C52 SAFETY OF LIFE AT SEA 



Regulation 26 



Emeriiency Source of Electrical Power in Cargo Ships 

 (a) Cargo ships of 5,000 Tons Gross Tonnage and upwards 



(i) In cargo ships of 5,000 tons gross tonnage and upwards there shall 

 be a self-contained emergency source of power, located to the satisfaction of 

 the Administration above the uppermost continuous deck and outside the 

 machinery casings, to ensure its functioning in the event of fire or other 

 casualty causing failure to the main electrical installation. 



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

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

 all on board in an emergency, due regard being paid to such services as may 

 have to be operated simultaneously. Special consideration shall be given to : — 



(1) emergency lighting at every boat station on deck and oversides, in all 



alleyways, stairways and exits, in the main machinery space and 

 main generating set space, on the navigating bridge and in the 

 chartroom; 



(2) the general alarm; and 



(3) navigation lights if solely electric, and the daylight signalling lamp 



if operated by the main source of electrical power. 



The power shall be adequate for a period of 6 hours, 

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



(1) an accumulator (storage) battery capable of carrying the emergency 



load without recharging or excessive voltage drop; or 



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



fuel supply and with starting arrangements to the satisfaction of 

 the Administration. The fuel used shall have a flash point of not 

 less than HOT. (or 43 °C.). 



(iv) Arrangements shall be such that the complete emergency installation 

 will function when the ship is inclined 22^ degrees and /or when the trim of 

 the ship is 10 degrees. 



(v) Provision shall be made for the periodic testing of the complete 

 emergency installation. 



(b) Cargo ships of less than 5,000 Tons Gross Tonnage 



(i) In cargo ships of less than 5,0(X) tons gross tonnage there shall be a 

 self-contained emergency source of power located to the satisfaction of the 

 Administration, and capable of supplying the illumination at launching 

 stations and stowage positions of survival craft prescribed in sub-paragraphs 



Ch. 2 



