本标准适用于额定电压为600V或以下的时钟操作开关，设计用于普通位置，以预定间隔闭合或断开负载电路，并按照《加拿大电气规范》第一部分的规则使用。本标准中讨论的时钟操作开关可以是完全封闭的、插入式的或线连接的；b） 外壳或其他结构特征不完整；orc）用于其他设备的性能能力受限。注:“开关”一词在本标准后续条款中未作进一步限定时表示时钟- 操作开关。本标准适用于时钟操作的开关，其中开关触点由时钟装置、齿轮系、手动、电动绕线弹簧电机、电动时钟型电机、电子电路或等效装置驱动。除了关闭和/或打开开关触点外，时钟操作的开关还可以指示一天中的时间或时间间隔。本标准也适用于电视额定时钟操作开关。

This Standard applies to clock-operated switches, rated 600 V or less, designed to be used in ordinary locations to close and open circuits to a load at predetermined intervals, and intended to be employed in accordance with the Rules of the Canadian Electrical Code, Part I. The clock-operated switches discussed in this Standard may bea) completely enclosed, plug-in, or cord-connected;b) incomplete in their enclosure or in other constructional features; orc) restricted in performance capabilities for use in other equipment.Note - The word "switch", when used without further qualification in subsequent Clauses of this Standard, denotes a clock-operated switch.This Standard applies to clock-operated switches in which the switching contacts are actuated by a clock-work, a gear-train, hand, electrically-wound spring motors, electric clock-type motors, electronic circuits, or equivalent arrangements. In addition to closing and/or opening the switching contacts, the clock-operated switches may also indicate the time of day or time interval. This Standard also applies to TV-rated clock-operated switches.