C50 SAFETY OF LIFE AT SEA 



Regulation 24 



Main Source of Electrical Power in Passenger Ships 



(a) Every passenger ship, the electrical power of which constitutes the 

 only means of maintaining the auxiliary services indispensable for the 

 propulsion and the safety of the ship, shall be provided with at least two main 

 generating sets. The power of these sets shall be such that it shall still be 

 possible to ensure the functioning of the services referred to in sub- 

 paragraph (a) (i) of Regulation 23 of this Chapter in the event of any one of 

 these generating sets being stopped. 



(b) In a passenger ship where there is only one main generating station, 

 the main switchboard shall be located in the same main fire zone. Where 

 there is more than one main generating station, it is permissible to have only 

 one main switchboard. 



Regulation 25 



Emergency Source of Electrical Power in Passenger Ships 



{a) There shall be above the bulkhead deck and outside the machinery 

 casings a self-contained emergency source of electrical power. Its location 

 in relation to the main source or sources of electrical power shall be such as 

 to ensure to the satisfaction of the Administration that a fire or other casualty 

 to the machinery space as defined in paragraph (h) of Regulation 2 of this 

 Chapter will not interfere with the supply or distribution of emergency power. 

 It shall not be forward of the collision bulkhead. 



(b) The power available shall be sufficient to supply all those services 

 that are, in the opinion of the Administration, necessary for the safety of the 

 passengers and the crew in an emergency, due regard being paid to such 

 services as may have to be operated simultaneously. Special consideration 

 shall be given to emergency lighting at every boat station. on deck and 

 oversides, in all alleyways, stairways and exits, in the machinery spaces and 

 in the control stations as denned in paragraph (/) of Regulation 35 of this 

 Chapter, to the sprinkler pump, to navigation lights, and to the daylight 

 signalling lamp if operated from the main source of power. The power shall 

 be adequate for a period of 36 hours, except that, in the case of ships engaged 

 regularly on voyages of short duration, the Administration may accept a 

 lesser supply if satisfied that the same standard of safety would be attained. 



(c) The emergency source of power may be either: — 

 (i) a generator driven by a suitable prime-mover with an independent 

 fuel supply and with approved starting arrangements; the fuel used 

 shall have a flash point of not less than 110°F. (or 43°C.); or 



Ch. 2 



Ex. Doc. K. 87-1 O" fi 



