Main source of electrical power

(1) A main source of electrical power of sufficient capacity to supply all those services referred to in regulation 47(1)(a) shall be provided. This main source of electrical power shall consist of a generator driven by an internal combustion engine, which may be the main propulsion machinery of a ship in the case of a ship propelled by mechanical means. (2) A main electrical lighting system which shall provide illumination throughout those parts of the ship normally accessible to, and used by, crew or persons on board shall be supplied from the main source of electrical power. (3) The arrangement of the main electric lighting system shall be such that a fire or other casualty in spaces containing the main source of electrical power, associated transforming equipment and main switchboard will not render the emergency electric lighting system required by this section inoperative. (4) The arrangement of the emergency electric system shall be such that a fire or other casualty in spaces containing the emergency source of electrical power, associated transforming Merchant Ships (Registration) 152 equipment and emergency switchboard will not render the main electrical lighting system required by this section inoperative.