electrical wiring services; installation of electrical apparatus; repair of electrical appliances; electrical apparatus installation; electrical apparatus repair; electrical installation services; maintenance and repair of electrical apparatus; installation of audio electrical apparatus; electric appliance installation; residential, commercial and industrial installation and repair of electrical and computer wiring and cabling; interference suppression in electrical apparatus; electric appliance installation and repair; electric appliance repair; maintenance, installation and repair of electrical items and equipment; heating equipment installation; electrical engineering services (construction); installation of electricity generators; heating equipment installation and repair; construction; installation and repair of telecommunication apparatus; maintenance and repair of electronic installations; fire alarm installation and repair; repair of electronic apparatus; maintenance and repair of electronic apparatus