A Level 2 EV charger runs on a 240-volt circuit, and a very common setup is a NEMA 14-50 outlet on a 50-amp circuit, which supports a charger drawing up to 40 amps continuously, though the right amperage depends on the specific charger and your needs. Level 2 chargers come in different power levels, so the circuit and outlet are sized to the charger, not a single universal number. Understanding how the amperage is determined helps you plan an EV charging setup, which a licensed electrician installs.
Here is what amperage outlet a Level 2 EV charger needs.
EV charger circuit sizing depends on the specific charger’s rating and the continuous-load rules, so always confirm the correct circuit and outlet with a licensed electrician and the applicable code.
Level 2 means 240 volts
Level 2 EV charging runs on a 240-volt circuit, as opposed to Level 1 charging, which uses a standard 120-volt outlet. The 240-volt supply is what gives Level 2 its much faster charging. So any Level 2 outlet is a 240-volt outlet, and the question is really what amperage circuit it is on.
The common NEMA 14-50 on a 50-amp circuit
A very common Level 2 setup is a NEMA 14-50 outlet, the 240-volt receptacle also used for ranges, on a 50-amp circuit. On a 50-amp circuit, a plugged-in charger can draw up to 40 amps continuously, because continuous loads are limited to 80 percent of the circuit rating. Many popular Level 2 chargers are designed around this 40-amp draw, which is why the 14-50 on a 50-amp circuit is such a common choice.
It depends on the charger
The right amperage ultimately depends on the specific charger. Level 2 chargers come in various power levels, for example drawing 16, 24, 32, 40, or even 48 amps, and the circuit is sized to the charger’s requirement:
- A charger drawing up to 40 amps commonly uses a 50-amp circuit
- Lower-power chargers use smaller circuits
- A 48-amp charger requires a 60-amp circuit and is typically hardwired rather than on an outlet
So the amperage is matched to the charger, which the manufacturer specifies and an electrician sizes to.
The continuous-load rule
A key reason the circuit is larger than the charger’s draw is the continuous-load rule. EV charging is a continuous load, and continuous loads must not exceed 80 percent of the circuit’s rating. That is why a charger drawing 40 amps needs a 50-amp circuit (40 is 80 percent of 50). This rule is central to sizing EV charging circuits and is why you cannot simply match the breaker to the charger’s amperage.
Outlet vs hardwired
Level 2 chargers can connect through an outlet (like a NEMA 14-50) or be hardwired directly. Lower and mid-power chargers often use an outlet, while higher-power chargers, such as 48-amp units, are typically hardwired. The choice affects the setup, and an electrician advises which suits your charger and installation. Either way, the circuit is sized for the charger and the continuous-load rule.
A Level 2 EV charger runs on a 240-volt circuit, and a common setup is a NEMA 14-50 outlet on a 50-amp circuit, supporting a charger that draws up to 40 amps continuously. But the right amperage depends on the specific charger, since Level 2 units come in different power levels and the circuit is sized to the charger plus the 80 percent continuous-load rule. A licensed electrician sizes and installs the right circuit and outlet or hardwired connection.
Stella Electric installs Level 2 EV charging circuits sized to your charger for homeowners across the Baltimore area and throughout Maryland, with flat-rate pricing and no overtime charges. If you are adding a Level 2 charger, we can size it right. Financing is available on qualifying projects.
