{"name":"NEC adoption by US state","description":"The National Electrical Code (NFPA 70) edition in force in each US state, DC and Puerto Rico, with effective dates, pending adoptions and sources.","url":"https://electrician.wiki/standards/nec/adoption/","license":"CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)","attribution":"NEC adoption by state, electrician.wiki (https://electrician.wiki/standards/nec/adoption/), checked 2026-10-14","asOf":"2026-10-14","states":[{"state":"AL","name":"Alabama","edition":"local","effective":null,"amendments":"unknown","notes":"No statewide NEC for general construction; counties/cities adopt and enforce their own editions (the Electrical Contractors Board may adopt the NEC only for exams and may not inspect). Only state-level adoption: Division of Construction Management State Building Code (Ala. Admin. Code 355-12-1) = NFPA 70-2020, effective 2022-07-01, for state-owned/funded work, all K-12 and public post-secondary schools, hotels/motels and movie theaters. Residential: 2015 IRC with AL amendments (effective 2016-10-01) keeps IRC Ch. 34-43 and accepts NEC 2008 or later; from 2027-01-01 builders statewide must follow the state or local residential code (Act 2024-443, Home Builders Licensure Board).","sources":["https://dcm.alabama.gov/bldg_code.aspx","https://admincode.legislature.state.al.us/api/chapter/355-12-1","https://alison.legislature.state.al.us/files/pdf/eopa/audit_reports/25_s_24_25S-24%20Electrical%20Contractors%20Sunset%20Report.pdf","https://adeca.alabama.gov/wp-content/uploads/Alabama-Energy-and-Residential-Code.pdf","https://hblb.alabama.gov/wp-content/uploads/2025/10/HBLB-Law-Effective-October-1-2025.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"AK","name":"Alaska","edition":2020,"effective":"2022-04-16","amendments":false,"notes":"8 AAC 70.025(a) (Dept. of Labor & Workforce Development, Mechanical Inspection) adopts the 2020 NEC by reference with no listed amendments (2017 NESC in (b)). State inspection covers commercial and 3+ unit dwellings; Anchorage inspects under an MOA. Date per AAC history note (Register 242); NFPA table shows 4/16/2020, apparently a typo. Prior: 2017 NEC effective 2018-05-09. No 2023/2026 rulemaking found.","sources":["https://labor.alaska.gov/lss/mihome.htm","https://www.law.cornell.edu/regulations/alaska/8-AAC-70.025","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps","https://www.ecmweb.com/national-electrical-code/article/20903652/alaska-updates-electrical-codes"],"checked":"2026-10-14","confidence":"high"},{"state":"AZ","name":"Arizona","edition":"local","effective":null,"amendments":"unknown","notes":"No statewide electrical code; cities and counties adopt their own NEC editions. Phoenix: 2024 Phoenix Building Construction Code adopts the 2023 NEC, effective 2025-08-01 (HVAC GFCI enforcement deferred to 2027-03-01). The State Fire Code (2018 IFC) covers state/county buildings and schools but is not a statewide electrical code. Tucson/Mesa/county editions not verified.","sources":["https://www.phoenix.gov/administration/departments/pdd/tools-resources/codes-ordinance/building-code.html","https://www.iccsafe.org/advocacy/adoptions-map/arizona/","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"medium"},{"state":"AR","name":"Arkansas","edition":2026,"effective":"2026-09-03","amendments":true,"notes":"Board of Electrical Examiners (Dept. of Labor & Licensing), 17 CAR 210-401 (renumbered from 210-601): 2026 NEC with Arkansas amendments (e.g., AFCI/GFCI not required on dwelling circuits over 130 V except Art. 680/682; dwelling laundry-area and refrigerator/microwave circuit exemptions; relaxed island/peninsula receptacle rule). Arkansas skipped the 2023 NEC (prior: 2020 NEC with AR amendments, effective 2022-08-01; rules effective 2024-03-29 still on 2020 with 210.8(F) excluded). Hearing 2026-04-21; final rule PDF dated 2026-08-24. The 2026-09-03 effective date is from an aggregator and matches the filing timeline but was not read in the AR Register. Cities adopt the \"Arkansas Electrical Code\" locally.","sources":["https://labor.arkansas.gov/wp-content/uploads/17CARpt-210-Final.pdf","https://labor.arkansas.gov/labor/code-enforcement/electrical-inspection-and-licensing/","https://labor.arkansas.gov/wp-content/uploads/Notice-of-Public-Hearing-Electrical-2026.pdf","https://labor.arkansas.gov/wp-content/uploads/17CARpt.-210-Markup.pdf","https://labor.arkansas.gov/wp-content/uploads/Electrical-Rules-effective-3.29.24.dwelling-defined-1-to-4.pdf","https://highfillarkansas.gov/public-hearing-proposed-adoption-of-electrical-code/","https://www.intrysys.com/tools/electrical/nec-adoption-by-state"],"checked":"2026-10-14","confidence":"medium"},{"state":"CA","name":"California","edition":2023,"effective":"2026-01-01","amendments":true,"nextEdition":{"edition":2026,"status":"in-review","effective":"2029-01-01"},"notes":"2025 California Electrical Code (CCR Title 24, Part 3) = 2023 NEC with California amendments, effective 2026-01-01 statewide (including dwellings); local governments may adopt more restrictive amendments with express findings. Prior: 2022 CEC (2020 NEC), effective 2023-01-01. CBSC 2027 Triennial Cycle proposes the 2026 NEC for the 2028 Title 24, effective 2029-01-01.","sources":["https://www.dgs.ca.gov/BSC/Codes","https://www.dgs.ca.gov/-/media/Divisions/BSC/02-Codes/2025-CEC_rev2025-11-20_locked.docx","https://www.dgs.ca.gov/BSC/Rulemaking/2027-Triennial-Cycle","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"CO","name":"Colorado","edition":2026,"effective":"2026-08-01","amendments":false,"notes":"State Electrical Board Rule 1.5 (3 CCR 710-1) incorporates the 2026 NEC with no NEC text amendments and sets 2026-08-01 as its effective date (rule adopted 2026-05-27, effective 2026-07-15). Rule 1.5 C adds multifamily EV-ready requirements under the state Model Electric Ready and Solar Ready Code (HB23-1233), not an NEC amendment. The state inspects where there is no local enforcement; home-rule jurisdictions with their own programs (e.g., Denver) adopt on their own timing. Prior: 2023 NEC (2023-08-01).","sources":["https://www.sos.state.co.us/CCR/eDocketDetails.do?trackingNum=2026-00171","https://www.sos.state.co.us/CCR/Upload/AGORequest/AdoptedRules02026-00171.docx","https://dpo.colorado.gov/Electrical","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"CT","name":"Connecticut","edition":2020,"effective":"2022-10-01","amendments":true,"nextEdition":{"edition":2023,"status":"in-review"},"notes":"Adopted through the Connecticut State Building Code (DAS Office of the State Building Inspector): 2022 CSBC = 2021 I-codes + 2020 NEC with CT amendments (e.g., 90.2, 210.8(F), 250.68(C), 701.7/702.7 signage), for permit applications filed on/after 2022-10-01. IRC electrical chapters 34-43 are deleted, so the NEC governs dwellings too. The 2026 CT codes (2024 I-codes + 2023 NEC) were