37 Installation, fitting, renovation, repair and maintenance of buildings, pipelines, plumbing, central heating, heating installations, electric and electrical equipment and electrical installations; installation, fitting, renovation, repair and maintenance of apparatus and parts and fittings for buildings, pipelines, plumbing, central heating, heating installations, electric and electrical equipment and electrical installations; electric appliance installation and repair; installation, maintenance and repair of telephone networks, cable networks, business communication systems, computer networks and electric networks; maintenance and repair services in respect of electrical control apparatus; renovation, repair and maintenance of electrical wiring; repair services for domestic electrical appliances; repair, maintenance and installation of electric and electronic components; electrician services; rental of equipment for performing any of the aforesaid services; consultancy, advisory, enquiry and information services relating to these services