US lawWashingtonRegulationsTitle 296 — LABOR AND INDUSTRIES, DEPARTMENT OFChapter 296-46B — ELECTRICAL SAFETY STANDARDS, ADMINISTRATION, AND INSTALLATION296-46B-547WAC 296-46B-547WAC 296-46B-547. Agricultural buildingsLast amended: 2024Year: 2026Length: 29 wordsOfficial source 001 Scope. NEC 547 requirements apply only when the agricultural building is greater than 1,000 square feet and is used as part of a business or commercial farming activity.PreviousWAC 296-46B-517NextWAC 296-46B-550