What is UL 917 Ed.4?

UL 917 Ed.4, also known as the Standard for Safety for Plug-In Type Outlet Boxes, is a widely recognized safety standard developed by Underwriters Laboratories (UL), a global leader in product safety testing and certification. This standard specifically applies to plug-in-type outlet boxes, which are commonly used in residential, commercial, and industrial settings to provide electrical power to various devices and equipment.

Background and Purpose of UL 917 Ed.4

UL 917 Ed.4 was first introduced as a response to the need for a comprehensive safety standard for plug-in-type outlet boxes. The previous editions of the standard addressed various safety aspects but lacked clarity and consistency. With advancements in technology and increased awareness of electrical hazards, it became crucial to revise and update the standard to ensure safer and more reliable electrical connections.

Key Requirements and Testing Procedures

UL 917 Ed.4 outlines specific requirements that plug-in type outlet boxes must meet to comply with safety regulations. These requirements include the design and construction of the outlet box, its electrical performance, and protection against potential hazards such as overheating, electric shock, and fire. Manufacturers are required to undergo rigorous testing procedures to evaluate the compliance of their products with the standard.

One of the critical aspects covered by UL 917 Ed.4 is short circuit protection. It mandates that outlet boxes should have built-in mechanisms to prevent excessive current flow in the event of a fault or malfunction. This feature not only protects the connected devices but also prevents potential electrical fires. Testing for short circuit protection involves subjecting the outlet box to high currents and evaluating its response to ensure safe operation under different fault conditions.

Benefits of Complying with UL 917 Ed.4

Complying with UL 917 Ed.4 provides several benefits for both manufacturers and end-users. Firstly, it ensures the safety and reliability of plug-in type outlet boxes, minimizing the risk of electrical accidents and hazards. Products that meet the standard undergo rigorous testing and evaluation, giving consumers confidence in their purchase decisions.

Furthermore, compliance with UL 917 Ed.4 allows manufacturers to demonstrate their commitment to product excellence and safety. It enhances their reputation in the industry and builds trust with customers. Additionally, adherence to this standard may be mandatory for selling products in certain markets, enabling manufacturers to expand their reach and access new opportunities.

Conclusion

UL 917 Ed.4 plays a crucial role in ensuring the safety and reliability of plug-in type outlet boxes. With its comprehensive requirements and rigorous testing procedures, it sets a high bar for manufacturers, fostering a market where only quality products are made available to consumers. By complying with this standard, both manufacturers and end-users can enjoy the benefits of enhanced safety, reliability, and peace of mind.