请注意:此版本的所有临时修订版将在您购买时提供。刀开关SUL 3631示波器1。1这些要求包括根据国家电气规范ANSI/NFPA-70.1.2使用的开放式闸刀开关。这些要求包括带或不带保险丝座的开关；具有单独底座的开关，用于前后接线连接；以及无底座的开关部件，用于安装在配电盘和配电盘上。开关可以是单极或多极开关，带或不带快速断开或辅助触点，除非特别需要此类触点。

Please note: All interim revisions for this edition available at time of your purchase will be included.Knife SwitchesUL 3631 Scope1.1 These requirements cover open knife switches for use in accordance with the National Electrical Code, ANSI/NFPA-70.1.2 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.