What is Level 2 charging?
Level 2 Electric Vehicle Supply Equipment (EVSE) operates on a 240-volt alternating current circuit — the same voltage used by electric ranges and clothes dryers in North American homes. A Level 2 unit typically delivers between 3.3 kW and 19.2 kW of power, depending on the circuit amperage and the vehicle's onboard charger capacity.
For most residential purposes, a 32A or 40A circuit paired with a 7.2 kW EVSE is sufficient to fully charge a mid-range electric vehicle overnight. At this rate, the unit adds roughly 40–50 kilometres of range per hour — compared to 6–10 km per hour from a standard 120V Level 1 outlet.
Step 1: Electrical panel assessment
Before any equipment is purchased, a licensed electrician should assess the home's main electrical panel. The key questions are:
- Does the panel have enough available capacity for a dedicated 240V, 40–60A circuit?
- Is the panel in acceptable condition, or does it require replacement or upgrading?
- How far is the panel from the intended charger location, and what wiring path is feasible?
Many homes built before 2000 have 100A service panels. Adding a Level 2 charger on a 40A circuit leaves limited headroom if the home also has electric heat, an EV, and modern appliances running simultaneously. An electrician may recommend upgrading to 200A service — a separate cost that can range from $2,000 to $5,000 depending on the utility and province.
Step 2: Permit requirements
In most Canadian municipalities, installing a dedicated 240V circuit requires an electrical permit issued by the local authority having jurisdiction (AHJ). This typically means the provincial electrical safety authority — for example:
- Ontario: Electrical Safety Authority (ESA)
- British Columbia: BC Safety Authority (Technical Safety BC)
- Alberta: Safety Codes Council
- Quebec: Régie du bâtiment du Québec (RBQ)
The permit is typically applied for by the licensed electrician before work begins. After installation, an inspector visits the site to verify the work meets the Canadian Electrical Code (CEC). Only after passing inspection should the circuit be energised and the EVSE brought into service.
Skipping the permit process is not advisable: unpermitted electrical work can void homeowner's insurance and create liability if a fault occurs.
Step 3: Wiring and circuit installation
A typical Level 2 installation involves running a new dedicated circuit from the panel to the charging location. Common configurations:
| Circuit size | Max EVSE output | Typical wire gauge (copper) | Range added per hour |
|---|---|---|---|
| 30A / 240V | 6 kW (24A continuous) | 10 AWG | ~30–35 km |
| 40A / 240V | 9.6 kW (32A continuous) | 8 AWG | ~40–50 km |
| 50A / 240V | 11.5 kW (46A cont.) | 6 AWG | ~50–60 km |
| 60A / 240V | Up to 19.2 kW | 6 AWG | ~60–80 km |
The CEC requires that the circuit be sized at 125% of the EVSE's continuous load. So a 32A EVSE requires a minimum 40A circuit. Most electricians recommend installing a 50A or 60A circuit even if the current EVSE draws less — this avoids rewiring if the homeowner later upgrades to a higher-output unit.
Step 4: EVSE mounting and connection
Most Level 2 units are wall-mounted in or near the garage. Factors that affect mounting location include cable length (typically 4.5–7.5 metres), proximity to the vehicle's charge port, and protection from weather if installed outdoors. Units rated for outdoor installation carry an IP rating of at least IP54 or NEMA 4X.
EVSE units are connected either to a hardwired junction box or to a NEMA 14-50 or 6-50 receptacle. Hardwired connections are generally considered more secure and are preferred in permanent residential installations.
Step 5: Inspection and commissioning
Following installation, the electrician notifies the AHJ to schedule an inspection. The inspector checks wiring, breaker sizing, grounding, and the EVSE mounting. If the work passes, the permit is closed and the circuit can be energised.
After commissioning, the homeowner should test the charger by initiating a charging session and verifying that the vehicle charges as expected. Wi-Fi-enabled units may require a separate app setup for scheduling and monitoring.
Common complications
Not every installation is straightforward. Issues that can increase cost or complexity include:
- Older panels with fuse boxes rather than breakers — these typically require panel replacement before any new circuits can be added.
- Long wiring runs through finished walls, which require either surface conduit or opening drywall.
- Detached garages that share no conduit path with the main panel — may require underground conduit trenching.
- Shared electrical service in semi-detached or row homes.