Electrical Load Calc NEC
NEC Art.220 Residential Load
About
Calculate residential electrical service sizes accurately using NEC standards. This tool provides step-by-step breakdowns, references official articles, and supports multiple NEC editions for electricians and engineers.
What's New in Electrical Load Calc NEC
1.1.9
June 12, 2026
NEC accuracy update: • Heating/AC per 220.82(C): heat pump 100% + supplemental 65%; space heating 65% (under 4 units) or 40% (4+) • NEC 2026 references corrected to relocated Article 120 numbering (120.82, 120.41, 120.52) • EVSE: 2023 general load per 220.57/220.82(B), 7,200 VA min; 2026 at 100% per 120.82(D) • Service sizes now include 125A, 150A, 225A, 300A, 600A • Heat pump and heat strip presets (29 total) Send feedback to support@tradetools.dev.
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FAQ
What is Electrical Load Calc NEC?
Electrical Load Calc NEC is a utility app designed to help electricians and engineers calculate residential electrical service sizes according to National Electrical Code (NEC) standards. It provides detailed breakdowns and references specific NEC articles for each calculation.
Does Electrical Load Calc NEC have ads?
Yes, Electrical Load Calc NEC contains advertisements. The pro features, available as a one-time purchase, remove ads for a cleaner interface.
What NEC editions does Electrical Load Calc NEC support?
Electrical Load Calc NEC supports both NEC 2023 and the updated NEC 2026 editions. Users can instantly toggle between these editions to see how new rules affect load calculations.
How does Electrical Load Calc NEC calculate loads?
The app calculates loads by taking into account dwelling square footage, appliance presets, custom load entries, and specific NEC rules for lighting, small appliances, laundry circuits, HVAC, and EV chargers.
Can I save my calculations with Electrical Load Calc NEC?
Saving calculation history by job or address is a pro feature. This functionality is available with the one-time purchase of the pro version of the app.
What is the price of Electrical Load Calc NEC?
The base version of Electrical Load Calc NEC is free. There is a one-time purchase option for pro features, which includes ad removal and history saving.
How often is Electrical Load Calc NEC updated?
Electrical Load Calc NEC was last updated on June 12, 2026, with version 1.1.9. This indicates a relatively recent update, suggesting ongoing development and support for the app.
What devices is Electrical Load Calc NEC available on?
Electrical Load Calc NEC is available for iPhone, iPad, and iPod devices. It is designed for users within the Apple ecosystem.