Inverters and power control in Washington
Which codes apply? In Washington, inverters and power control systems fall under the 2023 NEC and the 2021 residential IECC.
Codes that reach inverters and power control systems
The edition Washington enforces for each code that governs the product, and the part of the code that does.
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NECNational Electrical CodeThe Washington NEC record2023 NECVerified
in force since Apr 1, 2024
Where it reaches the product. Article 705, interconnected power sources, with 690 and 706 for the source and the listing the inverter must carry.
Electrical safety standards, administration, and installation (chapter 296-46B WAC), adopting NFPA 70-2023 · WAC 296-46B-010; chapter 19.28 RCW
The 2026 NEC is adopted, not yet in force for December 31, 2026.
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IECC residentialInternational Energy Conservation Code, residentialThe Washington IECC residential record2021 IECCVerified
in force since Mar 15, 2024
Where it reaches the product. Where a state adopts the solar-ready or storage-ready appendix, the space and the conduit the inverter needs.
Washington State Energy Code-Residential, 2021 edition (chapter 51-11R WAC) · WAC 51-11R-10100; chapter 19.27A RCW (RCW 19.27A.045)
The 2024 IECC is proposed for May 3, 2027.
Washington laws that name inverters and power control systems
Statutes, rules, and commission orders are tracked state by state.
No Washington law or rule on the site names inverters and power control systems. The product page shows the states that have one.
For information only. Your local building or fire official decides which code applies. We check state records often but can miss a recent change, so confirm with your official before you design, permit, or install. Terms of use