(1) The erection, construction, alteration, or maintenance by public utilities or municipal departments, boards, or commissions, of overhead, surface or underground gas, electrical steam, or water, distribution or transmission systems, collection, communications (except for wireless telecommunication facilities as regulated in this code), supply or disposal systems, including mains, sanitary sewers, water lines, drains, sewers, pipes, conduits, tunnels, wires, cables, fire alarm boxes, police call boxes, traffic signals, hydrants, poles, electrical substation, gas regulator stations and other similar equipment and accessories in connection therewith, reasonably necessary for the furnishing of adequate service by such public utility or municipal department, board, or commission or for the public health, safety, or general welfare, shall be exempt from the regulations of this code. Provided, however, that the installation shall conform to Federal Communications Commission and Federal Aviation Agency rules and regulations, and those of other authorities having jurisdiction.