Residential load screens can organize square footage, appliance nameplates, HVAC data, EVSE assumptions, and existing-service context, but they are not a calculation of record. The adopted NEC edition, local amendments, service equipment listing, product instructions, utility rules, permit requirements, and authority having jurisdiction (AHJ) control the final decision.
The ToolGrit residential app keeps legacy 220.82 and 220.83 labels visible because those prompts are still useful for review conversations. Current code structure, adopted-edition language, eligibility, and local interpretation still have to be checked from authorized sources before sizing conductors, overcurrent devices, service equipment, EVSE, or utility service.
Method Labels and Adopted-Code Review
Legacy optional-method prompts can be useful for comparing user-entered loads, but the label alone does not prove eligibility or compliance. Confirm the adopted NEC edition, any 2026 reorganization, local amendments, dwelling-unit scope, service configuration, and AHJ interpretation before relying on any method in a permit package.
Keep the calculator output as a review worksheet: it can show which load assumptions were entered, which local demand prompts were applied, and which records need follow-up. It should not be treated as a yes/no service-capacity or upgrade decision.
Load Input Records
Before any final calculation, collect the actual floor-area basis, appliance nameplates, range and dryer data, water-heater data, HVAC equipment information, EVSE maximum current, load-management settings, and existing-service records. The app can hold those entries, but it cannot verify that the square footage basis, nameplate conversion, branch-circuit treatment, or demand category matches the adopted code.
Continuous loads, fixed appliances, optional-method groupings, and existing-service baselines need project records. Keep photos, nameplates, panel schedules, utility data, manufacturer instructions, and any measured-demand records with the review file so a qualified reviewer can reconcile the inputs.
HVAC, EVSE, and Load Management
HVAC load entries should come from the equipment nameplate, installation manual, Manual J/S review, manufacturer performance data, and any supplemental-heat configuration. A simplified tonnage-to-watt prompt is not a substitute for model-specific MCA, MOCP, auxiliary heat, blower, controls, or simultaneous-operation review.
EVSE entries need the actual product instructions, maximum continuous current, circuit setting, energy-management equipment, listing, load-management configuration, and adopted NEC/AHJ treatment. A reduced value or controlled load cannot be assumed just because a product has a software setting; the installation method and source records matter.
Service Equipment and Conductor Boundaries
Cached service-size and conductor rows are review prompts, not conductor, overcurrent, neutral, grounding-electrode, meter, panelboard, service-entrance cable, or utility-service selections. Actual equipment depends on the adopted code, utility service manual, service equipment listing, terminal temperature ratings, conductor material and insulation, installation conditions, derating, grounding and bonding details, fault-current conditions, and AHJ review.
When a screen appears near a service rating, treat it as a reason to gather better records. The app cannot determine whether a panelboard is listed for the work, whether a utility will approve the service, whether the existing equipment is in safe condition, or whether an upgrade is needed.
What to Carry Forward
A useful review package includes the calculator worksheet, input source notes, appliance and HVAC nameplates, EVSE settings, product manuals, panel photos, utility service data, conductor and equipment markings, existing-load records if used, adopted-code edition, local amendments, permit notes, and AHJ or utility comments. That package lets a qualified reviewer identify which assumptions are reliable and which need replacement.
For customer conversations, label the output as a source-aware screen. It can support scope discussion, estimate planning, and follow-up questions, but it does not replace a stamped design, permit submittal, inspection, utility approval, or safe-work procedure.
Residential Electrical Load Calculator (NEC 220)
Calculate residential electrical service size using NEC 220.82 (new construction) and 220.83 (existing dwelling additions). Step-by-step demand breakdown with HVAC exclusive rule, EV charger loads, conductor sizing for copper and aluminum.