expected 2026-07-01 but are delayed pending Legislative Regulation Review Committee approval; a ~3-month grace period is planned after they take effect.","sources":["https://portal.ct.gov/das/office-of-state-building-inspector/building-and-fire-code-adoption-process","https://portal.ct.gov/das/home/office-of-state-building-inspector/connecticut-state-building-code/regulations?language=en_US","https://portal.ct.gov/das/knowledge-base/articles/ctbuys/safety-codes-and-inspections/connecticut-state-building-codes-adoption-process","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"DE","name":"Delaware","edition":2023,"effective":"2026-01-01","amendments":false,"notes":"Adopted statewide through the State Fire Prevention Regulations (1 DE Admin. Code 701; State Fire Prevention Commission / State Fire Marshal). Final order of 2025-07-16 (29 DE Reg. 509, 2025-12-01) updated NFPA 70 from 2020 to 2023, effective 2026-01-01. No Delaware NEC text amendments in the referenced-standards list; more stringent county/city ordinances govern (Reg. 701 §1.1.2). No 2026 NEC rulemaking found.","sources":["https://regulations.delaware.gov/register/december2025/final/29%20DE%20Reg%20509%2012-01-25","https://regulations.delaware.gov/api/file/download/79794105-efed-47d6-88d9-7f19ed7018d5","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"DC","name":"District of Columbia","edition":2014,"effective":"2020-05-29","amendments":true,"nextEdition":{"edition":2023,"status":"in-review"},"notes":"2017 DC Construction Codes (2015 I-codes + 2014 NEC + ASHRAE 90.1-2013, amended by 12 DCMR; electrical amendments in 12-C DCMR) effective 2020-05-29 — the oldest NEC edition in this dataset. After the Construction Codes Coordinating Board sunset (2026-02-10) the Department of Buildings leads the update: electrical listening session 2026-07-23, first proposed rulemaking planned fall 2026, final codes targeted late 2027, based on the 2024 ICC codes that reference the 2023 NEC.","sources":["https://dob.dc.gov/page/dc-construction-codes","https://dob.dc.gov/page/construction-code-development","https://www.dcregs.dc.gov/Common/DCMR/SubTitleList.aspx?TitleId=34"],"checked":"2026-10-14","confidence":"high"},{"state":"FL","name":"Florida","edition":2020,"effective":"2023-12-31","amendments":false,"nextEdition":{"edition":2023,"status":"in-review","effective":"2026-12-31"},"notes":"Adopted by reference through the Florida Building Code (Florida Building Commission, Rule 61G20-1.001): FBC 8th Edition (2023) references NFPA 70-2020, effective 2023-12-31; no amendments to NFPA 70 text found (Florida-specific electrical provisions sit in FBC chapters). The 9th Edition (2026) FBC references NFPA 70-2023; Notice of Proposed Rule published 2026-09-23 (comments through 2026-10-14) with a proposed effective date of 2026-12-31. The FBC edition in effect on the permit-application date governs.","sources":["https://www.floridabuilding.org/c/default.aspx","https://www.flrules.org/gateway/ruleNo.asp?id=61G20-1.001","https://www.flrules.org/gateway/readFile.asp?sid=2&tid=31378159&type=1&file=61G20-1.001.doc","https://www.floridabuilding.org/fbc/thecode/2026_Code_Development/ICC_Supplements/Reference_Standards_As_posted_and_revised/Reference_Standards_Building_integrated-1.docx","http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0500-0599/0553/Sections/0553.73.html","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"GA","name":"Georgia","edition":2023,"effective":"2025-01-01","amendments":true,"nextEdition":{"edition":2026,"status":"in-review"},"notes":"Mandatory Georgia State Minimum Standard Code (DCA Board on SCAC recommendation), applicable statewide whether or not locally enforced. 2023 NEC adopted with no amendments effective 2025-01-01; Georgia amendments (packet revised 2026-01-01) effective 2026-01-01 include a narrower 210.8(A) dwelling GFCI list, revised 210.8(D) appliance list, 210.8(F) HVAC exception, revised AFCI locations, island/peninsula receptacles, SPD exemption for one- and two-family dwellings; Art. 517 items effective 2027-01-01 (a Dec 2025 DCA announcement says 2027-01-01 for the packet — conflict noted). IRC Part VIII is deleted, so the NEC governs dwellings. nextEdition is inferred: SCAC approved a \"2027 NEC Subcommittee\" on 2026-07-23.","sources":["https://dca.georgia.gov/announcement/2024-12-02/new-georgia-code-and-amendment-effective-january-1-2025","https://dca.georgia.gov/community-assistance/construction-codes/current-state-minimum-codes-construction","https://dca.georgia.gov/document/document/nec-2026-amendment-packet-2023-edition/download","https://dca.georgia.gov/document/document/scac-minutes-7-23-26-meeting/download","https://dca.georgia.gov/announcement/2025-12-09/new-codes-jan-2027","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"HI","name":"Hawaii","edition":2020,"effective":"2022-03-15","amendments":false,"notes":"State Building Code Council adopted the 2020 NEC as the Hawaii State Electrical Code on 2022-03-15 (administrative title amendment only); state construction had to comply by 2023-03-14 (the date NFPA lists) and counties had until 2024-03-14 to adopt with local amendments, after which it became the interim county code (HRS 107-27/107-28). Honolulu (ROH Ch. 17) lists the 2020 NEC \"Interim\" effective 2024-03-15. UNRESOLVED: an earlier SBCC page and UpCodes said the unamended 2023 NEC became state code automatically under HRS 107-24(c) (~2024-09-01) while the SBCC was suspended by the Governor's housing emergency proclamations; current SBCC and county pages still point to the 2020 NEC. No 2026 NEC process while the SBCC is suspended.","sources":["https://kauai.gov/files/assets/public/v/2/public-works/building-division/documents/2020-nec-code-adoption.pdf","https://ags.hawaii.gov/?p=971","https://www.honolulu.gov/dpp/?p=4665","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps","https://www.hawaiipublicradio.org/local-news/2024-08-27/stakeholders-navigate-building-code-updates-counties-bear-burden","https://up.codes/viewer/hawaii/nfpa-70-2023"],"checked":"2026-10-14","confidence":"medium"},{"state":"ID","name":"Idaho","edition":2023,"effective":"2024-04-19","amendments":true,"notes":"Statewide. Idaho Code 54-1001 (HB 337, effective 2023-07-01) adopts the 2023 NEC by statute; Idaho Electrical Board amendments in IDAPA 24.39.10.600 (many residential GFCI/AFCI/surge/emergency-disconnect exceptions, plus well-pump, PV rapid-shutdown and pole-lighting provisions). DOPL applied the 2023 NEC to permits on/after 2024-04-19 (earlier permits stay on the 2017 NEC); full enforcement by 2025-01-01. NFPA still shows 7/1/2023 with a 2017 allowance (stale). The 2026 negotiated rulemaking (Docket 24-3910-2601) adds exemptions, not the 2026 NEC; a move to 2026 likely needs legislation.","sources":["https://files.dfm.idaho.gov/dfm-admin-website/rules/current/24/243910.pdf","https://admws.idaho.gov/pipermail/dopl-communication/2024-June/000028.html","https://dopl.idaho.gov/wp-content/uploads/2024/07/ELE-Minutes-2024-04-24.pdf","https://dopl.idaho.gov/wp-content/uploads/2026/08/ELE-Negotiated-Rulemaking-Summary-2026-07-17.