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CAN CSA E60335-2-12-13 (2018): Safety Requirements for Warming Plates and Similar Appliances in the Canadian Context
A comprehensive guide to the Canadian adoption of IEC 60335-2-12, covering scope, key technical provisions, implementation strategies, and compliance pathways for warming plates and similar household appliances
Scope of CAN/CSA E60335-2-12-13 (2018)
CAN/CSA E60335-2-12-13 (2018) is the Canadian adoption of IEC 60335-2-12 (Edition 6.0, including Amendment 1) and specifies safety requirements for warming plates and similar appliances used in household and similar environments. This standard is part of the national adoption of the IEC 60335 series under the auspices of the Canadian Standards Association (CSA Group).
The standard applies to electric warming plates, warming trays, and similar portable or fixed appliances intended to keep food or plates warm at temperatures typically below cooking ranges. It covers appliances with a rated voltage not exceeding 250 V for single-phase and 480 V for other appliances. The standard does not cover commercial catering equipment, appliances intended for industrial use, or those used in locations where special conditions prevail (e.g., corrosive or explosive atmospheres).
Scope Clarification: “Similar appliances” includes heated serving trolleys, food warmers, and heated mats, but excludes cooking appliances such as hotplates or cooktops where food is cooked directly on the surface.
Key Technical Requirements and Safety Provisions
Protection Against Electric Shock
The standard mandates robust protection against electric shock through clear creepage and clearance distances, adequate insulation (basic, supplementary, and reinforced), and secure grounding of exposed metal parts. Appliances must be designed so that they continue to provide protection even after installation, regardless of mounting surface material.
Temperature Rise and Surface Temperatures
A critical technical requirement is the limitation of accessible surface temperatures to prevent burns. Table 1 summarizes key temperature limits for surfaces in normal use:
| Surface type | Maximum permissible temperature | Test condition |
|---|---|---|
| Metal handles and knobs | 55 °C | Steady state at rated wattage |
| Plastic handles and knobs | 75 °C | Steady state at rated wattage |
| Upper heating surface (warming zone) | 150 °C (typical, may vary with appliance type) | 10 min after energization |
| Accessible enclosure surfaces (metal) | 85 °C | Normal operation |
| Accessible enclosure surfaces (glass/ceramic) | 100 °C | Normal operation |
Caution: Temperature limits are measured under the most unfavorable conditions (e.g., maximum ambient temperature of 40 °C). Compliance testing must also consider the temperature of surrounding surfaces such as walls and countertops, which must not exceed 65 °C to prevent fire risk.
Mechanical Strength and Stability
The standard requires that warming plates have sufficient mechanical strength to withstand normal handling and potential misuse. For portable appliances, a stability test is performed on a 10° inclined plane: the appliance must not tip over. Fixed appliances must have secure mounting provisions.
Overheating and Energy Regulation
All appliances must be equipped with a thermal control or limiter to prevent excessive surface temperatures. For appliances that do not rely on a thermostat, a non-self-resetting thermal cut-out is required. The standard also specifies test conditions for heating elements under abnormal operation (e.g., blocked thermostat).
Implementation Highlights for Manufacturers
Design Tip: When designing for compliance, consider the following implementation strategies:
- Clearance management: Ensure that live parts are separated from accessible metal parts by at least 3 mm (clearance) and 4 mm (creepage) for basic insulation, and double for reinforced insulation. Use 3D measurement techniques to verify spacing in complex assemblies.
- Material selection: Choose handle and knob materials with low thermal conductivity and high heat-distortion temperature. Plastics should be UL 94 V-0 rated or equivalent for fire resistance.
- Thermal fuse placement: Place thermal cut-outs as close as possible to the heat source, ensuring they respond to both excessive surface temperature and abnormal current. A redundant secondary fuse is recommended for high-wattage appliances.
- Grounding: Provide a dedicated green/yellow ground wire securely fastened to a brass or copper grounding lug. The resistance between the ground pin and any accessible metal part must not exceed 0.1 Ω.
- Marking and instructions: Permanently mark the rated voltage, wattage, and model number on the appliance. Include warnings about surface temperature in the user manual per CAN/CSA C22.2 No. 0.4.
Compliance and Certification Notes
CAN/CSA E60335-2-12-13 (2018) is a harmonized standard within the Canadian Electrical Code (CEC) framework. Compliance can be demonstrated through:
- Self-declaration by manufacturers under a recognized quality system (ISO 9001) with a technical file prepared.
