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May 5, 2022

EIN Bill Burr Code 400By William (Bill) Burr

The Code is a comprehensive document. Sometimes it can seem quite daunting to find the information you need quickly. This series of articles provides a guide to help users find their way through this critical document. It is not the intent of these articles to replace the notes in Appendix B or the explanations of individual requirements contained in the CEC Handbook**but hopefully provide help to navigate the Code.

Section 62 — Fixed electric heating systems.

62-000 Scope states that this is a supplementary or amendatory section of the Code and applies to the installation of electric heating systems for space heating, surface heating and other electric heating system applications. Appendix B and the CE Code Handbook provide additional information.

General

The General requirements, Rules 62-100 to 62-128, apply to all heating system installations.

Rule 62-102 provides Special Terminology definitions that apply to equipment specific to this (For additional information, see the usage marking table in Appendix B).

Rule 62-104 mandates that, in addition to the rules of this section, the manufacturer’s installation instructions, which are part of the approval of the heating device, must be followed. In addition, to ensure equipotential grounding plane safety, all electrically conductive shields, braids, sheaths and coverings and all exposed metal surfaces of heating devices must be bonded.

Rule 62-106 requires that electric heating equipment installed in special hazardous, wet or corrosive locations be specifically marked as suitable for that location.

Rule 62-108 requires that branch circuit connections:

Rule 62-110 specifies that branch circuit insulated conductors

Rule 62-112 specifies that heating devices be installed with sufficient clearance from combustible materials to prevent them from being subjected to temperatures more than 90 °C. Table 67 provides some tabulated clearances

Rule 62-114 outlines the overcurrent protection and grouping of heating devices per Rule 8-104: (Note, the CEC Handbook provides a table)

Rule 62-116 outlines ground fault protection for electric heating systems and that this is equipment protection against fire hazards and not for shock hazards. The difference between ground fault (GF) protection and circuit interruption (GFCI) is the trip level setting: (Appendix B and the CEC Handbook provide additional information)

connected to a Class 1 extra-low-voltage power circuit supplied from the secondary of an isolating transformer that has no direct electrical connection between the primary and secondary windings, is supplied from a branch circuit operating at not more than 150 volts-to ground, and is not grounded,

Rule 62-118 provides the demand factors for service insulated feeder conductors and for heating device circuits as follows: (the CEC Handbook provides some calculation examples)

Rule 62-120 requires that any line voltage temperature control devices be rated for the full current of the equipment they control and, when turned to a marked OFF position either manually or automatically, interrupt the line current and open all ungrounded conductors of the heating circuit.

Rule 62-122 specifies that series trace heater sets must be complete assemblies and have permanent markings not more than 75 mm from one or both ends of the non-heating leads. This requirement also ensures proper installation as per Rule 62-124.

Rule 62-124 provides the installation requirements for series trace heater sets and specifies that the heating portion, including connections, be installed in the heating area. The Rule also specifies that the series trace heater set must not be shortened and must bear the marking as per Rule 62-122. Any trace heater sets not bearing the original markings are considered to have been shortened unless instrument measurements demonstrate that the characteristics of the series trace heater set have not been altered.

Rule 62-126 permits that series trace heater sets at industrial establishments, where qualified persons trained by the manufacturer do maintenance and supervision, may be:

Rule 62-128 provides requirements for the installation of the non-heating leads of heating device sets, which include:

Rule 62-130 restricts locating manually operated heater controls not less than 1 m from a sink, tub, or shower stall measured horizontally. However, a manually operated control may be located not less than 500mm from a sink, tub, or shower if protected by a Class A GFCI or supplied by an Extra-low voltage Class 2 circuit.

Rule 62-132 restricts locating a heating device installed less than 1.8 m above the floor to not less than 1 m from a sink, tub, or shower stall measured horizontally. However, a manually operated control may be located not less than 500mm from a sink, tub, or shower, provided a Class A GFCI protects it

Electric space-heating systems

Rules 62-200 to 62-222 provide the requirements for installing fixed electric space-heating systems. Table 67 outlines the minimum clearances of space-heating systems required by 62-200 and 62-212. Appendix B provides additional guidance.

Rule 62-202 specifies that each enclosed area within which a heater is located must have a temperature control device. However, trace heater sets and heating panel sets may extend into adjacent rooms and have a single temperature control device.

Rule 62-204 mandates a minimum separation of wiring of other circuits from heating devices and an operating ambient of 50 °C unless a minimum 50mm thickness of insulation is interposed or the heating device is marked for a lesser clearance. Other conductors located in heated concrete slabs are considered to be operating in a 40 °C ambient.

Rule 62-206 requires that central units must be installed:

Rule 62-208 governs the location of trace heater sets and heating panel sets and requires that:

maybe installed in or above ceilings not less than 2.4 m above the finished floor, providing a Class A GFCI protects them.

