[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR183.320]

[Page 289]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 183--ELECTRICAL INSTALLATION--Table of Contents
 
            Subpart C--Power Sources and Distribution Systems
 
Sec. 183.320  Generators and motors.

    (a) Each generator and motor must be:
    (1) In a location that is accessible, adequately ventilated, and as 
dry as practicable; and
    (2) Mounted above the bilges to avoid damage by splash and to avoid 
contact with low lying vapors.
    (b) Each generator and motor must be designed for an ambient 
temperature of 50[deg] C (122[deg] F) except that:
    (1) If the ambient temperature in the space where a generator or 
motor will be located will not exceed 40[deg] C (104[deg] F) under 
normal operating conditions, the generator or motor may be designed for 
an ambient temperature of 40[deg] C (104[deg] F); and
    (2) A generator or motor designed for 40[deg] C (104[deg] F) may be 
used in 50[deg] C (122[deg] F) ambient locations provided the generator 
or motor is derated to 80 percent of the full load rating, and the 
rating or setting of the overcurrent devices is reduced accordingly.
    (c) A voltmeter and an ammeter, which can be used for measuring 
voltage and current of a generator that is in operation, must be 
provided for a generator rated at 50 volts or more. For each alternating 
current generator, a means for measuring frequency must also be 
provided.
    (d) Each generator must have a nameplate attached to it containing 
the information required by Article 445 of the National Electric Code 
(NEC) (National Fire Protection Association (NFPA) 70), and for a 
generator derated in accordance with paragraph (b)(2) of this section, 
the derated capacity.
    (e) Each motor must have a nameplate attached to it containing the 
information required by Article 430 of the NEC (NFPA 70), and for a 
motor derated in accordance with paragraph (b)(2) of this section, the 
derated capacity.
    (f) Each generator must be protected by an overcurrent device set 
value not exceeding 115 percent of the generator full load rating.