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"IL","name":"Illinois","edition":"local","effective":null,"amendments":"unknown","notes":"No statewide NEC for general construction; municipalities and counties adopt their own editions. Under PA 103-0510 (Capital Development Board, effective 2025-01-01), commercial buildings in jurisdictions without a building code and state-funded buildings must meet the current or most recent preceding NEC edition (i.e., 2026 or 2023 today). NFPA still lists \"2008 (7/1/11)\" for commercial occupancies outside local adoption authority, which predates PA 103-0510. Chicago: Chicago Electrical Code (Municipal Code Title 14E) based on the 2017 NEC with extensive local amendments, mandatory since 2018-03-01; no newer Chicago update found.","sources":["https://cdb.illinois.gov/business/codes/buildingcodesregulations.html","https://www.chicago.gov/city/en/depts/bldgs/provdrs/bldg_code/svcs/chicago_buildingcodeonline.html","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"IN","name":"Indiana","edition":2008,"effective":"2009-08-26","amendments":true,"dwellings":{"edition":2017,"via":"2020 Indiana Residential Code (2018 IRC, 675 IAC 14-4.4) electrical chapters","effective":"2019-12-26"},"nextEdition":{"edition":2023,"status":"adopted-pending"},"notes":"Commercial and other non-1&2-family work: Indiana Electrical Code 2009 (675 IAC 17-1.8) = 2008 NEC with Indiana amendments (readopted 2015 and 2021). One- and two-family dwellings: 2020 Indiana Residential Code (2018 IRC) whose electrical chapters track the 2017 NEC. Replacement LSA #26-62, the \"2026 Indiana Electrical Code\" — despite the name, the 2023 NEC with Indiana amendments — was finally adopted by the Fire Prevention and Building Safety Commission on 2026-08-04; Attorney General and Governor approval, filing and effective date were still TBD (docket updated 2026-08-18). Indiana rules normally take effect 30 days after filing.","sources":["https://www.law.cornell.edu/regulations/indiana/675-IAC-17-1.8-1","https://www.in.gov/dhs/files/Rulemaking%20Docket%20-%20Electrical%20Code_updated.pdf","https://iar.iga.in.gov/register/20260311-IR-675260062RAA","https://www.law.cornell.edu/regulations/indiana/675-IAC-14-4.4-1","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"IA","name":"Iowa","edition":2023,"effective":"2025-07-01","amendments":true,"nextEdition":{"edition":2026,"status":"in-review"},"notes":"Statewide under Iowa Code ch. 103 (Electrical Examining Board; DIAL inspections). 2023 NEC effective 2025-07-01 (ARC 9033C). Since 2026-06-02, HF 2800 puts the code in statute: NEC = 2023 edition minus 210.52(C)(3), 230.67 and 406.4(D)(4), as altered by Iowa Code 103.1B (e.g., no AFCI in one-/two-family dwellings and townhouses, narrower kitchen/basement GFCI, no GFCI for sump pumps or refrigerators); local governments may not adopt a more restrictive code (103.1C). 2026 NEC: Notice of Intended Action ARC 0549D (IAB 2026-09-02) proposes the 2026 NEC with amendments struck; public hearing 2026-11-09 (ARC 0673D); no effective date yet. The statutory alterations repeal automatically when the 2026 NEC is adopted.","sources":["https://www.legis.iowa.gov/docs/aco/arc/9033C.pdf","https://www.legis.iowa.gov/docs/publications/LGE/91/HF2800.pdf","https://dial.iowa.gov/licenses/building/electrical-permits-inspections","https://www.legis.iowa.gov/docs/aco/arc/0549D.pdf","https://www.legis.iowa.gov/docs/aco/arc/0673D.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"KS","name":"Kansas","edition":"local","effective":null,"amendments":"unknown","stateLevel":{"edition":2008,"scope":"State Fire Marshal fire prevention code (K.A.R. 22-1-3) — fire-safety enforcement, not local electrical permitting","effective":"2011-02-04"},"notes":"No statewide electrical code for general construction; cities and counties adopt and enforce the NEC. The only state-level reference is the State Fire Marshal's Fire Prevention Code (K.A.R. 22-1-3), which adopts NFPA 70-2008 among other NFPA standards; NFPA lists Kansas as \"2008 (2/4/11 - State Fire Marshal)\". Example local adoption: Wichita/Sedgwick County (MABCD) 2023 NEC with local amendments, enforced from 2025-01-01.","sources":["https://www.law.cornell.edu/regulations/kansas/K-A-R-22-1-3","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps","https://www.sedgwickcounty.org/mabcd/codes-resolutions-ordinances/"],"checked":"2026-10-14","confidence":"medium"},{"state":"KY","name":"Kentucky","edition":2023,"effective":"2025-01-01","amendments":true,"nextEdition":{"edition":2026,"status":"in-review"},"notes":"Statewide uniform code: the NEC is incorporated through the Kentucky Building Code (815 KAR 7:120) and Kentucky Residential Code (815 KAR 7:125). 2023 NEC mandatory from 2025-01-01 (replacing the 2017 NEC). For KRC dwellings, 210.52(C), 230.67 and 314.27(C) were delayed to 2026-07-15 (now enforceable); 210.8(A) for receptacles over 125 V and 210.8(D)(8)-(11) GFCI remain delayed (2017 rules apply) pending UL 943/UL 101 revisions. DHBC formed an NEC Task Force (2026-03-18) to review the 2026 NEC; no filing or target date yet.","sources":["https://dhbc.ky.gov/Documents/2023%20NEC%20Update%20Announcement.pdf","https://dhbc.ky.gov/Documents/July%2015%202026%20Memo.pdf","https://dhbc.ky.gov/Documents/26%20NEC%20Task%20Force%20Announcement.pdf","https://apps.legislature.ky.gov/law/kar/titles/815/035/015/","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"LA","name":"Louisiana","edition":2020,"effective":"2023-01-01","amendments":true,"nextEdition":{"edition":2023,"status":"in-review","effective":"2027-01-01"},"notes":"Louisiana State Uniform Construction Code: LAC 17:I.115 adopts the 2020 NEC with Louisiana amendments (e.g., HVAC GFCI exemption, island/peninsula receptacles, surge-protection exemption for manufactured homes, emergency-disconnect marking, CO alarms with standby generators), effective 2023-01-01; the IRC is adopted without Part VIII, so the NEC governs dwellings. Act 881 of 2026 renamed the council LUCCC (2026-08-01); its Notice of Intent (Louisiana Register 2026-08-20) proposes the 2023 NEC with Louisiana amendments plus the 2024 I-codes effective 2027-01-01 (comments closed 2026-09-10; not final).","sources":["https://www.law.cornell.edu/regulations/louisiana/La-Admin-Code-tit-17-SS-I-115","https://icc-nta.org/code-update/louisiana-code-adoption-and-amendments-effective-january-1-2023/","https://lsuccc.la/wp-content/uploads/Louisiana-Register_August-2026-publication.