UL 20:14ED 2018-07-20

This revision of ANSI/UL 20 dated January 26, 2021 includes the following changes in requirements: – Manufacturer's Terminal Tightening Torque; 7.1.13 – Correct Typos / Omissions for 277v Motor Ratings for 15 and 20 amp Switches; Table 20 – Marking Location; 7.3.3 – Voltage Markings on AC-ONLY Switches Incorporating Locator or Pilot Indicators; Table 19, Table 20 and 7.2.5 – Ground Screws; 4.12.2 and 7.1.14 – Wiring Diagram for Switches; 2.10, 2.22 and Figure 9 – Editorial corrections; 3.1.1 and 5.18.1

The requirements of this Standard apply to manually operated, general-use snap switches for connection to copper (Cu) or copper-clad conductors used in accordance with the National Electrical Code (NEC), ANSI/NFPA 70, or the Canadian Electrical Code (CE Code), Part I, and and intended to be permanently connected in accordance with the NEC and the CE Code, Part I.