Wash. Admin. Code § 296-46B-550
001 Mobile/manufactured homes - Inspection.
(1) All alterations to the mobile/manufactured home electrical system must be permitted and inspected.
(c) Any circuit or feeder that originates in the mobile/manufactured home panel and feeds an unattached structure or equipment (e.g., detached garage, hot tub, pool, well, septic system, yard lighting, or generation equipment, etc.) requires two inspections. An FAS permit is required for the circuit or feeder from the panel and must terminate in a J-box located under the home's exterior wall near the rim joist. A second permit is required from the electrical section for electrical work from the J-box to the equipment or structure.
032 Mobile/manufactured homes - Service.
(2) If an electrical service is installed on the mobile/manufactured home:
(c) The owner or an electrical contractor must complete the service at the site.
033 Mobile/manufactured homes - Feeder.
[Statutory Authority: Chapter 19.28 RCW, RCW 19.28.031 and 19.28.251. WSR 24-05-085, § 296-46B-550, filed 2/21/24, effective 4/1/24. Statutory Authority: Chapter 19.28 RCW. WSR 13-03-128, § 296-46B-550, filed 1/22/13, effective 3/1/13. Statutory Authority: RCW 19.28.006, 19.28.010, 19.28.031, 19.28.041, 19.28.061, 19.28.101, 19.28.131, 19.28.161, 19.28.171, 19.28.191, 19.28.201, 19.28.211, 19.28.241, 19.28.251, 19.28.271, 19.28.311, 19.28.321, 19.28.400, 19.28.420, 19.28.490, 19.28.551, 2002 c 249, chapters 34.05 and 19.28 RCW. WSR 03-09-111, § 296-46B-550, filed 4/22/03, effective 5/23/03.]