Wis. Stat. § 101.875: Inspections.

(1) All inspections of electrical wiring shall be performed by inspectors certified by the department.

(2) Any rule promulgated under s. 101.82 (2m) may not require the inspection of any of the installation, repair, or maintenance of electrical wiring within an existing industrial facility or an existing manufacturing facility unless the plan for the installation, repair, or maintenance is required to be examined under s. 101.12 (2) by the department or by a municipality that has its examinations accepted by the department under s. 101.12 (3) (a), (am), or (b).