and reliability of electrical and electronic equipment. Compliance with these standards is essential for protecting workers, facilities, and investments from potential accidents and ensuring compliance with relevant safety regulations. As manufacturers, it is vital to understand the requirements of these standards and take the necessary steps to ensure that their products meet the necessary safety standards.