Any person, firm or corporation engaged or organized to engage in any such business of transmitting and supplying electricity in 1 or more counties of this state shall, with the consent of the duly constituted city, village and township authorities of the cities, villages and townships in or through which it operates or may hereafter propose to operate, have the right to use the highways, streets, alleys and other public places of such cities, villages and townships: Provided, That in all cases each transmission line used shall have insulation and conductivity in accordance with its voltage. In case it has or procures a franchise from any city, village or township or a right to do business therein, it may transact a local business therein. Nothing herein contained shall be construed to impair any right possessed by any village or township to the reasonable control of its streets, alleys and public places in all matters of mere local concern.