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CSA C22.2 No. 88-19: Commercial Refrigerating Equipment – Requirements and Compliance
Understanding the Canadian Standard for Electrical Safety of Commercial Refrigeration Appliances
Scope and Application
CSA C22.2 No. 88-19 is a mandatory standard within the Canadian Electrical Code framework, specifically addressing the construction, testing, and safety of commercial refrigerating equipment. This standard applies to factory-assembled refrigerating appliances intended for indoor commercial use, including refrigerated display cases, walk-in coolers, refrigerated vending machines, and ice cream cabinets. The standard covers electrically operated equipment incorporating a refrigeration system with a working pressure not exceeding 2.5 MPa (25 bar) and using non-flammable refrigerants such as R-134a, R-404A, or R-449A.
Excluded from the scope are refrigeration systems intended for household use (covered by CSA C22.2 No. 167), industrial process cooling equipment, and systems using flammable refrigerants (e.g., R-290, R-600a) which must comply with additional requirements in CSA C22.2 No. 60335-2-89. The standard also does not apply to field-assembled systems or equipment designed for hazardous locations.
Note: Although CSA C22.2 No. 88-19 is a national standard of Canada, it is widely referenced by Canadian provinces and territories for electrical safety certification of commercial refrigeration products. Equipment listed to this standard is generally accepted for installation under the Canadian Electrical Code, Part I.
Applicable Equipment Categories
- Refrigerated display and storage cabinets
- Walk-in cooler and freezer condensing assemblies
- Refrigerated automatic merchandisers (vending machines)
- Beverage coolers and ice chests
- Commercial ice cream freezing and dispensing cabinets
Technical Requirements
CSA C22.2 No. 88-19 establishes safety requirements covering electrical, mechanical, and thermal hazards. Key technical parameters include insulation coordination, leakage current limits, touch current thresholds, temperature rise on accessible surfaces, and overcurrent protection. The standard mandates rigorous testing for dielectric strength, voltage withstand, creepage distances, and clearances based on the working voltage and environment (pollution degree).
| Parameter | Requirement / Limit | Test Condition |
|---|---|---|
| Dielectric strength (hipot) | 1.5 kV (basic) / 2.5 kV (reinforced) for 1 min | Between live parts and accessible conductive parts |
| Leakage current (standing) | ≤ 0.75 mA per kg of refrigerant charge (max 5 mA) | At rated voltage, steady-state operation |
| Touch current | ≤ 0.5 mA for parts accessible by operator | Simulating human contact with conductive surfaces |
| Temperature rise on handles / knobs | ≤ 60 K above ambient for metal; ≤ 75 K for plastic | After 1 hour continuous operation |
| Creepage distance (line to ground) | ≥ 4 mm (PTI ≥ 600, pollution degree 2) | Between mains parts and grounded metal |
| Overcurrent protection | Automatic reset breaker or fuse per rated current | Must withstand start-up inrush without nuisance tripping |
Tip: Designers should pay special attention to creepage distances between relay contacts and grounded metal because condensate drainage can aggravate pollution conditions. Use IPX4-rated connectors for any low-voltage sensors located inside the refrigerated space.
Refrigerating System Safety
The standard also requires protection against abnormal operation of the refrigeration circuit: high‑pressure cutout, low‑pressure cutout (for compressors with oil pumps), thermal overload of the compressor motor, and a manual reset mechanism for any safety device that stops the compressor. Refrigerant circuit pressure-containing parts must be rated for 1.5 times the design pressure. The standard references CSA C22.2 No. 106 for electric motors and CSA C22.2 No. 0.4 for grounding and bonding.
Implementation Highlights
Manufacturers implementing CSA C22.2 No. 88-19 should integrate several critical design and quality assurance steps. The standard requires a risk assessment to identify potential hazards (electrical shock, fire, refrigeration system rupture, etc.) and to demonstrate that residual risks are mitigated by design or by warnings. All electrical components must have independent certification to applicable CSA or UL standards.
Success Factor: Early engagement with a recognized Certification Body (CB) like CSA Group or UL can streamline the testing process. Many manufacturers use the pre-compliance test protocols to identify issues with clearances, leakage current, or temperature rise before formal testing.
A key implementation aspect is the bonding and grounding of all accessible non-current-carrying conductive parts. The standard mandates a bonding conductor sized per CSA C22.2 No. 0.4, but with a minimum of 14 AWG (2.08 mm²) copper for refrigerating equipment. Additionally, equipment with a rated input exceeding 16 A must have a supply cord with a corresponding rating and be permanently connected to the electrical installation.
Warning: Do not rely on a remote ground connection through supply cord only if the equipment is intended for connection to a non-locking, general-purpose receptacle. The standard requires a backup bonding connection for any appliance that may be moved or relocated.
