[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: 46CFR111.70-3]



[Page 235]

 

                            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 111.70_Motor Circuits, Controllers, and Protection

 

Sec.  111.70-3  Motor controllers and motor control centers.



    (a) General. The enclosure for each motor controller or motor 

control center must meet NEMA No. ICS 2 and NEMA No. 2.3 1983 or meet 

Table 5 of IEC 92-201, as appropriate, for the location where it is 

installed. In addition, each enclosure in a hazardous location must meet 

subpart 111.105 of this part. NEMA No. 2.4 provides guidance on the 

differences between NEMA and IEC devices for motor service.

    (b) Low-voltage release. Each motor controller for a fire pump, 

elevator, steering gear, or auxiliary that is vital to the vessel's 

propulsion system, except a motor controller for a vital propulsion 

auxiliary which can be restarted from a central control station, must 

have low-voltage release if automatic restart after a voltage failure or 

its resumption to operation is not hazardous. If automatic restart is 

hazardous, the motor controller must have low-voltage protection. Motor 

controllers for other motors must not have low-voltage release unless 

the starting current and the short-time sustained current of the 

additional low-voltage release load is within the capacity of one ship's 

service generator. Automatic sequential starting of low-voltage release 

controllers is acceptable to meet this paragraph.

    (c) Low-voltage protection. Each motor controller must have low-

voltage protection, except for the following motor controllers:

    (1) A motor controller that has low-voltage release under paragraph 

(b) of this section.

    (2) A motor controller for a motor of less than 2 horsepower (1.5 

kW).

    (d) Identification of controllers. (1) Each motor controller and 

motor control center must be marked externally with the following 

information:

    (i) Manufacturer's name or identification.

    (ii) Voltage.

    (iii) Number of phases.

    (iv) Current.

    (v) kW (Horsepower).

    (vi) Identification of motor being controlled.

    (vii) Current rating of trip setting.

    (2) Each controller must be provided with heat durable and permanent 

elementary wiring/schematic diagrams of the controller located on the 

door interior.



[CGD 94-108, 61 FR 28281, June 4, 1996; 61 FR 33045, June 26, 1996]