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"ME","name":"Maine","edition":2026,"effective":"2026-07-01","amendments":true,"notes":"Electricians' Examining Board rule 02-318 CMR Ch. 120 (repeal and replace) adopts NFPA 70-2026 with Maine amendments for installations commencing on/after 2026-07-01 (e.g., AHJ may accept products complying with the two previous editions; kitchen GFCI exceptions; HVAC GFCI exception to 2026-09-01 plus Class C SPGFCI option; no GFCI for water/sewer pumps; 2023 version of 110.16 retained; NM thermal-barrier exception; 334.12(2) and 625.43(D)(1)(2) not adopted). Prior: 2023 NEC from 2024-07-01. Local ordinances also apply.","sources":["https://www.maine.gov/pfr/professionallicensing/professions/electricians","https://www.maine.gov/pfr/professionallicensing/sites/maine.gov.pfr.professionallicensing/files/inline-files/Adopted%20Chapter%20120%20%28repeal%20and%20replace%29_0.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"MD","name":"Maryland","edition":"local","effective":null,"amendments":true,"stateLevel":{"edition":2020,"scope":"Maryland Model Performance Code — state-owned/used and modular buildings (COMAR 09.12.50.02-1, with a 210.8(F) HVAC change)","effective":"2023-05-29"},"nextEdition":{"edition":2023,"status":"in-review"},"notes":"Largely local: Public Safety Art. 12-603 requires installations to conform to \"the National Electrical Code\" (no edition stated) or the electrical code adopted by the county; counties and Baltimore City adopt and enforce their own editions, and the Maryland Building Performance Standards leave IBC/IRC electrical chapters out of scope. State-level adoptions: Model Performance Code (2020 NEC, state-owned and modular buildings, amended 2023-05-29); the Dept. of Labor code matrix (2026-03-18) lists the State Fire Marshal's code as 2017 NEC for other buildings. NFPA lists \"2020 (7/1/2025) with MD amendments\" and a 2023 update underway (no state document found for either the 7/1/2025 date or the 2023 update). Business Occupations 6-205 asks the Board of Master Electricians to track the newest NEC within 18 months. County editions not compiled.","sources":["https://mgaleg.maryland.gov/mgawebsite/Laws/StatuteText?article=gps&section=12-603&enactments=false","https://www.labor.maryland.gov/labor/build/buildcodematrix.pdf","https://regs.maryland.gov/us/md/exec/comar/09.12.50.02-1","https://dsd.maryland.gov/regulations/Pages/09.12.51.04.aspx","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"medium"},{"state":"MA","name":"Massachusetts","edition":2026,"effective":"2026-04-24","amendments":true,"notes":"Massachusetts Electrical Code, 527 CMR 12.00 (Board of Fire Prevention Regulations) = 2026 NEC with Massachusetts amendments, for installations whose permit is granted after 2026-04-24. Replaced the 2023-NEC-based edition (early 2023). Later NFPA changes such as TIAs have no force until the BFPR promulgates them.","sources":["https://www.mass.gov/regulations/527-CMR-1200-massachusetts-electrical-code-amendments","https://www.mass.gov/doc/527-cmr-1200-massachusetts-electrical-code-effective-42426/download","https://www.mass.gov/info-details/massachusetts-electrical-code","https://www.icc-nta.org/code-update/new-massachusetts-electrical-code-in-effect/","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"MI","name":"Michigan","edition":2023,"effective":"2024-03-12","amendments":true,"dwellings":{"edition":2023,"via":"2021 Michigan Residential Code Rule 536 sends residential electrical work to the Michigan Electrical Code (Part 8)","effective":"2025-08-29"},"nextEdition":{"edition":2026,"status":"in-review"},"notes":"Michigan Electrical Code = Construction Code Part 8 (R 408.30801-R 408.30880), a single statewide code under 1972 PA 230 (local agencies enforce but cannot adopt other editions). Adopts the 2023 NEC second printing incl. TIAs 70-23-1 to -13 with Michigan amendments (e.g., 230.85 emergency disconnects, 215.18/225.42/230.67 surge), effective 2024-03-12. One- and two-family dwellings were under the 2015 Michigan Residential Code (IRC-based; NFPA lists 2014 NEC) until 2025-08-28; since 2025-08-29 the 2021 MRC requires residential electrical work to comply with the Michigan Electrical Code (2023 NEC). 2026 NEC: Request for Rulemaking 2026-17 LR approved 2026-02-27; drafts dated 2026-03-30 and 2026-08-19, advisory meeting 2026-08-27; not yet filed (MI construction rules usually take effect 120 days after filing).","sources":["https://ars.apps.lara.state.mi.us/Transaction/RFRTransaction?TransactionID=1658","https://www.law.cornell.edu/regulations/michigan/Mich-Admin-Code-R-408-30801","https://ars.apps.lara.state.mi.us/Transaction/DownloadFile?FileName=FinalRule%28s%29.pdf&FileType=FinalRule&TransactionID=1375&EffectiveDate=8%2F29%2F2025","https://www.icc-nta.org/code-update/michigan-electrical-code-part-8-rules-2023","https://www.icc-nta.org/code-update/2021-michigan-residential-code-filed/","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"MN","name":"Minnesota","edition":2026,"effective":"2026-08-17","amendments":false,"notes":"Minnesota Electrical Code = Minn. R. 1315.0200 (State Building Code); the Board of Electricity must adopt the most current NEC (Minn. Stat. 326B.32). The 2026 rule (R-04985) only replaces 2023 with 2026 (no technical amendments): filed 2026-07-20, Notice of Adoption 2026-08-10 (51 SR 161), effective 2026-08-17. Permits filed before 2026-08-17 follow the 2023 NEC (in force since 2023-07-01); licensing exams moved to 2026 on 2026-09-08. Applies statewide to all occupancies including dwellings.","sources":["https://www.dli.mn.gov/business/electrical-contractors/electrical-codes-and-standards","https://www.dli.mn.gov/about-department/rulemaking/rulemaking-docket-minnesota-rules-chapter-1315","https://www.revisor.mn.gov/rules/1315.0200/","https://www.lrl.mn.gov/archive/sonar/SONAR-04985.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"MS","name":"Mississippi","edition":"local","effective":null,"amendments":"unknown","notes":"No statewide NEC for private construction; counties and cities decide whether and which NEC to adopt (the Building Codes Council created by 2006 HB 1406 issues minimum codes that localities may adopt or opt out of). The State Fire Marshal's Fire Prevention Code (2024 IFC/IBC from 2024-07-01) covers state-owned, public assembly and 75-ft-plus buildings but names no NFPA 70 edition. Local example: Biloxi adopted the 2026 NEC (5/5/2026, effective 6/1/2026 per IAEI).","sources":["https://www.mid.ms.gov/sfmo/fce/","https://billstatus.ls.state.ms.us/documents/2006/html/cr/HB1406CR.htm","https://www.icc-nta.org/code-update/mississippi-adopts-new-i-codes/","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps","https://www.iaei.org/page/nec-code-adoption"],"checked":"2026-10-14","confidence":"medium"},{"state":"MO","name":"Missouri","edition":"local","effective":null,"amendments":"unknown","stateLevel":{"edition":2020,"scope":"Public Service Commission code for new modular unit models (20 CSR 4240-123.080)","effective":"2024-11-30"},"notes":"No