37 Construction, installation, maintenance and repair of operation grids for the production, transmission and distribution of electrical energy and electricity; construction, installation, maintenance and repair of apparatus and systems of operation grids for the production, transmission and distribution of electricity; installation, maintenance and repair of electrical installations, apparatus and meters; construction, installation, maintenance and repair of electricity installations, apparatus and conduits; placing, repair, maintenance, substitution, restoration and inspection services aimed at controlling and providing maintenance and repairing services of conduits, cables and service operation grids; construction, installation, maintenance and repair of solar, photovoltaic and wind generators energy installations; installation, repair and maintenance of apparatus, installations and meters for gas, water, electricity and other energy sources; construction, installation, repair, emergency maintenance and maintenance of apparatus, installations and conduits for gas, electricity, water and other energy sources; contractor services for maintenance and repairing in the field of installation of electronic wiring, electrical energy and electricity; maintenance and repair of apparatus for remote meter reading; installation of computerized information systems; installation of data networks and data processing equipments; information and consultation services concerning all the aforesaid services, in particular, in the field of the development, operation and utilisation of electrical energy grid systems, plants and installations and of energy, electrical energy and electricity transmission grids