UL Standard for Safety Knife Switches
|Publication Date:||12 August 2011|
These requirements cover open knife switches for use in accordance with the National Electrical Code, ANSI/NFPA-70.
These requirements cover switches with or without fuseholders; switches having individual bases intended for either front or rear wiring connection; and switch parts without bases intended for mounting on switchboards and panelboards. Switches may be single- or multi-pole and with or without quick-break or auxiliary contacts, except where such contacts are specifically required.