Preface 

This is the harmonized CSA Group and UL standard for Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices. It is the second edition of CSA C22.2 No. 60947-5-1 and the fourth edition of UL 60947-5-1. This edition of CSA C22.2 No. 60947-5-1 supersedes the previous edition published in 2014 as CAN/CSA-C22.2 No. 60947-5-1 (adopted IEC 60947-5-1:2003). This harmonized standard is based on IEC Publication 60947-5-1: fourth edition, Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and switching elements - Electromechanical control circuit devices, issued May 2016. IEC 60947-5-1 is copyrighted by the IEC. This harmonized standard was prepared by CSA Group and Underwriters Laboratories Inc. (UL). 

The efforts and support of the Technical Harmonization Committee for Industrial Control Equipment, of the Council on the Harmonization of Electrotechnical Standards of the Nations of the Americas (CANENA), are gratefully acknowledged. This standard is considered suitable for use for conformity assessment within the stated scope of the standard. This standard was reviewed by the CSA Integrated Committee on Industrial Control, under the jurisdiction of the CSA Technical Committee on Industrial Products and the CSA Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the CSA Technical Committee. This standard has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. 

Scope and object 

This part of IEC 60947 applies to control circuit devices and switching elements intended for controlling, signalling, interlocking, etc., of switchgear and controlgear. It applies to control circuit devices having a rated voltage not exceeding 1 000 V a.c. (at a frequency not exceeding 1 000 Hz) or 600 V d.c. However, for operational voltages below 100 V a.c. or d.c., see 4.3.2.2. This standard applies to specific types of control circuit devices such as: 

- manual control switches, for example push-buttons, rotary switches, foot switches, etc.; 

- electromagnetically operated control switches, either time-delayed or instantaneous, for example contactor relays; 

- pilot switches, for example pressure switches, temperature sensitive switches (thermostats), programmers, etc.; 

- position switches, for example control switches operated by part of a machine or mechanism; 

- associated control circuit equipment, for example indicator lights, etc. 

NOTE 1 A control circuit device includes (a) control switch(es) and associated devices such as (an) indicator light(s). 

NOTE 2 A control switch includes (a) switching element(s) and an actuating system. 

NOTE 3 A switching element can be a contact element or a semiconductor element. It also applies to specific types of switching elements associated with other devices (whose main circuits are covered by other standards) such as: 

- auxiliary contacts of a switching device (e.g. contactor, circuit breaker. etc.) which are not dedicated exclusively for use with the coil of that device; 

- interlocking contacts of enclosure doors; 

- control circuit contacts of rotary switches; 

- control circuit contacts of overload relays. 

Contactor relays also comply with the requirements and tests of IEC 60947-4-1 except for the utilization category which comply with this standard. This standard does not include the relays covered in IEC 60255 or in the IEC 61810 series, nor automatic electrical control devices for household and similar purposes. The colour requirements of indicator lights, push-buttons, etc., are found in IEC 60073 and also in CIE S 0004/E-2001 from the Commission of Illumination (CIE). The object of this standard is to state: a) the characteristics of control circuit devices; b) the electrical and mechanical requirements with respect to: 1) the various duties to be performed; 2) the significance of the rated characteristics and of the markings; 3) the tests to verify the rated characteristics; c) the functional requirements to be satisfied by the control circuit devices with respect to: 1) environmental conditions, including those of enclosed equipment; 2) dielectric properties; 3) terminals. 1.1DV D2 Modification of 1.1 by adding the following: This equipment is intended for installation in accordance with CSA C22.1, Canadian Electrical Code (CE Code, Part I), and the US National Electrical Code (NEC), NFPA 70.