scope:

This Standard applies to supplementary protectors,* of the manualreset type with or without a manual operating means, and intended for use as a component within an appliance or other electrical equipment where branch circuit overcurrent protection is already provided (or is not required) in accordance with the Rules of the Canadian Electrical Code, Part I . The acceptability of the component is to be determined in its final application. *The word "protector" only i s used throughout for convenience.

This Standard applies to

(a) overcurrent-trip protectors;

(b) overvoltage-trip protectors;

(c) undervoltage-trip protectors;

(d) relay trip protectors;

(e) shunt trip protectors: and

(f) accessory devices such as alarm and auxiliary switches that may be installed in or on the protector to perform an auxiliary function. 

This Standard applies to single controlling single or polyphase less. and multipole protectors for ac or dc loads, rated 600 V and less.

This Standard applies to protecbors that are not necessarily intended to interrupt the available short-circuit current of the branch circuit in which the appliance or electrical equipment is used. These protectors shall not be used for branch circuit protection.