1        Scope

1.1

This Standard applies to products and component devices where the electronics technology handles the operational logic including the safety features. This Standard applies to the following configurations:

a)   safety control function(s) implemented in hardware only; and

b)   safety control function(s) implemented in some combinations of hardware and software.

Note: Clauses that are identified by an asterisk define a simplified path for hardware-only designs. For reference these clauses are listed in Table 2.

1.2

The scope of this Standard includes the sensors and actuators that are associated with the safety control.

1.3

The requirements in this Standard apply to products where failure in either the hardware or software, or any associated devices, can lead to a hazard.

1.4

This Standard prescribes minimum requirements for the documentation necessary to evaluate and confirm that the equipment meets the safety requirements as specified in this Standard.

1.5

This Standard applies to a product identified under a relevant product standard and where the purpose of the product, along with its features and operational role, can be described.

Note: An understanding of the specific end-use environment and any risks associated with the product is essential for this Standard to apply.

1.6

This Standard does not cover general-purpose applications or products where the end-application or the safety requirements for the product are not known or cannot be described, such as for a general-purpose programmable logic controller (PLC).

1.7

In CSA Standards, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

1 Scope

[Add the following paragraph after the dashed list with the first paragraph]

The requirements for artificially ventilated analyzer houses located in zone 2 explosive atmosphere (an area normally requiring EPL Gc) containing an internal source of release of gas vapour or liquid are outlined separately in Annex CC.

[Add the following paragraphs]

The requirements of the IEC 60079 series of Standards cover protection with respect to explosion hazard only. The CAN/CSA-C22.2 No. 60079 series of Standards (based on the adoption of corresponding IEC Standards) is to be used in conjunction with other applicable Standards containing the appropriate electrical safety requirements for general use equipment.

1 Scope

1.1

This Standard applies to photovoltaic (re)combiners rated up to 2000 V dc or 750 V ac, for use on photovoltaic (PV) systems installed in nonhazardous locations in accordance with the Canadian Electrical Code, Part I.

1.2

(Re)combiners for use in photovoltaic systems that are ungrounded, positive grounded, and/or negative grounded are within the scope of this Standard.

1.3

This Standard does not cover panelboards, switchgear assemblies, and switchboards as covered by CSA C22.2 No. 29, CSA C22.2 No. 31, and CSA C22.2 No. 244.

1.4

In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.

1 Scope

[Add the following]

This Standard applies to the safety of such equipment that is designed and constructed for installation

and use in accordance with CSA C22.1, Canadian Electrical Code, Part I.

1 Scope and object

[Replace the third paragraph after Note 3 with the following]

This Standard is applicable to thermal-links with a rated voltage not exceeding 600 V a.c. or d.c. and unlimited current.

This Standard covers the above-noted products that are intended to be installed or used in accordance with CSA C22.1, Canadian Electrical Code, Part I.

1.2 Scope

This standard applies to general, testing, marking, and documentation requirements for impedance heating systems for steel or steel alloy pipe or equipment, rated up to and including 132 Vac. These heating system components are intended for installation in accordance with CSA C22.1, Canadian Electrical Code, Part I (CE Code); NFPA 70, National Electrical Code® (NEC®) in the USA; or with any other national electrical installation code, as applicable.

This standard applies to impedance heating systems that are intended to be installed in ordinary and hazardous locations. The hazardous location installations are limited to 30 Vac and include the following:

In Canada: Zone 2; Zone 22; or Class I, Division 2; Class II, Division 2; Class III, Division 2 as described in CSA C22.1; and

 In the USA: Class I, Zone 2; Zone 22; or Class I, Division 2; Class II, Division 2; Class III, Division 2 as described in the NEC.

This standard also applies to power connection points and control methods used with impedance heating systems.

NOTE 1— Requirements for certification of insulated impedance conductors with insulation temperature ratings above 105 °C may be considered under a special investigation by an accredited certification body.

NOTE 2— Information on isolation transformers, power distribution, and control components can be found in IEEE Std  844.4/CSA C293.4.2

Scope

This standard provides for the application of impedance heating systems for steel or steel alloy pipe and equipment. It provides recommendations for design, installation, maintenance, and repair of these systems in general industry applications.

This standard applies to impedance heating systems intended to be installed in ordinary and hazardous locations with explosive atmospheres. The hazardous locations include the following:

- In Canada: Zone 2; Zone 22; or Class I, Division 2; Class II, Division 2; Class III, Division 2 as described in CSA C22.1; and

- In the USA: Class I, Zone 2; Zone 22; or Class I, Division 2; Class II, Division 2; Class III, Division 2 as described in the NEC.

This standard, when used with other recognized codes and standards, is intended to cover impedance heating systems in their entirety, including system design, specification, installation, operation, testing, 

commissioning, and maintenance. This document also addresses the following associated systems that are important to the performance of impedance heating systems:

a) Thermal insulation systems;

b) Electric power supply systems;

c) Electric grounding systems; and

d) Control and monitoring systems.

This is a proposed Amendment to C22.2 No. 18.2