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CSA C22.2 No. 72-10 (2014): Plugs, Receptacles, and Similar Devices — Technical Requirements and Compliance
Understanding the Canadian Standard for Safe Electrical Connections
CSA C22.2 No. 72-10 (2014), titled Plugs, Receptacles, and Similar Devices, is a foundational Canadian standard published by the Canadian Standards Association (CSA) under the C22.2 series of safety standards for electrical equipment. This standard establishes the minimum safety, performance, and construction requirements for attachment plugs, receptacles, cord connectors, and similar wiring devices intended for use in non-hazardous locations. It is widely referenced in the Canadian Electrical Code (CE Part I) and is harmonized with corresponding U.S. standards such as UL 498, while incorporating specific Canadian requirements.
Scope
The standard applies to devices rated up to 600 V ac or dc, and current ratings up to 200 A, designed for use on circuits that do not exceed 600 V, 50/60 Hz. It covers:
- Attachment plugs and receptacles (non-locking and locking types)
- Cord connectors and inlets
- Flanged inlets and outlets
- Current taps and adapters
- Similar devices intended for electrical connections
Devices covered by this standard are typically used in residential, commercial, and industrial installations. Excluded are those intended for hazardous locations (covered separately by CSA C22.2 No. 72.1), pin and sleeve devices (CSA C22.2 No. 182.1), and appliance couplers (CSA C22.2 No. 42).
Tip: When referencing CSA C22.2 No. 72-10, always verify the device’s intended location category; many products are dual-listed under both No. 72-10 and the hazardous-location supplement No. 72.1.
Technical Requirements
General Construction and Performance
Devices must be constructed of materials that are resistant to impact, heat, and corrosion. All current-carrying parts shall be of brass, copper, or other equally conductive and corrosion-resistant material. Insulating parts must meet minimum flame retardancy and tracking resistance levels per CSA C22.2 No. 0.4. Key performance criteria include:
| Parameter | Requirement | Test Method |
|---|---|---|
| Dielectric voltage withstand | 1,500 V ac between live parts and enclosure (or 2x rated + 1,000 V) | CSA C22.2 No. 0-10 Clause 10 |
| Overload current | 150% of rated current for 1 hour (max 60°C rise) | Temperature rise test |
| Endurance (mechanical) | 6,000 to 10,000 cycles (depending on type) | Continuity and arc extinction test |
| Grounding path continuity | ≤0.1 Ω at 25 A for 60 s | Low-resistance ohmmeter |
| Flammability | V-0 or better for enclosures; V-2 for internal parts | UL 94 or CSA C22.2 No. 0.17 |
All devices must also be subjected to a humidity conditioning test (48 h at 93% RH, 35°C) before dielectric withstand is measured.
Configuration and Interchangeability
CSA C22.2 No. 72-10 (2014) prescribes specific blade and slot configurations to ensure non-interchangeability between different voltage and current ratings. For example, a 15 A, 125 V plug will not physically mate with a 20 A, 250 V receptacle. The standard adopts the NEMA (National Electrical Manufacturers Association) configuration system (e.g., NEMA 5-15, NEMA L14-20) with Canadian-specific markings.
Warning: Devices with the same NEMA configuration but different voltage ratings may still look similar; always verify marking for rated voltage before installation.
Implementation Highlights
Designers and manufacturers must consider the following when applying this standard:
- Material selection: Enclosures require a minimum 1.6 mm wall thickness for thermoplastics; metal enclosures must be at least 1.0 mm steel or 1.8 mm aluminum.
- Wiring terminals: Screw-type terminals must accommodate wire sizes as per Table 3 of the standard; they must also prevent rotation and loosening under vibration.
- Locking devices: Locking-type plugs and receptacles must have a minimum retention force of 2.5 N (for 15 A) to 6.0 N (for 60 A) when engaged.
- Receptacle mounting: Box-mounted receptacles must be 1.3 cm from the mounting surface; flush-mounted receptacles require a minimum recess of 1.6 mm.
All products must bear a CSA certification mark or be manufactured under a CSA Certificate of Compliance. The standard allows for factory testing — each device must pass a dielectric test (1,000 V ac) at the end of the production line.
Success: A well-designed receptacle assembly that passes the endurance and temperature rise tests often meets or exceeds the requirements of both CSA C22.2 No. 72-10 and UL 498, simplifying cross-border market access.
Compliance Notes
Compliance with CSA C22.2 No. 72-10 (2014) is mandatory for devices sold or installed in Canada under the Canadian Electrical Code (CE Code). The standard is recognized by the Standards Council of Canada (SCC) and is accredited as a National Standard of Canada. Key points for regulatory compliance:
- Devices must be tested and certified by a recognized certification body (e.g., CSA, UL, Intertek). The certification mark must be permanently affixed.
- Marking requirements include rated voltage, current, frequency, number of poles and wires, and ‘CSA’ and ‘SCC’ references.
- Field deviations — modifications such as adding or removing grounding blades — void the certification and are not permitted under the CE Code.
- The standard includes a mandatory retesting interval of five years for continuous certification; a significant design change triggers immediate retesting.
Danger: Installing non-certified receptacles in a Canadian building can result in insurance denial, legal liability, and inspection failure. Always look for the CSA mark with the file number.
Frequently Asked Questions
Q: Is CSA C22.2 No. 72-10 (2014) the same as UL 498?
A: They are largely harmonized, but Canadian-specific differences exist — including grounding blade dimensions, marking requirements, and acceptance of 60 Hz only (vs. 50/60 Hz in UL 498). Also, CSA C22.2 No. 72-10 includes additional tests for devices rated above 50 A.
A: They are largely harmonized, but Canadian-specific differences exist — including grounding blade dimensions, marking requirements, and acceptance of 60 Hz only (vs. 50/60 Hz in UL 498). Also, CSA C22.2 No. 72-10 includes additional tests for devices rated above 50 A.
Q: Does this standard cover GFCI receptacles?
A: No — GFCI receptacles are covered separately by CSA C22.2 No. 144, which addresses ground-fault circuit interrupters. However, the mechanical and housing requirements of No. 72-10 still apply to the receptacle portion of a GFCI device.
A: No — GFCI receptacles are covered separately by CSA C22.2 No. 144, which addresses ground-fault circuit interrupters. However, the mechanical and housing requirements of No. 72-10 still apply to the receptacle portion of a GFCI device.
Q: What is the significance of the designation “No. 72-10” versus “No. 72”?
A: The suffix “-10” indicates the edition number (10th edition) published in 2010 with a 2014 reaffirmation/update. The standard is also known as C22.2 No. 72-10 (R2014) in some references.
A: The suffix “-10” indicates the edition number (10th edition) published in 2010 with a 2014 reaffirmation/update. The standard is also known as C22.2 No. 72-10 (R2014) in some references.
Q: Do I need to use this standard for devices intended for 50 Hz markets?
A: CSA C22.2 No. 72-10 (2014) is written for 60 Hz systems typical in North America. For 50 Hz applications, consult the manufacturer’s compliance report or an international standard such as IEC 60884-1.
A: CSA C22.2 No. 72-10 (2014) is written for 60 Hz systems typical in North America. For 50 Hz applications, consult the manufacturer’s compliance report or an international standard such as IEC 60884-1.