statewide building or electrical code; each city/county adopts its own NEC edition and many rural areas have none. Reported local editions (secondary, not re-verified): City of St. Louis 2017 NEC (effective 2018-08-01); Kansas City Electrical Code (Building & Rehabilitation Code Art. IV, effective 2020-06-28) reportedly 2017-based with a 2024 update under consideration.","sources":["https://www.law.cornell.edu/regulations/missouri/20-CSR-4240-123-080","https://www.icc-nta.org/states/missouri","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps","https://www.iaei.org/page/nec-code-adoption"],"checked":"2026-10-14","confidence":"medium"},{"state":"MT","name":"Montana","edition":2023,"effective":"2026-09-26","amendments":true,"notes":"Department of Labor & Industry Building Codes Program (ARM Title 24, ch. 301, which amends every incorporated code): 2023 NEC effective 2026-09-26 together with the 2024 I-codes; prior 2020 NEC with MT amendments from 2022-06-10 (the State Electrical Board page still shows the old notice). Uniform statewide for residential and commercial; certified local programs may enforce, state-owned buildings always permitted by the state.","sources":["https://bsd.dli.mt.gov/building-codes-permits/current-codes","https://bsd.dli.mt.gov/building-codes-permits/","https://boards.bsd.dli.mt.gov/electrical/index.html","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"NE","name":"Nebraska","edition":2023,"effective":"2024-08-01","amendments":true,"nextEdition":{"edition":2026,"status":"in-review"},"notes":"Edition set by statute: Neb. Rev. Stat. 81-2104(5) directs the State Electrical Board to use the 2023 NEC except that 2017 NEC requirements apply to 210.8(A), (A)(3), (A)(5) (dwelling GFCI incl. outdoors and basements), 230.67(A) (service surge protection) and 230.85 (emergency disconnects). Enforced by the State Electrical Division from 2024-08-01 where it has jurisdiction; about 30 municipalities and four counties (e.g., Omaha, Lincoln) run their own programs and file their codes with the board. A move to the 2026 NEC needs legislation; the \"in-review\" status rests only on NFPA's note (no bill found).","sources":["https://electrical.nebraska.gov/state-act-update-2023-code-adoption","https://electrical.nebraska.gov/sites/default/files/doc/STATE%20ACT%20REVISED%20VERSION%2006%2026%202026-2.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"NV","name":"Nevada","edition":"local","effective":null,"amendments":"unknown","stateLevel":{"edition":2023,"scope":"State Public Works Board minimum design standards for state buildings (NAC 341.045)","effective":"2024-11-15"},"notes":"No statewide electrical code for private construction; counties and cities adopt their own codes using regional Southern/Northern Nevada amendment packages. The only state NEC adoption is NAC 341.045 (2023 NEC for state buildings, R072-24A, effective 2024-11-15); NFPA and IAEI still show the older 2017 adoption (7/1/2018). The State Fire Marshal (NAC 477.281) does not adopt NFPA 70. Clark County: 2023 NEC with Southern Nevada Amendments, effective 2026-01-11 (Ordinance 5275). Las Vegas, Henderson, North Las Vegas, Reno/Washoe not verified.","sources":["https://www.law.cornell.edu/regulations/nevada/NAC-341-045","https://www.law.cornell.edu/regulations/nevada/NAC-477-281","https://www.clarkcountynv.gov/government/departments/building___fire_prevention/codes/","https://www.icc-nta.org/states/nevada","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"NH","name":"New Hampshire","edition":2023,"effective":"2025-07-01","amendments":true,"notes":"State Building Code (RSA 155-A) applies statewide; the State Building Code Review Board reviews editions and NH amendments and the legislature ratifies them. HB 1059 (2024, retroactive to 2024-07-01) moved the I-codes to 2021 but kept NFPA 70-2020; NFPA reports the 2023 NEC with NH amendments effective 2025-07-01 with a 6-month grace period (RSA 155-A:2 lets either edition be used for 6 months), and Dover lists the 2023 NEC as enforced. The 2025 ratifying legislation was not found (NH .gov sites blocked); some municipal pages (Manchester) still list 2020. SB 437 (2024) requires local amendments to be reviewed by the Board.","sources":["https://www.firemarshal.dos.nh.gov/laws-rules-regulatory/boards-commissions-committees/state-building-code-review-board","https://www.dover.nh.gov/government/city-operations/planning/inspection-services/codes-enforced/","https://www.cityofportsmouth.com/sites/default/files/2024-08/2024_07_01%20Amendments%20to%20the%20NH%20State%20Building%20Code.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"medium"},{"state":"NJ","name":"New Jersey","edition":2023,"effective":"2026-08-17","amendments":true,"notes":"Electrical subcode of the NJ Uniform Construction Code, N.J.A.C. 5:23-3.16 = 2023 NEC with TIAs 70-23-1 to -13 and NJ amendments (e.g., \"electrical subcode official\" for AHJ; 110.17, 110.29, 210.12(E), 225.41, 406.4(D)(4) deleted), adopted by R.2026 d.086, effective 2026-08-17 with the 2024 I-codes. Prior: 2020 NEC with NJ amendments from 2022-09-06 (NFPA still shows this). N.J.A.C. 5:23-1.6 six-month grace period (to about 2027-02-17) lets complete permit applications use the 2020 NEC. Uniform statewide; no local editions.","sources":["https://www.nj.gov/dca/codes/codreg/current.shtml","https://www.nj.gov/dca/codes/codreg/pdf_regs/njac_5_23_3.pdf","https://www.nj.gov/dca/codes/codreg/pdf_regs/njac_5_23.pdf","https://www.iaei.org/page/nec-code-adoption","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"NM","name":"New Mexico","edition":2020,"effective":"2023-03-28","amendments":true,"notes":"2020 New Mexico Electrical Code (14.10.4 NMAC, Construction Industries Division, RLD) adopts the 2020 NEC as amended, effective 2023-03-28 (prior code usable until 2023-09-28); statewide for work under CID jurisdiction, enforced by CID or local programs. No 2023/2026 NEC rulemaking on CID pages, the 2026 rule-hearing notice or the 2026-09-16 Commission agenda (plumbing/mechanical moved to 2024 editions on 2026-08-01).","sources":["https://www.rld.nm.gov/construction-industries/rules-laws-and-building-codes/","https://www.srca.nm.gov/parts/title14/14.010.0004.html","https://www.rld.nm.gov/wp-content/uploads/2026/09/CIC-Regular-Meeting-Agenda-9.16.2026.