Charging Modes 2, 3 and 4
How conductive charging modes differ and why equipment and protection matter.
Mode 2
Mode 2 uses a cable assembly with an in-cable control and protection device for an appropriate socket supply. The actual permissible use depends on the electrical installation, manufacturer instructions and local rules.
Mode 3
Mode 3 is dedicated AC EV charging equipment that communicates with the vehicle for controlled charging. It is frequently used for fixed wallboxes and public AC charge points.
Mode 4
Mode 4 describes DC charging using off-board conversion. Communication and safety requirements are addressed in the applicable IEC 61851 family; DC installations require qualified design and installation.
Installation differs by mode
Mode 2 includes an in-cable control and protection device but does not remove the need to assess the socket and wiring for continuous load. Mode 3 normally uses dedicated AC equipment with vehicle control signalling. Mode 4 uses controlled DC output from off-board equipment.
Procurement evidence
Check the exact applicable IEC 61851 parts, product instructions, rated operating environment, connector and protective measures for the target market. The charging-mode label by itself does not prove that a specific installation is permitted.
Can any household socket be used for Mode 2?
No. Suitability, load, protective devices and local rules have to be checked by qualified professionals.
Primary references
- European Alternative Fuels Observatory — Recharging systems ↗
- IEC — IEC 61851-24:2023 DC charging communication ↗
Educational content, not installation or legal advice. Check current standards and local requirements.
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