The first search engine built for electrical engineers, PEs and designers. Stop hopping between NFPA, ICC, state boards and a dozen calculators.
Electrical engineers lose hours chasing answers across scattered sources. We put them all in one place — verified, cross-linked and login-simple.
Hover any state for a preview, click for its adopted NEC edition and energy code. Colours show how current each state's code is — greener is newer.
US Electrical Code Map © 2026 SYMATEQ. This compilation of state code adoptions, colour classification and presentation is the intellectual property of SYMATEQ. All rights reserved.
US Electrical Code Map © 2026 SYMATEQ. All rights reserved.
Pick a state on the map
to see its adopted electrical & energy codes.
The adopted NEC edition, energy code and amendment model for every US state — including home-rule cities like NYC, Chicago and Phoenix that run their own codes, plus AHJ notes so you know who issues the permit. Every entry carries a source and a last-verified date.
Search codes — Log In →Solar PV (NEC 690), interconnection (NEC 705), energy storage (NEC 706) and EV charging (NEC 625) requirements mapped state by state — including expedited-permitting states, utility interconnection notes and the adopted edition that governs your project.
See solar & EV codes — Log In →Load calculations to NEC Article 220, wire and breaker sizing, voltage drop, fault current, conduit fill, transformer and generator sizing, grounding, solar and EV circuits, plus lighting calculators — every formula verified against worked examples before it shipped.
Open calculators — Log In →An easy way to interpret the codes: original, section-by-section explanations of the NEC and IECC written by SYMATEQ engineers — what each article means, how it applies in real designs, and where designers most often get it wrong. Our own words, always linked to the official code for verification.
Read the explainers — Log In →Sign up with your email on the hub server — no credit card, no trial clock.
Your account unlocks the full hub — every state, every calculator, every explainer, from any device.
Look up your state's codes, run your calculations and read the NEC & IECC explainers — then get back to designing.
It is a single online platform — a search engine for electrical engineers — that brings together everything an electrical PE or designer in the AEC industry needs day to day: the adopted NEC and energy code for all 50 states, solar and EV codes by state, 30+ NEC-based calculators and plain-English NEC and IECC explainers. One free login replaces a dozen scattered websites.
It varies widely — states currently enforce editions ranging from NEC 2014 to NEC 2023, and home-rule states like Arizona, Kansas and Missouri have no statewide code at all, so the city or county decides. Use the interactive map above to check any state instantly, or open the Hub for the full adopted edition, energy code and amendment model with sources and verification dates.
Solar PV and EV charging installations are governed by the NEC edition your state has adopted — Articles 690, 705 and 706 for solar and storage, Article 625 for EV charging — plus state-level permitting rules and utility interconnection requirements. The hub maps all of these state by state so you can check your project's jurisdiction in seconds.
Yes. Every calculator follows NEC methodology — Article 220 load calculations with correct demand factors, Table 310.16 conductor ampacity with temperature and bundling corrections, Chapter 9 conduit fill, NEC 450 transformer protection and more. Each formula was validated against worked examples before release, and results always cite the code section they come from.
It's built for the electrical side of the AEC industry — electrical engineers, electrical PEs, MEP-firm electrical teams, designers, drafters and estimators who need fast, trustworthy answers on codes, calculations and code interpretation without leaving one tab.
Creating an account is free and unlocks the entire hub. The data is verified, dated and source-linked — but codes change and local amendments vary, so always confirm with the authority having jurisdiction (AHJ) before submitting. Every page carries this disclaimer, and values needing re-confirmation are flagged explicitly rather than presented as final.
SYMATEQ is not affiliated with, endorsed by, or sponsored by the NFPA or ICC. "NEC" and "National Electrical Code" are registered trademarks of the National Fire Protection Association. Map data was web-verified in 2026 and is provided as a starting reference — always verify exact code editions, amendments and data against the officially adopted code for your jurisdiction before relying on it. Base state geometry derived from public-domain sources; the code-adoption compilation, classification and presentation are © SYMATEQ.
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