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"NY","name":"New York","edition":2023,"effective":"2025-12-31","amendments":false,"notes":"Statewide except NYC through the 2025 NYS Uniform Fire Prevention and Building Code (19 NYCRR Parts 1219-1229; 2025 BCNYS/RCNYS on the 2024 I-codes), which references NFPA 70-2023 with no NY amendments to the NEC text; effective 2025-12-31 (optional use 2025-10-01 to 2025-12-30). Replaced the 2020 Uniform Code (2017 NEC). One- and two-family dwellings under the RCNYS may use the IRC-derived electrical chapters 34-43. New York City is separate: 2025 NYC Electrical Code = 2020 NEC with NYC amendments (NYC Admin Code 28-1101.1), fully effective 2025-12-21.","sources":["https://dos.ny.gov/notice-adoption","https://dos.ny.gov/system/files/documents/2026/02/2025-uniform-code-adoption.pdf","https://dos.ny.gov/system/files/documents/2025/12/rule-text_uniform-code_amended-notice-of-adoption_12-2-25_0.pdf","https://codes.iccsafe.org/content/NYSBC2025P1/chapter-35-referenced-standards","https://www.nyc.gov/site/buildings/codes/electrical-code.page","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"NC","name":"North Carolina","edition":2020,"effective":"2021-11-01","amendments":true,"dwellings":{"edition":2017,"via":"NC Residential Code scope (one-/two-family, townhouses up to 3 stories, accessory structures) stays on the 2017 NC State Electrical Code per OSFM interpretation dated 2021-11-01"},"nextEdition":{"edition":2023,"status":"adopted-pending"},"notes":"2020 NC State Electrical Code (2020 NEC + NC amendments), effective 2021-11-01, for other than one- and two-family dwellings. Per an OSFM interpretation (2021-11-01), structures within the NC Residential Code scope (one- and two-family dwellings, townhouses up to 3 stories, accessory structures) remain under the 2017 State Electrical Code (2017 NEC + NC amendments). The 2023 NC Electrical Code (2023 NEC) was accepted by the Building Code Council (2023-12-12) and Rules Review Commission (2024-02) as part of the 2024 NC State Building Code, but its effective date is indefinitely delayed under S.L. 2025-2 sec. 5.12 (12 months after State Fire Marshal certification), so not before 2027; owners may request it as an alternate method. Several aggregators wrongly list NC on the 2023 NEC.","sources":["https://ncosfm.gov/codes/state-electrical-division/state-electrical-code-and-interpretations","https://ncosfm.gov/media/2495/open","https://www.ncosfm.gov/letter-re-2024-state-building-code-effective-date/open","https://www.ncosfm.gov/engineering-newsletter-march-2026/open","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"ND","name":"North Dakota","edition":2026,"effective":"2026-07-01","amendments":true,"notes":"State Electrical Board rules (NDAC 24.1-02-01) reference NFPA 70-2026, effective 2026-07-01 (prior: 2023 NEC effective 2024-07-01). State wiring standards in NDAC 24.1-06 add requirements (e.g., 5% maximum voltage drop, limits on small aluminum conductors, remodel/occupancy-change compliance); the more restrictive of state rules and the NEC governs.","sources":["https://ndlegis.gov/information/acdata/pdf/24.1-02-01.pdf","https://ndlegis.gov/information/acdata/pdf/24.1-06-01.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"OH","name":"Ohio","edition":2023,"effective":"2024-03-01","amendments":true,"dwellings":{"edition":2023,"via":"Residential Code of Ohio (OAC 4101:8) Chapter 34 adopts NFPA 70 directly, with Ohio changes to 210.8, 210.12 and surge protection","effective":"2024-04-15"},"notes":"Two state codes, both on NFPA 70-2023: (1) 2024 Ohio Building Code (OAC 4101:1, 2021 IBC base) for commercial/other buildings, effective 2024-03-01, with an Ohio note that 210.8(F) Exception No. 2 does not expire; (2) Residential Code of Ohio (OAC 4101:8, 2019 RCO/2018 IRC base) for 1-, 2- and 3-family dwellings, whose Chapter 34 adopts NFPA 70 directly — reference changed from 2017 to 2023 effective 2024-04-15, with Ohio changes to 210.8 GFCI, 210.12 AFCI and surge protection (215.18/225.42/230.67). Enforced by BBS-certified local departments.","sources":["https://com.ohio.gov/static/documents/2024%20Ohio%20Building%20Code%20Rules%20Effective%20March%201,%202024.pdf","https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4101-1-35-01","https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4101-8-44-01","https://www.law.cornell.edu/regulations/ohio/Ohio-Admin-Code-4101-8-34-01","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"OK","name":"Oklahoma","edition":2023,"effective":"2024-09-14","amendments":true,"dwellings":{"edition":2023,"via":"2024 IRC electrical chapters 34-43 (OAC 748:20-6), aligned with the 2023 NEC; before 2026-09-14 the 2018 IRC (2017-NEC-aligned)","effective":"2026-09-14"},"nextEdition":{"edition":2026,"status":"in-review"},"notes":"Oklahoma Uniform Building Code Commission adopts the 2023 NEC \"as amended and modified\" as the statewide minimum for commercial electrical construction (OAC 748:20-10, effective 2024-09-14; TIAs/errata not incorporated; prior 2020 NEC 2022-09-14). Dwellings are under the IRC: the 2024 IRC electrical chapters 34-43 (aligned with the 2023 NEC) took effect 2026-09-14 with OK changes (E3601.8 emergency disconnect struck; E3902.14 outdoor-outlet GFCI exceptions for listed HVAC and garage refrigerators/freezers). A 2026 NEC technical review committee is meeting (proposals closed 2026-06-30); OUBCC rules usually take effect Sept 14.","sources":["https://oklahoma.gov/oubcc/codes-and-rules/national-electrical-code-adoptions.html","https://oklahoma.gov/content/dam/ok/en/oubcc/documents/rules/2022%2009%2014%20NEC%202023%20Permanent%20Rule.pdf","https://oklahoma.gov/oubcc/codes-and-rules/international-residential-code-adoptions.html","https://oklahoma.gov/oubcc.html","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"OR","name":"Oregon","edition":2026,"effective":"2026-10-01","amendments":true,"notes":"2026 Oregon Electrical Specialty Code = 2026 NEC with Oregon amendments (OAR 918-305-0100/-0105, Table 1-E), also adopting seven 2026 NEC TIAs; Permanent Administrative Order BCD 16-2026 filed 2026-09-30, effective 2026-10-01, no phase-in. Includes low-rise residential electrical provisions (the 2026 ORSC does not adopt IRC Chapters 25-43). Prior: 2023 OESC (2023-10-01). Statewide, administered by BCD and local programs.","sources":["https://www.oregon.gov/bcd/codes-stand/Pages/oesc-adoption.aspx","https://www.oregon.gov/bcd/laws-rules/Documents/20261001-2026oesc-adoption-pr.pdf","https://www.oregon.gov/bcd/codes-stand/Documents/26oesc-table1-E.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"PA","name":"Pennsylvania","edition":2020,"effective":"2026-01-01","amendments":true,"nextEdition":{"edition":2023,"status":"in-review"},"notes":"Uniform Construction Code (34 Pa. Code 403.21) adopts the 2021 IBC/IRC, which reference NFPA 70-2020; effective 2026-01-01 (55 Pa.B. 7701). Prior: 2018 I-codes / 2017 NEC from 2022-02-14. The 2021 IRC electrical chapters are modified (E3901.4.2 island receptacles and E4002.11 excluded; 2015 E3901.11 foyer rule retained; E3601.8 emergency disconnect limited to detached one-/two-family dwellings). Contracts signed before 2026-01-01 could use the prior code if permitted within 6 months. Philadelphia made the 2021 codes (2020 NEC) mandatory for applications on/after 2026-07-01. The Review and Advisory Council is reviewing the 2024 I-codes (2023 NEC); comments open to 2027-02-02.","sources":["https://www.pa.gov/en/agencies/dli/programs-services/labor-management-relations/bureau-of-occupational-and-industrial-safety/uniform-construction-code-home.html","https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/034/chapter403/s403.21.html","https://www.pa.gov/en/agencies/dli/programs-services/labor-management-relations/bureau-of-occupational-and-industrial-safety/uniform-construction-code-home/ucc-review-and-advisory-council.html","https://www.phila.gov/media/20251021080549/B-2501-Implementation-of-2021-International-Codes.