Electronic Code of Federal Regulations
|
e-CFR data is current as of January 15, 2021 |
Title 46 → Chapter I → Subchapter J → Part 111 → Subpart 111.51 |
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.51—Coordination of Overcurrent Protective Devices
Contents
§111.51-1 Purpose.
§111.51-3 Protection of vital equipment.
Back to Top§111.51-1 Purpose.
The purpose of this subpart is to provide continuity of service for equipment vital to the propulsion, control or safety of the vessel under short-circuit conditions through coordination and selective operation of overcurrent protective devices.
§111.51-3 Protection of vital equipment.
(a) The coordination of overcurrent protective devices must be demonstrated for all potential plant configurations.
(b) Overcurrent protective devices must be installed so that:
(1) A short-circuit on a circuit that is not vital to the propulsion, control, or safety of the vessel does not trip equipment that is vital; and
(2) A short-circuit on a circuit that is vital to the propulsion, control, or safety of the vessel is cleared only by the protective device that is closest to the point of the short-circuit.
[CGD 74-125A, 47 FR 15236, Apr. 8, 1982, as amended by CGD 94-108, 62 FR 23908, May 1, 1997]