installation of electrical wiring; installation of electrical apparatus; installation of electrical wiring for buildings; installation of electrical appliances; installation of electrical apparatus or generators; installation, maintenance and repair of electrical devices; installation, maintenance and repair of electrical equipment; installation of electrical apparatus for buildings; installation of electrical machinery and generators; installation, maintenance and repair of electrical and electronic apparatus and equipment; installation, maintenance and repair of apparatus for supplying electricity; installation and repair of electrical appliances; renovation, repair and maintenance of electrical wiring; installation, maintenance and repair of electronic, electrical and mechanical apparatus; installation, maintenance and repair of electrical and electronic apparatus for use in the field of automation; repair and maintenance of electrical apparatus; repair of electrical apparatus; installation, maintenance and repair of electrical lighting apparatus; maintenance and repair of electrical apparatus; repair of electrical appliances; installation, maintenance and repair of apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; installation of electric light and power systems; repair and maintenance of electrical appliances; construction work relating to the installation and maintenance of electrical systems; installation, maintenance and repair of apparatus for generating electricity; maintenance and repair of electrical appliances; maintenance of consumer electrical appliances; wiring services for telecommunications; installation of machinery for generating electricity; telecommunication wiring services; advisory services relating to the installation, maintenance and repair of mechanical and electrical equipment; electrical wiring services; electrical installation services; providing information relating to the installation of electrical apparatus; repair of electrical equipment; repair of electrical equipment and electrotechnical installations; electrical equipment repair; electric appliance installation; electric apparatus installation; services of electricians; electric appliance installation and repair; repair or maintenance of electric cooking apparatus and installations; electric appliance repair; electric apparatus repair; repair or maintenance of electric lighting apparatus; providing information relating to the repair or maintenance of electric cooking apparatus and installations; maintenance of electric hotplates; installation of security systems; security system installation; repair of security systems; installation of security and safety equipment; maintenance and servicing of security alarm systems; installation, maintenance and repair of security and safety equipment; maintenance and servicing of security alarms; advisory services relating to the installation of security and safety equipment; installation, maintenance and repair of security and authentication apparatus; maintenance of burglar and security alarms; repair of security locks; installation and repair of home security alarm systems; telecommunication wiring; communications infrastructure construction; installation of communication equipment; installation of communications network instruments; communications network instrument installation; installation of communications network apparatus; installing of electronic communications networks; maintenance of communications equipment; advisory services relating to the installation of communication equipment; communications network apparatus installation; maintenance of data communication networks; maintenance and repair of communications systems; installation, maintenance and repair of telephone and communication equipment; installation of apparatus for conditioning air; installation of air-conditioning systems; installation, maintenance and repair of cooling and air-conditioning systems for temperature-controlled environments; installation of air conditioning apparatus; installation of control systems for air conditioning; installation of apparatus for air conditioning; installation, maintenance and repair of air-conditioning systems; installation of air-conditioning apparatus; installation and repair of air-conditioning systems; installation of apparatus for air-conditioning; air conditioning apparatus installation; repair or maintenance of air-conditioning apparatus