CSA Group CSA C22.2 No. 130:25 National Standard of Canada Requirements for electrical resistance trace heating and heating device sets

Preface

This is the fifth edition of CSA C22.2 No. 130, Requirements for electrical resistance trace heating and heating device sets, one of a series of Standards issued by CSA Group under Part II of the Canadian Electrical Code. It supersedes the previous editions published in 2016, 2003, 1985, and 1974.

The major changes to this edition include

a) clarification of integral components and maximum withstand temperature;

b) addition of requirements for the use of a ground-fault circuit device of the Class A type, for trace heaters and panels <50 mm from the surface of a wall or ceiling;

c) addition of a marking requirement for mechanically protected heaters;

d) clarification between termination kits and integral components and test requirements;

e) expansion of requirements for providing a means to certify product modification kits;

f) revisions to the figures of test fixtures to include exposed and enclosed surfaces and general readability improvements;

g) removal of the insulation deformation requirements after temperature exposure;

h) removal of the flexible polymeric electrical insulation requirements after thermal aging;

i) alignment with the change made in the Canadian Electrical Code (2024); and

j) update of reference standards.

In addition, numerous edits have been performed throughout the document to provide additional information and clarify certain requirements.

This Standard is considered suitable for use for conformity assessment within the stated scope of the Standard.

This Standard was prepared by the Integrated Committee on Trace Heating, under the jurisdiction of the Technical Committee on Wiring Products and the Strategic Steering Committee on Requirements for Electrical Safety, and has been formally approved by the 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.

Interpretations: The Strategic Steering Committee on Requirements for Electrical Safety has provided the following direction for the interpretation of standards under its jurisdiction: “The literal text shall be used in judging compliance of products with the safety requirements of this Standard. When the literal text cannot be applied to the product, such as for new materials or construction, and when a relevant committee interpretation has not already been published, CSA’s procedures for interpretation shall be followed to determine the intended safety principle.”

Notes:

1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.

2) Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.

3) This Standard was developed by consensus, which is defined by CSA Policy governing standardization — Code of good practice for standardization as “substantial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this Standard.

4) To submit a request for interpretation of this Standard, please send the following information to [email protected] include “Request for interpretation” in the subject line:

a) define the problem, making reference to the specific clause, and, where appropriate, include a graphical image;

b) provide an explanation of circumstances surrounding the actual field condition; and

c) where possible, phrase the request in such a way that a specific “yes” or “no” answer will address the issue.Committee interpretations are processed in accordance with CSA Directives and guidelines governing standardization and are available on the Current Standards Activities page at standardsactivities.csagroup.org.

5) This Standard is subject to review within five years from the date of publication. Suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to [email protected] include “Proposal for change” in the subject line:

a) Standard designation (number);

b) relevant clause, table, and/or figure number;

c) wording of the proposed change; and

d) rationale for the change.

1 Scope

1.1 General

This Standard specifies the requirements for trace heaters, surface heaters, and heating device sets for use on system voltages not exceeding 750 V that are intended to be installed in accordance with the Canadian Electrical Code, Part I. It applies to heating devices installed on or in metal and non-metallic pipes, tanks, vessels, and related equipment and to various surface heating applications. Typical applications include

a) the protection of pipes, tanks, and vessels, including fire protection systems, from freezing;

b) maintaining required temperatures on process equipment, including pipes, tanks, and vessels;

c) earth thermal storage;

d) hot water temperature maintenance;

e) surface heating, including floor, ceiling, and wall heating;

f) snow melting; and

g) de-icing of roofs and gutters.

Note: Clearance requirements are specified in the Canadian Electrical Code, Part I. See Annex Eof this Standard.

1.2 Exclusions

This Standard does not apply to

a) devices intended to heat or to stress relieve pipes or vessels using eddy current, induction, skin effect, or electric current passed directly through the pipe or vessel wall (impedance);

b) heating elements using carbon ink dispersion; and

Note: Carbon ink dispersion does not include an extruded polymer material.

c) heating devices that are for use in hazardous locations.

Note: The requirements for heating devices used in hazardous locations are now in CSA C22.2 No. 60079-30-1.

1.3 Terminology

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.

1.4 Units of measurement

The values given in SI units are the units of record for the purposes of this Standard. The values given in parentheses are for information and comparison only.