Power supply for ventilation system and associated control system (anemometers, opacimeters and gas sensors).
Power supply for fire detection and extinguishing system (detecting fires in tunnel, alarm control centre, fire extinguishers, hydrant network, pumping system and water supply).
Power supply for communications, signage, safety, security and control systems (radiating cable, public address system, SOS posts, variable information panels, cross-arrow systems, etc.).
Ancillary electrical installations in connecting galleries.
Ancillary electrical installations in technical rooms and control building.
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