Steam plants, geothermal plants, dander-thermal plants, nuclear plants, ocean thermal energy conservation (OTEC) plants, internal combustion plants, hydraulic plants, pumping plants, compressed gas plants, all kinds of mills, shops, factories, shipyards dry docks, heating, air conditioning, ventilating and refrigeration plants containing any mechanical equipment, machinery or process deriving power from steam, fossil fuels, wind, air, gas, water, solar heat, nuclear energy, ocean waves and tides, or other energy sources