This Class Includes :
4321.01 — Installation of:
• 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
4321.02 — Connecting of electric appliances and household equipment, including baseboard heating

This Class Includes :
4322.01 — Installation in buildings or other construction projects of:
• Heating systems (electric, gas and oil)
• Furnaces, cooling towers
• Non-electric solar energy collectors
• Plumbing and sanitary equipment
• Ventilation, refrigeration or air-conditioning equipment and ducts
• Gas fittings
• Steam piping
• Fire sprinkler systems
• Lawn sprinkler systems
4322.02 — Duct work installation

This Class Includes :
4329.01 — Installation in buildings or other construction projects of:
• Elevators, escalators
• Automated and revolving doors
• Lightning conductors
• Vacuum cleaning systems
• Thermal, sound or vibration insulation