C.F.R. » Title 46 » CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY › SUBCHAPTER J—ELECTRICAL ENGINEERING › PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS › Subpart 111.25—Motors

46 C.F.R. § 111.25-15

Duty cycle

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Each motor must be rated for continuous duty, except a motor for an application listed in Table 111.25-15 or a similar duty must meet the minimum short-time rating stated in the table.

Table 111.25-15

Application of motorMinimum short-time rating of motor, in hours
Deck winch and direct acting capstanHalf.
Deck winch with hydraulic transmissionContinuous at no load followed by 1⁄2 hr. at full load.
Direct acting windlassOne fourth.
Windlass with hydraulic transmissionHalf hour idle pump operation, followed by 1⁄4 hr. full load operation.
Steering gear, direct actingOne.
Steering gear, indirect driveContinuous operation at 15 pct. load followed by 1 hr. at full load.
Watertight door operators1⁄12.
Boat winches1⁄12.