(41) Essential Services: The erection, construction, alteration or maintenance by public utilities or municipal or other governments of underground or overhead gas, electrical, steam or water transmission or distribution systems, collection, communication, supply or disposal systems, including poles, wires, mains, drains, sewers, pipes conduits, cables, fire alarm boxes, police call boxes, traffic signals, hydrants, and other similar equipment, and accessories in connection therewith; reasonable necessity of the furnishing of adequate service by such public utilities or municipal or other government or for the public health or safety or general welfare, but not including buildings.