Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
CAN/CSA C22.2 No. 282-17 (2018): Technical Requirements for Plugs, Receptacles, and Couplers for Electric Vehicle Charging
Comprehensive Guide to Safety and Performance Standards for EV Charging Connectors in Canada
CAN/CSA C22.2 No. 282-17 (2018) is the Canadian national standard that specifies safety and performance requirements for plugs, receptacles, and couplers used in electric vehicle (EV) charging systems. Published by the Canadian Standards Association (CSA) and harmonized with UL 2251, this standard applies to connectors intended for both AC and DC charging up to a maximum voltage and current rating specified in the scope. The standard is referenced by the Canadian Electrical Code, Part I (C22.1) and works in conjunction with CSA C22.2 No. 280 (Electric Vehicle Supply Equipment) to ensure end-to-end charging safety.
Scope and Application
CAN/CSA C22.2 No. 282-17 covers plugs, receptacles, and couplers for conductive charging of electric vehicles. The standard applies to devices rated up to 600 V AC or DC, and up to 400 A continuous current. It includes configurations for Level 1 (120 V AC), Level 2 (208–240 V AC), and DC fast charging. The requirements apply to both vehicle connection inlet types (such as J1772 and CCS1) and supply equipment connectors. Exclusions include inductive charging couplings and devices covered by other CSA standards for general-purpose wiring.
Note: This standard does not cover on-board vehicle chargers or battery connectors. It strictly addresses the interconnection points between the EV supply equipment (EVSE) and the vehicle.
Technical Requirements
Electrical Ratings and Performance
Connectors must meet stringent electrical performance criteria under normal and fault conditions. Table 1 summarizes the key electrical parameters prescribed in the standard.
| Parameter | Requirement | Test Condition |
|---|---|---|
| Rated Voltage | 120 V – 600 V AC/DC | Nominal system voltage |
| Rated Current | 20 A – 400 A | Continuous, after thermal equilibrium |
| Dielectric Withstand | 2,200 V AC (250 V rating) 3,500 V AC (>250 V rating) | 1 minute, no breakdown or flashover |
| Insulation Resistance | ≥ 5 MΩ (DC 500 V) | After humidity exposure |
| Temperature Rise | ≤ 50 °C rise at rated current | Ambient 25 °C, all contacts carrying rated current |
Mechanical and Environmental Requirements
Connectors must withstand high insertion/withdrawal cycles, cable strain, and environmental exposure. Key requirements include:
- Mechanical endurance: 10,000 cycles for AC connectors, 1,000 cycles for DC fast-charge connectors.
- Locking mechanism: A mechanical interlock prevents disconnection while under load; the connector must disengage the circuit (via proximity pilot or dedicated switch) before the plug can be removed.
- Ingress Protection (IP): Minimum IP44 for outdoor use (splash-proof); IP67 recommended for DC connectors exposed to submersion.
- Strain relief: Cable retention must resist 150 N pull force without damage or displacement of internal connections.
- Shock resistance: Connectors must survive a 1 m drop onto steel plate without functional damage.
Critical Design Consideration: The locking mechanism must remain engaged at all times during normal charging, releasing only when the pilot signal is interrupted by the EVSE controller. Failure to meet this requirement can lead to arc-flash hazards or vehicle damage.
Contact Design and Materials
Contacts must be made of corrosion-resistant materials (e.g., copper alloy with silver or tin plating). The standard specifies minimal contact force and maximum contact resistance (initial: 0.5 mΩ per contact; after thermal cycling: 2.0 mΩ). Connectors must be wired with conductors rated for at least 90 °C (thermoplastic or thermoset insulation).
Implementation and Design Highlights
Designers integrating CAN/CSA C22.2 No. 282-17 into their products should pay attention to the following aspects to streamline certification:
- Pilot and proximity circuits: The standard requires two auxiliary contacts (control pilot and proximity detection) for all connectors rated above 16 A. These circuits enable interlock functions and temperature monitoring.
- Receptacle orientations: Receptacles mounted on EVSE must allow cable insertion in any orientation within a 90° arc to facilitate user ergonomics.
- Thermal protection: Connectors with integral electronics (e.g., smart connectors with RFID) must pass additional thermal cycling tests to ensure no overheating of control circuits.
Tip: To achieve both CSA and UL certification with minimal retesting, follow the harmonized requirements in Table 2.2 of the standard. Differences (e.g., creepage distances for 600 V DC) are documented; a single design can be pre-evaluated for both marks.
Compliance and Certification Process
Manufacturers must submit product samples to a recognized testing laboratory (e.g., CSA Group, UL) along with a Declaration of Design Conformity. The certification process includes:
- Initial construction review (materials, ratings, markings).
- Sequence of electrical, mechanical, and environmental tests as per Tables 8.1–8.5 of the standard.
- Factory surveillance for ongoing compliance (minimum once per year).
Marking requirements include the certification mark, rated voltage/current, polarity (for DC connectors), and the date code. Connectors intended for outdoor use must also bear a “WET” or “OUTDOOR” marking if tested for exposure.
Non‑Compliance Risk: Use of connectors not listed to CAN/CSA C22.2 No. 282-17 in permanent EVSE installations may contravene provincial electrical codes, void insurance coverage, and expose users to electric shock or fire hazards.
Frequently Asked Questions
Q: Does CAN/CSA C22.2 No. 282-17 cover both AC and DC charging connectors?
A: Yes. The standard applies to connectors for AC Level 1/2 charging (up to 250 V AC) and DC fast charging (up to 600 V DC). However, DC connectors must meet additional requirements for higher voltage and locking mechanisms.
A: Yes. The standard applies to connectors for AC Level 1/2 charging (up to 250 V AC) and DC fast charging (up to 600 V DC). However, DC connectors must meet additional requirements for higher voltage and locking mechanisms.
Q: How does this standard relate to UL 2251?
A: The two standards are technically harmonized. Products certified to CAN/CSA C22.2 No. 282-17 will generally meet UL 2251 after minor differences (e.g., Canadian ratings for 600 V vs. U.S. 600 V class) are addressed. Bi‑national certification is common.
A: The two standards are technically harmonized. Products certified to CAN/CSA C22.2 No. 282-17 will generally meet UL 2251 after minor differences (e.g., Canadian ratings for 600 V vs. U.S. 600 V class) are addressed. Bi‑national certification is common.
Q: What are the marking requirements for compliant connectors?
A: Each connector must be permanently marked with the manufacturer’s name, catalog number, rated voltage/current, and the CSA certification mark. Outdoor-rated connectors require an additional “WET” or “OUTDOOR” marking.
A: Each connector must be permanently marked with the manufacturer’s name, catalog number, rated voltage/current, and the CSA certification mark. Outdoor-rated connectors require an additional “WET” or “OUTDOOR” marking.
Q: Are there any special requirements for connectors used in cold climates?
A: Yes. The standard includes optional cold-impact tests for connectors intended for extreme environments. Contact materials and sealing gaskets must withstand –40 °C without cracking or losing flexibility.
A: Yes. The standard includes optional cold-impact tests for connectors intended for extreme environments. Contact materials and sealing gaskets must withstand –40 °C without cracking or losing flexibility.
— Published: 2026 —