[Code of Federal Regulations]
[Title 46, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR111.52-3]

[Page 231]
 
                           TITLE 46--SHIPPING
 
    CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION (CONTINUED)
 
PART 111--ELECTRIC SYSTEMS--GENERAL REQUIREMENTS--Table of Contents
 
          Subpart 111.52--Calculation of Short-Circuit Currents
 
Sec. 111.52-3  Systems below 1500 kilowatts.

    The following short-circuit assumptions must be made for a system 
with an aggregate generating capacity below 1500 kilowatts, unless 
detailed computations in accordance with Sec. 111.52-5 are submitted:
    (a) The maximum short-circuit current of a direct current system 
must be assumed to be 10 times the aggregate normal rated generator 
currents plus six times the aggregate normal rated currents of all 
motors that may be in operation.
    (b) The maximum asymmetrical short-circuit current for an 
alternating current system must be assumed to be 10 times the aggregate 
normal rated generator currents plus four times the aggregate normal 
rated currents of all motors that may be in operation.
    (c) The average asymmetrical short-circuit current for an 
alternating-current system must be assumed to be 8\1/2\ times the 
aggregate normal rated generator currents plus 3\1/2\ times the 
aggregate normal rated currents of all motors that may be in operation.

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