SAFETY OF LIFE AT SEA C5 1 



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

 load without recharging or excessive voltage drop. 



(d) (i) Where the emergency source of power is a generator there shaU be 

 provided a temporary source of emergency power consisting of an accumulator 

 battery of sufficient capacity : — 



(1) to supply emergency lighting continuously for half an hour; 



(2) to close the watertight doors (if electrically operated) but not 



necessarily to close them all simultaneously; 



(3) to operate the indicators (if electrically operated) which show whether 



power operated watertight doors are open or closed; and 



(4) to operate the sound signals (if electrically operated) which give 



warning that power operated watertight doors are about to close. 



The arrangements shall be such that the temporary source of emergency power 

 will come into operation automatically in the event of failure of the main 

 electrical supply. 



(ii) Where the emergency source of power is an accumulator battery, 

 arrangements shall be made to ensure that emergency lighting will auto- 

 matically come into operation in the event of failure of the main lighting 

 supply. 



(e) An indicator shall be mounted in the machinery space, preferably on 

 the main switchboard, to indicate when any accumulator battery fitted in 

 accordance with this Regulation is being discharged. 



(/) (i) The emergency switchboard shall be installed as near as is 

 practicable to the emergency source of power. 



(ii) Where the emergency source of power is a generator, the emer- 

 gency switchboard shall be located in the same space as the emergency source 

 of power, unless the operation of the emergency switchboard would thereby 

 be impaired. 



(iii) No accumulator battery fitted in accordance with this Regulation 

 shall be installed in the same space as the emergency switchboard. 



(iv) The Administration may permit the emergency switchboard to be 

 supplied from the main switchboard in normal operation. 



(g) 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. 



(/j) Provision shall be made for the periodic testing of the emergency 

 source of power and the temporary source of power, if provided, which shall 

 include the testing of automatic arrangements. 



Ch. 2 