Rule 62-210 provides rules for the installation of heating fixtures and requires that:

Rule 62-212 provides requirements for the installation of trace heater sets and heating panel sets and specifies that:

Rule 62-214 specifies that trace heater sets Installed in plaster or other cementitious material must be

Rule 62-216 specifies that trace heater sets and heating panel sets installed in gypsum board and other cementitious ceiling and wall installations must be run parallel to and with clearance not less than 13 mm on each side of the joist, stud, or nailing strip, and the entire ceiling below covered with gypsum board or other cementitious materials up to 13 mm in thickness. 

Rule 62-218 specifies that trace heater sets and heating panel sets Installed under floor coverings must be installed on floor surfaces that are smooth and flat and completely covered by the appropriate floor coverings. Additionally, FCC non-heating leads may be used for connections to the branch circuit in dwelling units.

Rule 62-220 requires that where multiple infrared radiant heaters of the metal-sheath glowing element type are used on the same branch circuit, a single means of ground fault protection as described in Rule 62-116 may be used in the branch circuit.

Rule 62-222 requires that heaters for sauna rooms be:

Electric surface heating systems

Rule 62-300 outlines that Rules 62-302 to 62-314 apply to fixed surface heating systems for pipe heating, melting of snow or ice on roofs or concrete or asphalt surfaces, soil heating, and similar applications.

Rule 62-302 requires that fixtures exposed to rainfall be provided with a weatherproof enclosure.

Rule 62-304 requires that trace heaters and heating panels installed below the heated surface and:

Rule 62-306 requires trace heater sets on or wrapped around surfaces to be secured in place by suitable, non-damaging fastening devices and installed in such a manner as to avoid damage from movement when wrapped over valves, equipment, or expansion joints in piping systems.

Rule 62-308 requires that trace heater sets and panel sets installed on non-metallic pipes, ducts, or vessels be controlled by a thermostat or other suitable temperature-limiting system so that it does not cause damage.

Rule 62-310 requires that heating panel sets installed on tanks, vessels, or pipes be secured by suitable fastening devices.

Rule 62-312 requires that permanent, legible caution labels be placed on the outermost surface of the thermal insulation or cladding of pipes, vessels, or ducts with electric heating to indicate that they are electrically traced and:

Rule 62-314 governs the requirements of skin effect heat tracing, which is a special form of heating in which an insulated conductor is run inside a ferromagnetic envelope as part of a certified system and requires that skin effect trace heating conforms to the following installation requirements:

Impedance heating

Rules 62-316 and 62-318 apply to Impedance heating, previously called pipeline resistance heating in earlier editions of the Code. 

Rule 62-316 requires that pipe and equipment using impedance heating conform to the following:

Rule 62-318 states that in addition to Section 18, trace heating systems installed in hazardous locations must meet the installation requirements in CSA Standard C60079-30-2.

Other heating systems 

Rules 62-400 to 62-410 apply to other heating systems that are not space or surface heating systems, such as internal pipe heaters, immersion heaters, and hot water tanks.

Rule 62-400 requires trace heaters and panel sets installed within pipes, ducts, or

Vessels to be:

 

Rule 62-402 requires that the overcurrent protection for storage-tank water heaters and associated service, feeder, and branch circuit conductors comply with Rule 62-114

 

Rule 62-404 outlines installation requirements for infrared drying luminaires as follows:

Rule 62-406 applies to induction and dielectric heating and requires that:

Rule 62-408 requires that a bare element water heater be:

In the next installment, we will be discussing Section 64 — Renewable energy systems

 

Source: CSA C22.1:21, Canadian Electrical Code, Part 1 - Safety Standard for Electrical Installations. © 2021 Canadian Standards Association. Please visit store.csagroup.org. With the permission of CSA Group, material is reproduced from CSA Group standard CSA C22.1:21, Canadian Electrical Code, Part 1 - Safety Standard for Electrical Installations. This material is not the complete and official position of CSA Group on the referenced subject, which is represented solely by the Standard in its entirety. While use of the material has been authorized, CSA Group is not responsible for the manner in which the data are presented, nor for any representations and interpretations. No further reproduction is permitted. For more information or to purchase standard(s) from CSA Group, please visit store.csagroup.org or call 1-800-463-6727. 

William (Bill) Burr is an associate member of the Canadian Electrical Code, Part 1, Technical Committee and formerly Chair of the Canadian Advisory Council on Electrical Safety (CACES), Chief Electrical and Elevator Inspector for the Province of BC & the Northwest Territories, Director of Electrical and Gas Standards Development and Director of Conformity Assessment at CSA Group. Bill can be reached at Burr and Associates Consulting billburr@gmail.com.