If any municipality operates a plant under the provisions of this chapter, such municipality may adopt ordinances regulating the production, control and use of its plant, fixtures and appurtenances; the character and quality of, and the method and plan of installing, piping, wiring and fixtures; the use and inspection of the same, including the use of the product of such plant for the protection of persons and property and the appointment, term and salary of an inspector or inspectors, as the case may be, of gas and electric piping, wiring, fixtures and appliances, which inspector or inspectors shall be appointed by a board of gas commissioners, board of electrical commissioners or board of gas and electrical commissioners, as the case may be, as provided in section 7-216, which ordinances may provide a penalty not exceeding fifty dollars for any violation thereof. No provision hereof shall affect the authority of the Public Utilities Regulatory Authority over such plants.