46 C.F.R. § 111.70-1 General.
Title 46 - Shipping
(a) Each motor circuit, controller, and protection must meet the requirements of ABS Rules for Building and Classing Steel Vessels, sections 4/5A5.13, 4/5B2.13, 4/5B2.15, and 4/5C4; ABS Rules for Building and Classing Mobile Offshore Drilling Units, sections 4/3.87 through 4/3.94 and 4/3.115.6; or IEC 92–301, as appropriate, except the following circuits: (1) Each steering gear motor circuit and protection must meet part 58, subpart 58.25, of this chapter. (2) Each propulsion motor circuit and protection must meet subpart 111.35 of this part. (b) In ungrounded three-phase alternating current systems, only two motor-running protective devices (overload coil or heater type relay within the motor and controller) need be used in any two ungrounded conductors, except when a wye-delta or a delta-wye transformer is used. (c) The motor disconnecting means must be an externally operable switch or circuit breaker. [CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as amended by CGD 94–108, 61 FR 28281, June 4, 1996; 62 FR 23909, May 1, 1997]
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.70—Motor Circuits, Controllers, and Protection
§ 111.70-1 General.
