This class includes: the installation of electrical systems in all kinds of buildings and civil engineering structures. In specific: + electrical wiring and fittings; + telecommunications wiring; + computer network and cable television wiring, including fibre optic; + satellite dishes; + lighting systems; + fire alarms; + burglar alarm systems; + street lighting and electrical signals; + airport runway lighting; This class also includes: connecting of electric appliances and household equipment;
This class excludes: construction of communications and power transmission lines, see 42230 (Construction of telecommunications and communication constructions).