- Third-party certification by accredited organizations such as CSA, UL, or Intertek (ETL) – the most common route for market access in Canada.
- Testing in accredited laboratories following the test sequences defined in the standard (Clauses 8–16, 19, 21, 22, 29–32).
Streamlined Certification: Because CAN/CSA E60335-2-12-13 (2018) is identical to IEC 60335-2-12:2012 (Ed.6) + A1:2015, manufacturers holding a valid IEC CB test certificate can often convert it to a CSA certification with minimal additional testing. Confirm with the certification body the acceptance of CB reports.
Critical Safety Warning: The standard does not permit the use of PVC-insulated wiring inside the appliance unless the wiring is protected from heat sources exceeding 90 °C. Additionally, all internal wiring must be rated for 125 °C minimum if located near heating elements. Non-compliance may lead to fire hazards and product recalls.
It is essential to consider that the Canadian version may include national differences from the IEC source document. For example, Canada requires supply cords to be of type SJTW or equivalent with a minimum service temperature rating of 60 °C, and all cord connectors must comply with CSA C22.2 No. 21. The standard also mandates that the appliance be marked with the CSA certification mark or equivalent accepted in Canada.
The Canadian Electrical Code (CE Code, Part I) references the CAN/CSA E60335 series for specific appliance categories. Authorities Having Jurisdiction (AHJs) will typically require evidence of compliance through a certification mark from a recognized NRTL (Nationally Recognized Testing Laboratory).
Periodic Review and Updates
CSA Group maintains the standard through periodic reviews. As of 2026, the 2018 edition remains in effect, but users are encouraged to monitor any amendments issued by CSA (e.g., CAN/CSA E60335-2-12-13:2018 A1:2022) to stay current with safety enhancements.
Frequently Asked Questions
Q: What appliances are covered under “similar appliances” in CAN/CSA E60335-2-12-13?
A: The standard covers warming plates, warming trays, heated serving trolleys, food warmers (without cooking function), and heated mats intended for domestic use. Appliances that directly cook food (e.g., hotplates, griddles, deep fryers) fall under other parts of the IEC 60335-2 series (e.g., -2-9, -2-13, -2-38).
A: The standard covers warming plates, warming trays, heated serving trolleys, food warmers (without cooking function), and heated mats intended for domestic use. Appliances that directly cook food (e.g., hotplates, griddles, deep fryers) fall under other parts of the IEC 60335-2 series (e.g., -2-9, -2-13, -2-38).
Q: Is certification to CAN/CSA E60335-2-12-13 mandatory in Canada?
A: While not mandatory at the federal level, provincial electrical codes typically require certification by a recognized certification body (e.g., CSA, cUL, cETL) before appliances can be sold or installed. Most retailers and AHJs will demand a certification mark indicating compliance with the applicable CSA standard.
A: While not mandatory at the federal level, provincial electrical codes typically require certification by a recognized certification body (e.g., CSA, cUL, cETL) before appliances can be sold or installed. Most retailers and AHJs will demand a certification mark indicating compliance with the applicable CSA standard.
Q: How does CAN/CSA E60335-2-12-13 differ from the international IEC 60335-2-12?
A: The Canadian adoption is technically identical to IEC 60335-2-12 Ed.6 + A1:2015. However, it includes national deviations related to supply cord types, marking requirements (bilingual English/French), and references to other CSA standards (e.g., CAN/CSA C22.2 No. 0-M91 for general requirements). No major safety differences exist.
A: The Canadian adoption is technically identical to IEC 60335-2-12 Ed.6 + A1:2015. However, it includes national deviations related to supply cord types, marking requirements (bilingual English/French), and references to other CSA standards (e.g., CAN/CSA C22.2 No. 0-M91 for general requirements). No major safety differences exist.
Q: What is the maximum allowed temperature of the warming surface?
A: The standard does not set a single fixed value, but rather requires that the surface temperature be limited to a value that prevents fire and burn hazards, and that it must not exceed 150 °C under normal conditions for most appliances. The exact limit depends on the appliance type and intended use, as verified by the tests in Clause 11.
A: The standard does not set a single fixed value, but rather requires that the surface temperature be limited to a value that prevents fire and burn hazards, and that it must not exceed 150 °C under normal conditions for most appliances. The exact limit depends on the appliance type and intended use, as verified by the tests in Clause 11.
Article published for informational purposes. For official compliance guidance, refer to the latest edition of CAN/CSA E60335-2-12-13 published by CSA Group, Toronto, Ontario, Canada. © 2026