UV lamp systems that emit ultraviolet radiation at wavelengths less than 250 nm shall comply with the ozone requirements specified in Section 48. The appliance shall be provided with a visual …

Aug 26, 2024 · You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Some copyright holders …

Jun 15, 2023 · UL provides this Standard "as is" without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or fitness for any …

UL 979 – Water Treatment Appliances Please note: All interim revisions for this edition available at time of your purchase will be included. These requirements cover electrically operated water …

These appliances are intended for installation and use in accordance with the National Electrical Code, NFPA 70, and are rated 600 V or less.

Jan 23, 2025 · UL 979 | UL Standards & Engagement | UL Standard | Edition 4 | Water Treatment Appliances | Published Date: January 23, 2025 | ANSI Approved: June 26, 2025

This new Fourth Edition of ANSI/UL 979 dated January 23, 2025 is being issued to reflect the ANSI approval of the standard. There are no additions or changes to requirements at this time.