Free estimate — verify against local code before building
2023 NEC 220.82 Electrical Load Worksheet
For qualified planning review only; verify the adopted NEC edition and every load with the AHJ, utility, and electrician.
What this calculator includes
Audit the arithmetic for a limited 2023 NEC 220.82 optional-method scenario: a new one-family dwelling with a 120/240 V single-phase service of at least 100 A, using the supported load types shown. EVSE is kept outside the 40% general/appliance demand pool. The result is not a service, panel, conductor, breaker, meter, fault-current, or utility design. NEC editions and local amendments vary, and the 2026 NEC reorganizes load calculations into Article 120, so a licensed electrician and the authority having jurisdiction must confirm the permitted method and complete design.
How to use this electrical load calculator
- 01
Confirm this method is eligible
Use only for the limited new one-family dwelling scenario shown, and confirm the locally adopted edition and optional-method eligibility with the AHJ.
- 02
Copy nameplate loads
Use equipment nameplates and approved plans. Enter zero only where the dwelling truly has no such electric load.
- 03
Review each demand step
The breakdown shows which loads enter the 40% pool, which HVAC load governs, and why EVSE remains separate.
- 04
Have the design completed
A licensed electrician must verify omitted loads, noncoincident-load rules, conductor and equipment ratings, available fault current, utility requirements, and the final service design.
Calculation sources and review
Primary references and formula assumptions are linked so you can verify them against the selected product, supplier, and adopted local requirements.
Internal formula review completed July 13, 2026. What this review covers
- NFPA 70 — National Electrical Code development page (opens in a new tab)
Official NFPA source for NEC editions and development information.
- NFPA 2023 NEC committee statement for EVSE load (opens in a new tab)
Documents the 7,200 VA or nameplate minimum used for 2023 NEC 220.57.
- NFPA 2026 NEC Handbook Article 120 material (opens in a new tab)
Shows that 2026 load calculations are organized in Article 120, not Article 220.
- NFPA report on electrical-code adoption variation (opens in a new tab)
Adoption timing and local practices vary by jurisdiction.
Frequently asked questions
Which NEC edition does this calculator use?
It implements the stated 2023 NEC 220.82 planning method for the limited scenario described. It is not a timeless NEC calculator: the 2026 NEC moves load calculations to Article 120, and adopted editions and amendments vary.
Why is EV charging outside the 40% appliance demand pool?
EVSE is a significant dedicated load. This worksheet applies the 2023 NEC 220.57 minimum of 7,200 VA or the entered nameplate, whichever is larger, and adds it separately instead of discounting it as a general appliance.
Does the next standard amp value tell me what panel to buy?
No. It is only a comparison against common nominal values. The permitted service rating and equipment depend on the complete code calculation, utility requirements, conductor and equipment ratings, fault current, and local approval.
Can I use this for an existing dwelling service?
Not as a complete code calculation. Existing-dwelling optional methods and measured-load approaches have different eligibility and rules. Ask the electrician and AHJ which method applies.
What heating systems does the 65% input support?
Only central electric resistance heating that is eligible for that factor under the stated method. Heat pumps, supplemental heat, multiple separately controlled units, thermal storage, and other configurations need the applicable calculation outside this simplified worksheet.