Communications installation, repair, alteration and maintenance services; data cabling installation, data cabling services and maintenance services; electrical apparatus installation; electrical apparatus repair; electrical contracting; electrical engineering services (construction); electrical installation, repair, alteration and maintenance services; electrical services; electrical wiring services; maintenance and repair of electrical apparatus; fire alarm installation; fire alarm installation and repair; maintenance, installation and repair of electrical items and equipment; installation of electrical, data and audio visual cabling in residential, commercial and industrial premises; installation of electricity generators; installation of fire alarm systems; installation of communications network apparatus; installation of communications network instruments; installing of electronic communications networks; installation and repair of telecommunication apparatus; installation of telecommunications apparatus; installing of telecommunications networks; installation of security systems; maintenance and service of security alarms; interference suppression in electrical apparatus; maintenance and repair of communications systems; maintenance and repair of data communications networks; maintenance of data communication networks; maintenance and repair of telecommunications apparatus; residential, commercial and industrial electrical installation, repair, alteration and maintenance services; repair of electrical appliances; residential, commercial and industrial installation and repair of electrical and computer wiring and cabling; services of electrician