Mich. Comp. Laws § 460.555

Sec. 5. The commission shall have power to inspect and examine all such electrical apparatus already installed in any public highways, streets or places and all such apparatus hereafter installed, and to investigate from time to time the method employed by persons, firms or corporations transmitting and supplying electricity, and shall have power to order such improvements in such method as shall be necessary to secure good service and the safety of the public and of those employed in the business of transmitting and distributing such electricity, and of any persons liable to be injured by the erection, maintenance and use of such apparatus.