Maybe, but this is a constrained version of the EV-plus-dryer question, not an easy yes. A 40-amp EV branch circuit usually supports 32 amps of continuous charging (32 × 1.25 = 40). A 40-amp dryer circuit is already a large 240-volt load. On a 100-amp service the pairing can clear a light optional-method walk-through and still fail a measured-demand check, especially if the dryer and the charger overlap in the evening.
Educational example: 1,800 ft², a 5,400 VA dryer nameplate (Honda’s published running-watt figure for an electric dryer, used only as a stand-in — use your nameplate), 4,000 VA cooling example, and a 32-amp charger on that 40-amp EV circuit.
| Step (2023-style optional method, educational) | Result |
|---|---|
| General lighting at 3 VA/ft² | 5,400 VA |
| Small-appliance and laundry circuits at 1,500 VA each | 4,500 VA |
| General load including listed nameplates and EVSE | 22,980 VA |
| First 10 kVA at 100%, remainder at 40% | 15,192 VA |
| Larger of the heating or cooling values entered, at 100% | 4,000 VA |
| Calculated load | 19,192 VA · 80.0 A at 240 V |
| Compared with this walk-through’s service rating | 80.0 A is under a 100 A rating by 20.0 A |
Educational walk-through of the optional dwelling-unit method structure in NEC 2023 220.82. Not a permit calculation. 220.82(C) heating/cooling selections can be more involved than “the larger of two numbers,” especially with heat-pump backup strips.
This walk-through is about 80.0 A — under 100 A, but not loosely. Add a 12 kVA range and the same method is much closer to the rating (see the electric-range page). A measured-demand sketch: a 50 A peak × 125% is 62.5 A, plus 32 A is 94.5 A, plus you still have to be honest about whether the dryer was already in that peak. If the charger will run while the dryer runs, do not treat the dryer as leftover capacity.
Listed load management that pauses the charger during a dryer cycle is a different solution from a heavy-up. Use the calculator and the coincident-use dryer page.
This is not a permit calculation, a utility approval, or a substitute for a licensed electrician, HVAC contractor, or the authority having jurisdiction. Panel Headroom is an independent educational site. It is not a utility, a certification body, or a contractor. Electrical and generator work that is done incorrectly can cause fire, shock, or carbon monoxide poisoning. Use the adopted electrical code and manufacturer instructions; pull permits where required.