The erection, construction, alteration or maintenance by public utilities or municipal departments or commissions of overhead, surface or underground gas, electrical, steam or water distribution or transmission systems or collection, communication, supply or disposal systems, including mains, drains, sewers, pipes, conduits, tunnels, wires, cables, fire alarm boxes, police call boxes, traffic signals, hydrants, towers, poles, electrical substations, 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 or commission or for the public health, safety or general welfare shall be exempt from the regulations of this chapter; provided, however, that the installation may be subject to obtaining a certificate of compliance from the Planner/Zoning Administrator.