UL 20 General-Use Snap Switches

standard by Underwriters Laboratories, 01/01/2000

Full Description

The requirements of this Standard apply to manually operated, general-use snap switches for connection to copper (Cu) or copper-clad conductors used inaccordance with the National Electrical Code(NEC), ANSI/NFPA 70, or the Canadian Electrical Code (CEC), Part 1, and intended for connection to wiringsystems recognized by the NEC or the CEC, Part 1. In Canada, requirements for switches for connection to aluminum (Al) conductors used in accordance with theCEC, Part 1, and intended for connection to wiring systems recognized by the CEC, Part 1, are covered in Appendix B.

This Standard applies to ac/dc rated switches for which the load ratings do not exceed 60 A at 250 V or less, 30 A at 251 V - 600 V, and 2 hp at 125 V - 600V or less. This Standard also covers ac-only rated switches for which the load ratings do not exceed 30 A at 347 Vac or less.

This Standard applies to switches constructed to be installed readily in a flush device box or on an outlet-box cover and intended for connection to branch-circuitwiring.

This Standard applies to pendant and through-cord switches intended for field installation on flexible cord and provided with one "on" and one "off" position.

This Standard applies to switches intended for surface mounting and provided with a separable base and cover for connection to exposed wiring consisting ofnonmetallic sheathed cable or open wiring on insulators (knob and tube).

This Standard applies to self-contained switches intended for flush mounting without a separate outlet box and for connection to branch-circuit wiring consistingof one or more non-metallic sheathed cables containing copper conductors.

This Standard applies to ac/dc fixture switches intended to be installed in fixtures to control incandescent lighting or fans for connection to branch-circuit wiring.

Product Details

Edition: 12th Published: 01/01/2000