37
Installation of solar powered systems; Installation of wind power systems; Construction of geothermal energy installations; Installation of electric light and power systems; Installation of power generating apparatus; Maintenance, servicing and repair of power generating apparatus and installations; Repair or maintenance of power distribution or control machines and apparatus; Repair or maintenance of electric lighting apparatus; Providing information relating to the repair or maintenance of electric lighting apparatus; Advisory services relating to the installation of lighting apparatus; Maintenance and repair of electricity generators; Construction of power plants; Advisory services relating to the installation of power plants; Construction of wave energy power plants; Maintenance and repair of wave energy power plants
40
Energy production; Generation of power; Production of electrical power from renewable sources; Consultancy services relating to the generation of electrical power; Leasing of energy generating equipment; Gas production services; Filtration of gases; Purification of gases; Refining of gas; Rental of electricity generators; Rental of boilers; Electricity generating; Production of energy by power plants; Rental of power-generating equipment; Treatment of waste; Rental of air-conditioning apparatus; Rental of heating apparatus