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Legend: Explanations & Illustrations Rationale Note Figures & Tables Revision history

Clause 9.6 Operation Control Centre

9.6.1 Operation control centre (OCC)

a. Fire separation

The OCC shall have a fire separation of at least 2 hrs from other areas. It shall be provided with dedicated access/ exit from/ to the external via enclosures having a fire resistance of at least 2 hrs.

Note: The protected enclosure is not necessary if the access/ exit is direct from/ to the external.

b. Power supply

Equipment of OCC essential for the operation of trains and the tunnel ventilation system shall be provided with secondary power supply.

c. Ventilation

The OCC shall have the same ventilation requirements as the FCC.

d. Hotline

A hotline shall be provided between the OCC and SCDF Operations Centre.

e. Standby OCC

The above requirements of OCC shall apply to the standby OCC, where provided.

R Rationale - Clause 9.6.1e.

A standby OCC serves as a back-up should the main OCC cannot be used.