More often than on a 100-amp service, yes — but 200 amps is not a blanket approval. A 48-amp charger, a heat pump, and electric backup strips plus a range and dryer can still add up. Run the load calculation, especially if the quote includes resistance backup heat.
Educational combination: 1,800 ft², 48 A charger, 12 kVA range, 5,400 VA dryer example, 10 kVA heating value:
| 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 | 38,820 VA |
| First 10 kVA at 100%, remainder at 40% | 21,528 VA |
| Larger of the heating or cooling values entered, at 100% | 10,000 VA |
| Calculated load | 31,528 VA · 131.4 A at 240 V |
| Compared with this walk-through’s service rating | 131.4 A is under a 200 A rating by 68.6 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 simplified walk-through is about 131.4 A, under 200 A. Raise the heating value to 15 kVA and it becomes about 152.2 A — still under here, but you are no longer looking at a half-empty service, and measured winter or summer peak may tell a different story. Have the HVAC and electrical quotes share one load sheet, and use the calculator.
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.