Hong Kong Regulations

ROAD TRAFFIC (CONSTRUCTION AND MAINTENANCE OF VEHICLES) REGULATIONS - REGULATION 64

Electrical equipment

(1) All electrical apparatus and circuits in every bus and light bus shall be
so constructed and installed as to guard adequately against the risk of
electric shock and the outbreak of fire.

(2) Subject to paragraph (3), where the voltage exceeds 100 volts in one or
more electrical circuits in a bus or light bus, a manually operated isolating
switch which is capable of disconnecting all such circuits from the main
electrical supply shall be connected in each pole of that supply which is not
electrically connected to earth, and shall be located inside the bus or light
bus in a position readily accessible to the driver or conductor.

(3) No isolating switch fitted under paragraph (2) shall be capable of
disconnecting any electrical circuit supplying the lamps required to be
carried under Part VII of these regulations.

(4) In this regulation any reference to an electrical circuit is a reference
to an electrical circuit not being a high tension ignition circuit or a
circuit within a unit of equipment.