4
Electrical energy from wind power; Electrical energy from solar power; Electrical energy from renewable sources; Electrical energy from non-renewable sources
9
Electric power distribution apparatus; Apparatus for improving power efficiency; Photovoltaic apparatus for converting solar radiation to electrical energy; Photovoltaic apparatus and installations for generating solar electricity
37
Repair of energy production plants and machines; Maintenance and repair of energy generating installations; Construction of geothermal energy installations; Installation of electric light and power systems; Laying of cable; Installation of electrical and generating machinery; Dismantling of power lines; Mains laying; Repair or maintenance of power generators; Maintenance and repair of electricity generators; Servicing of power generating apparatus and installations; Installation of power generating apparatus; Maintenance and repair of gas and electricity installations; Repair of power generating apparatus and installations; Maintenance of power generating apparatus and installations; Maintenance, servicing and repair of power generating apparatus and installations
39
Distribution by pipeline and cable; Consultancy services relating to the distribution of electricity; Information and advisory services in relation to the distribution of energy; Electricity supply and distribution; Public utility services in the nature of electricity distribution; Transport of natural gas; Transmission of oil or gas through pipelines; Leasing the use of power lines to third parties for the transmission of electricity; Supply [transport] of water through pipes; Supply [transport] of water for domestic use; Supply [transport] of water for industrial use; Supply [transport] of water for agricultural use; Distribution and transmission of electricity; Electricity distribution; Supply of electricity; Electricity distribution via cables; Distribution of energy; Distribution of electricity to households; Distribution of energy for heating and cooling buildings; Distribution of gas; Distribution of heat; Water distribution; Distribution of renewable energy; Transport of water by pipeline; Water distribution and supply; Heat supplying [distribution]; Providing information relating to the distribution of electricity; Storage of energy and fuels
40
Energy production; Consultancy services relating to the generation of electrical power; Generation of power; Generation of electricity from geothermal energy; Generation of gas and electricity; Electricity generating; Generation of electricity from solar energy; Production of electrical power from renewable sources; Production of energy by power plants; Production of hydroelectric power
42
Engineering services relating to energy supply systems; Technological consultancy in the fields of energy production and use; Advisory services relating to the use of energy; Technological consulting services in the field of alternative energy generation; Engineering services in the field of energy technology; Providing technical advice relating to energy-saving measures; Development of energy and power management systems; Professional consultancy relating to the conservation of energy; Energy auditing; Advisory services relating to energy efficiency; Consultancy in the field of energy-saving; Technical advice in connection with energy-saving measures; Rental of meters for the recording of energy consumption; Certification services for the energy efficiency of buildings; Recording data relating to energy consumption in buildings; Technological analysis relating to energy and power needs of others; Design and development of regenerative energy generation systems; Professional consultancy relating to energy efficiency in buildings; Consultancy relating to technological services in the field of power and energy supply; Design and development of energy distribution networks; Engineering services in the field of electrical power and natural gas production