Installation of secondary power supply systems (electrical generators)
Setting of electric cables and appliances
Setting of telecommunication systems and computer installations
Setting of monitoring systems and alarms against housebreakings
Setting of lighting and signalling systems for roads, railroads, port and airport installations (including the setting of notice boards)
Setting of electrical installations of heating
Installation of signs, lighted or not
Installation of lifts and escalators
Test and analyses on texture, physical characteristics, performances, compliance with reglements and standards or specifications of materials, products, installations, etc.
Test or analyses in laboratories for testing the running, the ageing or the security of materials and installations
Measurements concerning clean air and water, measurement of radioactivity or similar phenomenons, analysis of the potential sources of pollution (smoke, sewage, etc.)
Creation and setting of advertisements: posters, advertising signs, lighting newspapers, lighting signs, display on buses, etc.
Maintenance and repair of computers and peripherical computer equipment
Maintenance and repair of account machines and other office machines
Repair of household appliances
Repair of electronic and optical equipment
Repair of electronic devices
Electro-technical installation works at buildings
Engineers and similar technical advisors, with the exception of surveyors
Other types of technical surveys and checks
Services with regard to security systems
Reparations of computers and peripheral devices
Repair of communication devices
Repair of domestic devices and of equipment used in house and in the garden
Electro-technical installation works, with the exception of those executed at buildings
Installation of heating, air-conditioning and ventilation