NEC Article 625 EV Charging
Can I Charge an EV From a Dryer Outlet?
Yes, a 4-prong dryer outlet is a real Level 2 charging option. Here is the speed you get, the 24-amp limit and why, the adapter you need, and the safety catch with old 3-prong outlets.
Which Dryer / 240V Outlet Can Charge an EV?
| Outlet | Circuit | Charge Rate | For EV Charging |
|---|---|---|---|
| NEMA 14-30 (4-prong dryer) | 30A | 24A / 5.8 kW | Yes, use a 14-30 adapter |
| NEMA 10-30 (3-prong dryer) | 30A | no ground | Avoid, no equipment ground |
| NEMA 14-50 (range/RV) | 50A | 40A / 9.6 kW | Yes, faster |
Charge rate is 80% of the circuit for a continuous load (NEC 210.21(B), 625.42): 30A x 0.8 = 24A, 50A x 0.8 = 40A. A 4-prong outlet has the ground a mobile-connector adapter needs.
The Two Rules That Matter
One load at a time. A dryer outlet is one 30A circuit, so the dryer and the car share it. Charging while the dryer runs would overload the circuit, so use the outlet for one appliance at a time (charge overnight, dry during the day) or have an electrician add a second dedicated circuit. Never use a splitter that lets both run together unless it is a listed automatic load-management device that switches between them.
Ground matters. Only the 4-prong NEMA 14-30 has a dedicated equipment ground, which is what keeps the connection safe if a fault occurs. The older 3-prong NEMA 10-30 bonds the frame to the neutral and has no separate ground, so automakers generally do not sell a 10-30 adapter. If your laundry has a 10-30, the right move is to convert it to a grounded 14-30 or run a dedicated EV circuit.
Want a Faster, Dedicated Circuit Instead?
If 24A overnight is not enough, size a dedicated 40A or 48A circuit here and see the wire, breaker, GFCI, and whether your panel has room.
Frequently Asked Questions
Can I charge my EV from a dryer outlet?
Yes, if it is a modern 4-prong NEMA 14-30 dryer outlet, using your car's mobile connector with a NEMA 14-30 adapter. It charges at 24A continuous (about 5.8 kW), roughly 20 miles of range per hour for a typical EV, which is plenty for overnight charging. The 30A dryer circuit limits you to 24A because a continuous load may only use 80% of the circuit (NEC 210.21(B), 625.42). You cannot run the dryer and the car at the same time, since they share one 30A circuit.
How fast does an EV charge on a dryer outlet?
At 24A / 240V a dryer outlet delivers about 5.8 kW, which adds roughly 18 to 25 miles of range per hour depending on the vehicle's efficiency. Over a 10-hour overnight window that is 180 to 250 miles, enough for almost any daily commute. It is slower than a dedicated 48A charger (11.5 kW, about 35-44 miles per hour) but far faster than a standard 120V outlet, which adds only 3 to 5 miles per hour.
Is it safe to charge an EV from a dryer outlet?
It is safe with a 4-prong NEMA 14-30 outlet and a proper UL-listed adapter, because the 14-30 has a dedicated equipment ground. Use the car's mobile connector set to 24A, do not use a splitter to run the dryer and car together, and make sure the outlet and its wiring are in good condition, since old dryer receptacles can be worn. Avoid the old 3-prong NEMA 10-30 outlet: it has no separate ground, only two hots and a neutral, so the frame safety a modern ground provides is missing, and most automakers do not offer a 10-30 adapter for that reason.
What is the difference between a 14-30 and a 10-30 dryer outlet?
A NEMA 14-30 is the modern 4-prong dryer outlet with two hots, a neutral, and a separate ground, required for new circuits since the 1996 NEC. A NEMA 10-30 is the older 3-prong outlet with two hots and a neutral and no separate ground. For EV charging, use only the 14-30: its ground is what makes the mobile-connector adapter safe. If your home has a 10-30, the safer path is to have an electrician convert it to a grounded 14-30 or run a dedicated EV circuit.
Do I need an electrician to charge my EV from a dryer outlet?
Not to plug in: a mobile connector plus a listed NEMA 14-30 adapter is a plug-in solution you can use yourself on an existing 4-prong outlet. You would call an electrician if you want to add a second dedicated outlet so you are not sharing with the dryer, convert an old 10-30 to a grounded 14-30, or install a hardwired charger, which must be on its own individual branch circuit (NEC 625.40) and cannot share the dryer circuit.
Related EV References
NEMA 14-50 Wire Size
Step up to a 50A outlet for 40A / 9.6 kW charging, nearly double a dryer outlet.
Hardwired vs Plug-In
When to move from a shared outlet to a dedicated hardwired 48A charger.
3-Wire vs 4-Wire Dryer
Why 14-30 has a ground and 10-30 does not, and how to convert.
EV Charger Calculator
Wire, breaker, panel, and GFCI for any EV charger install per NEC 625.