installation, maintenance and repair of electrical equipment; installation of electrical apparatus for buildings; repair of electrical equipment; repair of electrical equipment and electrotechnical installations; installation, maintenance and repair of electrical and electronic apparatus and equipment; telecommunication wiring; 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; installation of electric light and power systems; installation, maintenance and repair of apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; repair and maintenance of electrical appliances; electric apparatus installation; services of electricians; wiring services for telecommunications; electric appliance installation and repair; telecommunication wiring services; installation of electrical wiring; electrical wiring services; electrical installation services; installation of electrical apparatus; providing information relating to the 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 apparatus for supplying electricity; electrical equipment repair; installation of electrical machinery and electricity generators; electric appliance installation; installation, maintenance and repair of electrical lighting apparatus; maintenance and repair of electrical apparatus; repair 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; installation of machinery for generating electricity