Marking and Instructions
The standard requires permanent marking including the manufacturer’s name, model number, electrical ratings (volts, amperes, phase), refrigerant type and charge weight, and reference to CSA C22.2 No. 88-19. Instruction manuals must contain installation, cleaning, maintenance, and service information along with contact data for replacement parts. For equipment requiring periodic defrosting, instructions must warn against use of electric heaters that are not specifically designed for that cabinet.
Compliance and Certification Notes
Certification to CSA C22.2 No. 88-19 is mandatory for all commercial refrigerating equipment sold or installed in Canada, as adopted by most provincial electrical inspectors via the Canadian Electrical Code, Part I (CSA C22.1). Equipment that meets this standard may also require evaluation against Canadian energy efficiency regulations (NRCan) which are separate but often tested concurrently.
The standard is harmonized with UL 471 (Commercial Refrigerated Appliances) and ANSI/NSF 7 (Commercial Refrigerators and Freezers). Therefore, a manufacturer that obtains a CSA mark for CSA C22.2 No. 88-19 can often simultaneously achieve UL listing and NSF sanitation certification through a combined audit.
Critical! Equipment intended for outdoor or wet environments (e.g., rooftop condensing units) must be additionally evaluated for exposure to rain and snow according to CSA C22.2 No. 94.1 (enclosure rating). For such equipment, an enclosure rating of at least IPX4 is required, and the supply cord must be rated for outdoor use and be GFCI-protected.
Accredited certification bodies (e.g., CSA, UL, Intertek) conduct initial type testing and quarterly witness testing for ongoing compliance. Manufacturers should maintain a quality control program that includes production-line hi‑pot testing (1.2 × rated voltage, 2 sec) and grounding continuity checks. Records of these tests must be kept for at least seven years.
Frequently Asked Questions
Q: Does CSA C22.2 No. 88-19 apply to equipment using flammable refrigerants (A2L or A3) ?
A: No. Equipment with flammable refrigerants is covered by CSA C22.2 No. 60335-2-89 (for household) or CSA C22.2 No. 60335-2-40 (for commercial). The 88-19 standard is restricted to non‑flammable refrigerants only. However, some products may combine both standards depending on refrigerant charge and location.
A: No. Equipment with flammable refrigerants is covered by CSA C22.2 No. 60335-2-89 (for household) or CSA C22.2 No. 60335-2-40 (for commercial). The 88-19 standard is restricted to non‑flammable refrigerants only. However, some products may combine both standards depending on refrigerant charge and location.
Q: What is the difference between CSA C22.2 No. 88-19 and UL 471 ?
A: The requirements are largely harmonized, but CSA C22.2 No. 88-19 retains specific Canadian deviations, such as mandatory grounding/bonding rules per CSA C22.2 No. 0.4, different leakage current limits (0.75 mA/kg vs. UL’s 0.5 mA/kg charge), and the requirement for manually reset safety devices. Manufacturers selling in both Canada and the US must test to both standards, but many CBs offer a single combined test program.
A: The requirements are largely harmonized, but CSA C22.2 No. 88-19 retains specific Canadian deviations, such as mandatory grounding/bonding rules per CSA C22.2 No. 0.4, different leakage current limits (0.75 mA/kg vs. UL’s 0.5 mA/kg charge), and the requirement for manually reset safety devices. Manufacturers selling in both Canada and the US must test to both standards, but many CBs offer a single combined test program.
Q: Can I use a non‑CSA approved component (e.g., a compressor imported from Europe) in a CSA-certified assembly ?
A: Yes, provided the component is certified to a recognized standard (IEC, EN, or UL) and is subjected to additional testing in the complete end‑product if not CSA-listed. However, any component that is accessible to the user (such as a plug or switch) must be CSA‑certified. It is strongly recommended to use CSA‑listed components to simplify certification.
A: Yes, provided the component is certified to a recognized standard (IEC, EN, or UL) and is subjected to additional testing in the complete end‑product if not CSA-listed. However, any component that is accessible to the user (such as a plug or switch) must be CSA‑certified. It is strongly recommended to use CSA‑listed components to simplify certification.
Q: How often does the standard get updated ?
A: The timeline for revision of CSA C22.2 standards is typically five to seven years. The current edition (2019) supersedes the 2015 edition. Stakeholders can request changes through the CSA Standards Development process. Manufacturers should monitor CSA’s update schedule and allow at least 18 months for transitional compliance with a new edition.
A: The timeline for revision of CSA C22.2 standards is typically five to seven years. The current edition (2019) supersedes the 2015 edition. Stakeholders can request changes through the CSA Standards Development process. Manufacturers should monitor CSA’s update schedule and allow at least 18 months for transitional compliance with a new edition.
Document prepared in 2026. This article is a technical summary for informational purposes and does not replace the official CSA C22.2 No. 88-19 standard. For complete requirements, refer to the latest edition from CSA Group.