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"RI","name":"Rhode Island","edition":2023,"effective":"2025-12-01","amendments":true,"notes":"Rhode Island Electrical Code (SBC-5, 510-RICR-00-00-5) = 2023 NEC with RI amendments (Article 90 references; 210.25 common-area circuits; 230.82 supply-side/meter disconnects; Annexes E and H deleted), effective 2025-12-01 (prior 2020 NEC from 2022-02-01). The RI One and Two Family Dwelling Code (SBC-2, 2021 IRC) deletes IRC Ch. 34-43 and points to SBC-5, so dwellings also follow the 2023 NEC.","sources":["https://rules.sos.ri.gov/regulations/part/510-00-00-5","https://rules.sos.ri.gov/regulations/part/510-00-00-2","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"SC","name":"South Carolina","edition":2020,"effective":"2023-01-01","amendments":true,"nextEdition":{"edition":2023,"status":"adopted-pending","effective":"2027-01-01"},"notes":"SC Building Codes Council regulation (SC Code Regs. 8-1100 to 8-1106) = 2020 NEC with SC changes (modified 210.8(A) GFCI list; 210.8(F) not applicable; modified 210.12(A) AFCI; 230.67 surge protection not applicable); enforced from 2023-01-01. The 2023 NEC regulation (Doc. 5418) became final 2026-05-22 with enforcement on 2027-01-01 (repeals the 230.67 exemption; keeps modified GFCI/AFCI). Mandatory statewide; local modifications need Council approval.","sources":["https://www.scstatehouse.gov/coderegs/Chapter%208.pdf","https://www.scstatehouse.gov/regs/5418.docx","https://www.scstatehouse.gov/state_register.php?first=FILE&pdf=1&file=Sr49-10.pdf","https://www.scstatehouse.gov/state_register.php?first=FILE&pdf=1&file=Sr46-6.pdf","https://www.scstatehouse.gov/code/t06c009.php","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"SD","name":"South Dakota","edition":2023,"effective":"2024-11-12","amendments":true,"nextEdition":{"edition":2026,"status":"in-review"},"notes":"ARSD 20:44:14:01(11) defines the NEC as the 2023 edition with TIAs 23-1 to 23-15 and SD exceptions (210.8(F) not adopted; RV receptacles other than 125 V 15/20 A exempt from 210.8(A); 210.8(D)(8)-(12) dwelling appliance GFCI not required; NM cable in Type III-V multifamily behind a 15-minute barrier; others), effective 2024-11-12 (permits received on/after that date). Electrical Commission minutes (2026-07-30) show a 2026 NEC rules packet in preparation; next meeting 2026-10-29.","sources":["https://dlr.sd.gov/electrical/default.aspx","https://sdlegislature.gov/api/Rules/20:44:14:01.html","https://boardsandcommissions.sd.gov/bcuploads/minutes-073026.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"TN","name":"Tennessee","edition":2017,"effective":"2018-10-01","amendments":true,"notes":"Statewide minimum set by the Dept. of Commerce & Insurance / State Fire Marshal in Tenn. Comp. R. & Regs. 0780-02-01-.02 (July 2025 revision): 2017 NEC effective 2018-10-01 with exceptions (110.24 available fault current optional; AFCI optional for bathrooms, laundry areas, garages, unfinished basements and refrigeration circuits) plus other TN provisions (e.g., NM boring relief in low basements/crawl spaces). SFMO moved building/fire codes to 2021 I-codes in April 2025 but kept NEC 2017 and IRC 2018. Local governments may not adopt less stringent standards (.17) and may be authorized to inspect (.20) and adopt newer editions — e.g., Chattanooga Ordinance 14204 (2025) adopts the 2023 NEC. No 2020/2023/2026 state rulemaking found.","sources":["https://publications.tnsosfiles.com/rules/0780/0780-02/0780-02-01.20250714.pdf","https://www.tn.gov/commerce/fire/codes-enforcement/history.html","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps","https://register.chattanooga.gov/sites/default/files/resources/14204-2025.01.30-Electricity-v1---PAN-mem_0.pdf"],"checked":"2026-10-14","confidence":"high"},{"state":"TX","name":"Texas","edition":2026,"effective":"2026-09-01","amendments":true,"notes":"TDLR adopts the NEC statewide under Occupations Code ch. 1305 via 16 TAC §73.100. The Commission adopted the 2026 NEC (vote 2026-07-28; Texas Register 2026-08-28, 51 TexReg 5776), effective 2026-09-01, with one amendment: 210.8(F) Exception No. 2 (listed HVAC equipment) retained with no expiration. Prior: 2023 NEC from 2023-09-01. Cities may adopt local amendments (Local Gov't Code §214.214) but per TDLR may not go below the state code. City status varies: Houston announced 2026 NEC effective 2026-09-01; Dallas adopted the 2023 NEC with local amendments effective 2025-05-23; Fort Worth/Austin preparing 2026 amendments. NFPA's 2026-08-03 table predates the adoption (shows 2023).","sources":["https://www.tdlr.texas.gov/news/rulemaking/2026/09/01/commission-adopts-rules-12/","https://content.govdelivery.com/accounts/TXDLR/bulletins/422bc69","https://www.sos.texas.gov/texreg/archive/March202026/Proposed Rules/16.ECONOMIC REGULATION.html","https://denisontx.gov/DocumentCenter/View/4131/2026-National-Electrical-Code-Significant-Changes","https://www.houstonpermittingcenter.org/news-events/2026-national-electrical-code-effective-september-1-2026","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"UT","name":"Utah","edition":2023,"effective":"2025-07-01","amendments":true,"dwellings":{"edition":2020,"via":"2021 IRC electrical chapters 34-43 are the residential standard for IRC-scope dwellings (Utah Code 15A-3-601(1))","effective":"2023-07-01"},"nextEdition":{"edition":2026,"status":"in-review"},"notes":"Adopted by statute in the State Construction Code (Utah Code 15A-2-103(1)(g)) with statewide amendments in 15A-3-6xx; HB 313 (2025) moved the NEC from 2020 to 2023 effective 2025-07-01 (NFPA shows 1/1/2025). HB 65 (2026, effective 2026-07-01) moved most I-codes to 2024 but kept the 2021 IRC and 2023 NEC. One- and two-family dwellings and townhouses under the IRC use the 2021 IRC electrical chapters (2020-NEC-aligned); all other installations use the 2023 NEC. Local amendments only through the Legislature. The UBC Commission Electrical Advisory Committee began reviewing the 2026 NEC on 2026-07-09; adoption requires legislation (2027 session or later). The dwellings.effective date is the 2021 IRC adoption date and was not separately verified.","sources":["https://le.utah.gov/Session/2025/bills/enrolled/HB0313.pdf","https://le.utah.gov/Session/2026/bills/enrolled/HB0065.pdf","https://www.utah.gov/pmn/files/1475735.