TSBC Bulletin: Requirements for Electric Vehicle Supply Equipment (EVSE) and Electric Vehicle Energy Management Systems (EVEMS)

March 21, 2025

The purpose of this bulletin is to provide clarity on:

1. Select BC Electrical Code (BCEC) installation requirements.
2. Load calculation requirements.
3. Technical Safety BC Requirements for approval and acceptance of EVEMS equipment.

Definitions from the BC Electrical Code and Product Standards

Electric Vehicle Supply Equipment (EVSE) – A complete assembly consisting of cables, connectors, devices, apparatus, and fittings installed for the purpose of power transfer and information exchange between the branch circuit and the electric vehicle.

Electric Vehicle Energy Management System (EVEMS) – A means used to control electric vehicle supply equipment loads through the process of connecting, disconnecting, increasing, or reducing electric power to the loads and consisting of any of the following: a monitor(s), communications equipment, a controller(s), a timer(s), and other applicable device(s)

Fail-safe (Safe State) — a state where any or all of the following conditions apply:

• the actual load does not exceed the ampere rating of the circuit; and/or
• at the EVSE level, or another level, a pre-configured (default) state that prevents the actual load exceeding the ampere rating of the circuit(s).

*Industry terminology varies amongst manufacturers. This is a “state” or, “mode-of-operation” where the system changes the level of current applied to the circuit depending on pre-set parameters.

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