[Code of Federal Regulations]

[Title 46, Volume 4]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 46CFR111.10-4]



[Page 217]

 

                            TITLE 46_SHIPPING



                  (This book contains parts 90 to 139)

 

   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)

 

PART 111_ELECTRIC SYSTEMS_GENERAL REQUIREMENTS--Table of Contents

 

                       Subpart 111.10_Power Supply

 

Sec.  111.10-4  Power requirements, generating sources.



    (a) The aggregate capacity of the electric ship's service generating 

sources required in Sec.  111.10-3 must be sufficient for the ship's 

service loads.

    (b) With the ship's service generating source of the largest 

capacity stopped, the combined capacity of the remaining electric ship's 

service generating source or sources must be sufficient to supply those 

services necessary to provide normal operational conditions of 

propulsion and safety, and minimum comfortable conditions of 

habitability. Habitability services include cooking, heating, air 

conditioning (where installed), domestic refrigeration, mechanical 

ventilation, sanitation, and fresh water.

    (c) The capacity of the ship's service generating sources must be 

sufficient for supplying the ship's service loads without the use of a 

generating source which is dependent upon the speed or direction of the 

main propelling engines or shafting.

    (d) Operating generators must provide a continuous and uninterrupted 

source of power for the ship's service load under normal operational 

conditions. Any vessel speed change or throttle movement must not cause 

a ship's service load power interruption.

    (e) Vessels with electric propulsion that have two or more constant-

voltage generators which supply both ship's service and propulsion power 

do not need additional ship's service generators provided that with any 

one propulsion/ship's service generator out of service the capacity of 

the remaining generator(s) is sufficient for the electrical loads 

necessary to provide normal operational conditions of propulsion and 

safety, and minimum comfortable conditions of habitability.

    (f) A generator driven by a main propulsion unit (such as a shaft 

generator) which is capable of providing electrical power continuously, 

regardless of the speed and direction of the propulsion shaft, may be 

considered one of the ship's service generating sets required by Sec.  

111.10-3. A main-engine-dependent generator which is not capable of 

providing continuous electrical power may be utilized as a supplemental 

generator provided that a required ship's service generator or 

generators having sufficient capacity to supply the ship's service loads 

can be automatically brought on line prior to the main-engine-dependent 

generator tripping off-line due to a change in the speed or direction of 

the main propulsion unit.



[CGD 94-108, 61 FR 28277, June 4, 1996; 61 FR 36787, July 12, 1996]