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"VT","name":"Vermont","edition":2023,"effective":"2025-11-05","amendments":true,"notes":"2025 Vermont Electrical Safety Rules (Electricians' Licensing Board / DPS Division of Fire Safety; SOS rule 25P023) adopt NFPA 70-2023 effective 2025-11-05, replacing the 2020 VESR (2020 NEC, effective 2022-04-15). Vermont amendments include 210.8(A)(11) laundry GFCI within 6 ft, a 210.8(F) Exception No. 3 (water wells, sewage pumps, hardwired EV chargers with integral GFCI), a 210.12(D)(2) AFCI exception, 230.70(A)(1) 10-ft rule, 334.10(3)/334.12(A)(2) changes and 518.6; also adopts NFPA 73-2021 and NFPA 780-2023. Scope excludes owner-occupied single-family dwellings and owner-occupied farm buildings (rentals and rental ADUs are covered). NFPA's table (2020, update underway) is stale.","sources":["https://secure.vermont.gov/SOS/rules/display.php?r=1015","https://firesafety.vermont.gov/sites/firesafety/files/Rules/2025%20Vermont%20Electrical%20Safety%20Rules.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"VA","name":"Virginia","edition":2020,"effective":"2024-01-18","amendments":true,"nextEdition":{"edition":2023,"status":"in-review","effective":"2027-10"},"notes":"Adopted statewide by reference through the Uniform Statewide Building Code (13VAC5-63; DHCD / Board of Housing and Community Development): 2021 USBC (2021 I-codes + 2020 NEC) effective 2024-01-18; the USBC preempts local codes. Virginia NFPA 70 amendments via VCC 2701.1.1 (e.g., 334.10 NM cable in multifamily, 700.12). The 2024 Code Development Cycle (2024 I-codes referencing NFPA 70-2023) is under way; DHCD's tentative schedule shows final regulations July 2027 and an effective date around October 2027 (tentative).","sources":["https://www.dhcd.virginia.gov/codes","https://www.dhcd.virginia.gov/2024-code-development-cycle","https://www.dhcd.virginia.gov/sites/default/files/DocX/2024-code-development-cycle/2024-CDC-Stakeholder-Memo-2.pdf","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"WA","name":"Washington","edition":2023,"effective":"2024-04-01","amendments":true,"nextEdition":{"edition":2026,"status":"adopted-pending","effective":"2026-12-31"},"notes":"L&I adopts the NEC in WAC 296-46B-010 with extensive Washington amendments in chapter 296-46B. 2023 NEC effective 2024-04-01 (WSR 24-05-085). Rulemaking AO25-08 (WSR 25-23-069, adopted 2025-11-18, rule effective 2025-12-19) adopts the 2026 NEC in its entirety with a delayed effective date of 2026-12-31 and removes the NM-B temperature-rating restriction; L&I planned a follow-on rulemaking for Washington amendments to the 2026 NEC. Cities with their own electrical inspection programs (e.g., Seattle) must adopt standards at least equal to the state's.","sources":["https://app.leg.wa.gov/WAC/default.aspx?cite=296-46B-010","https://lni.wa.gov/rulemaking-activity/AO25-08/2508CR103.pdf","https://lni.wa.gov/rulemaking-activity/events/electrical-rule-updates-oct7","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"WV","name":"West Virginia","edition":2020,"effective":"2022-08-01","amendments":true,"nextEdition":{"edition":2023,"status":"in-review"},"notes":"State Fire Commission's State Building Code (87CSR4, effective 2022-08-01): 2018 I-codes + 2020 NEC with WV exceptions (AFCI relief for certain one-/two-family renovations; the expired 210.8(F) HVAC delay). Proposed 87CSR4 update to the 2024 I-codes and 2023 NEC: notice 2026-06-29, agency-approved 2026-07-31, filed with the Legislative Rule-Making Review Committee 2026-10-13; needs 2027 legislative authorization (no effective date). The State Fire Code (87CSR1, NFPA 1-2021, effective 2026-07-01) references NFPA 70-2020 and exempts one-/two-family dwellings. The State Building Code is generally enforced only where counties/municipalities adopt it (not confirmed from statute).","sources":["https://apps.sos.wv.gov/adlaw/csr/rule.aspx?rule=87-04","https://apps.sos.wv.gov/adlaw/csr/readfile.aspx?DocId=59387&Format=PDF","https://apps.sos.wv.gov/adlaw/csr/readfile.aspx?DocId=58962&Format=PDF","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"WI","name":"Wisconsin","edition":2023,"effective":"2026-09-01","amendments":true,"notes":"DSPS Electrical Code, Wis. Admin. Code ch. SPS 316: CR 26-016 amended SPS 316.007(1)(a) to incorporate NFPA 70-2023 (with TIAs/errata issued before 2025-01-01), effective 2026-09-01, with Wisconsin modifications; it also repealed the 2011-NEC provision for older one-/two-family dwellings. Prior: 2017 NEC (commercial from 2018-08-01; one-/two-family dwellings from 2020-01-01). Applies statewide to all wiring including dwellings; municipalities may administer and inspect but enforce the state code.","sources":["https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/301_319/316.pdf","https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/301_319/316","https://dsps.wi.gov/a-z-boards-and-councils-list/sps-316-electrical/","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"high"},{"state":"WY","name":"Wyoming","edition":2026,"effective":"2026-07-01","amendments":false,"notes":"W.S. 35-9-120(a) requires installations to meet the NEC (no edition named); the Dept. of Fire Prevention & Electrical Safety lists the 2026 NEC among the \"State of Wyoming Adopted Codes\". The 2026-07-01 date comes from NFPA and matches the prior pattern (2023 NEC in effect 2023-07-01); no primary document with the date or any Wyoming amendments was found. Local jurisdictions that enforce electrical (e.g., Cheyenne, Casper/Natrona, Gillette/Campbell, Laramie, Sheridan, Jackson/Teton) must adopt equal or stricter standards within 6 months (W.S. 35-9-121). No statewide IRC; the NEC governs residential electrical.","sources":["https://wsfm.wyo.gov/electrical-safety","https://wsfm.wyo.gov/home-1/electrical-board-and-fire-council","https://www.nfpa.org/education-and-research/electrical/nec-enforcement-maps"],"checked":"2026-10-14","confidence":"medium"},{"state":"PR","name":"Puerto Rico","edition":2017,"effective":"2018-11-15","amendments":true,"notes":"\"Puerto Rico Codes 2018\" (OGPe/DDEC regulation under Ley 161-2009), adopted 2018-11-15 and effective on filing, amends the 2018 I-codes; electrical provisions require NFPA 70 together with PREPA's \"Reglamento Complementario al Código Eléctrico Nacional\" (Reg. 5676-1997), which prevails in conflicts. The PR amendments name no NEC edition, so 2017 is inferred from the 2018 I-code reference lists. Ley 161 requires a code review at least every 3 years; a newer adoption could not be ruled out. Not in NFPA's table. Provisional.","sources":["https://docs.pr.gov/files/DDEC/OGPe/Reglamentos/Puerto_Rico_Codes_2018.pdf","https://docs.pr.gov/files/OGPe/Leyes%20y%20Reglamentos/Ley_161_Enmendada_2026.pdf","https://docs.pr.gov/files/JP-Junta%20de%20Planificacion/Reglamentos%20de%20Planificaci%C3%B3n/Reglamento-Conjunto-de-Emergencia-searchable.pdf"],"checked":"2026-10-14","confidence":"low"}]}