Mechanical and electrical fit out
The Mechanical and Electrical Team is installing lighting, fire deluge systems (high flow fire sprinklers), CCTV cameras, cable trays, jet fans and other tunnel systems. Most equipment is placed in the cross passages and in the tunnel roof.
Lighting – we are installing LED lights every 12 meters inside the tunnel. They are mounted on cable trays, which are installed in the tunnel roof.
Fire deluge systems – about 120 metres of fire deluge system is installed every week. This involves the team installing high flow fire sprinklers into the tunnel.
CCTV Camera installation – we are installing more than 700 CCTV cameras in the tunnel which will be used to monitor conditions inside the tunnel once it opens to traffic. Footage will be viewed from the Motorway Control Centre.
Cable tray installation – we will install more than 30 kilometres of cable trays inside the tunnel. To do this, we fix prefabricated brackets into their final position and lock them into place in the tunnel roof. Cable trays are used to support insulated electrical cables for power distribution, control, and communication.
Jet fans – 140 jet fans are being installed in the tunnel. We do this by mounting jet fans to a cradle in the tunnel roof and bolting the fans into place. A safety chain is then fitted on the fan for additional security.
Once equipment is installed, commissioning works must be completed. You can read more about the commissioning process here.