§ 112.43-7 Wheelhouse distribution panel. (a) Except as allowed in paragraph (b) of this section, the following emergency lights must be supplied from a distribution panel in the wheelhouse:

(1) Navigation lights not supplied by the navigation light indicator panel.

(2) Floodlights for lifeboat and liferaft launching operations, except as allowed in § 112.43-5 of this part. (3) Signaling lights.

(4) Emergency lights: (i) On open decks;

(ii) In the wheelhouse;

(iii) In the chartroom; and
(iv) In the fire control room.

(b) On a mobile offshore drilling unit, the distribution panels required in paragraph (a) must be in the control room.

(c) Each distribution panel required in paragraphs (a) and (b) of this section must have a fused switch or circuit breaker for each branch circuit.

§ 112.43-9 Signaling lights.

Each signaling light must be supplied by a branch circuit that supplies no other equipment.

§ 112.43-11 Illumination for launching operations.

Branch circuits for floodlights for lifeboat and liferaft launching operations must:

(a) Supply no other equipment; and (b) Be arranged so that floodlights for adjacent lifeboats and liferafts are supplied from different branch circuits.

§ 112.43-13 Navigation light indicator panel supply.

Each navigation light indicator panel must be supplied:

(a) Directly from the emergency switchboard; or

(b) Be a through feed, without switch or overcurrent protection, from the feeder supply the wheelhouse emergency lighting panel.

§ 112.43-15 Emergency lighting feeders.

For a vessel with firescreen bulkheads forming fire zones, at least one emergency lighting feeder must supply only the emergency lights between two adjacent main vertical fire zone bulkheads. The emergency light

(a) The prime mover of a generator set must have:

(1) All accessories necessary for operation and protection of the prime mover; and

(2) A self-contained cooling system of a size that ensures continuous operation with 100 degrees F (37 degrees C) air.

(b) The fuel used must have a flashpoint of not less than 110 degrees F (43 degrees C).

(c) The room that has the generator set must have intake and exhaust ducts to supply adequate cooling air.

(d) The prime mover must not have a starting aid, except that a thermostatically controlled electric water jacket heater connected to the final emergency bus is permitted.

(e) The generator set must be capable of carrying its full rated load within 20 seconds after cranking is

started with the intake air, room ambient temperature, and starting equipment at 32 degrees F (0 degrees C).

(f) The generator set must start by hydraulic, compressed air, or electrical means.

(g) The generator set must lubricate and operate when inclined to the angles specified § 112.05-5(c), and must be arranged so that it does not spill oil under a vessel roll of 30 degrees each side of the vertical.

(h) The generator set must shut down automatically upon loss of lubricating oil pressure, overspeed, or operation of a fixed fire extinguishing system in the emergency generator room (see § 111.12-1(b) for detailed overspeed trip requirements).

(i) If the prime mover is a diesel engine, there must be an audible alarm that sounds on low oil pressure and high cooling water temperature.

(j) If the prime mover is a gas turbine, it must meet the shutdown and alarm requirements in § 58.10-15(g) of this chapter.

(k) An independent fuel supply must be provided for the prime mover.

§ 112.50-3 Hydraulic starting.

A hydraulic starting system must meet the following:

(a) The hydraulic starting system must be a self-contained system that provides the cranking torque and engine starting RPM recommended by the engine manufacturer.

(b) The stored hydraulic pressure must be automatically maintained within the predetermined pressure limits.

(c) The means of automatically maintaining the hydraulic system within the predetermined pressure limits must be electrically energized from the final emergency bus.

(d) There must be a means to manually recharge the hydraulic system.

(e) Charging of the hydraulic starting system must not cause insufficient hydraulic pressure for engine starting.

(f) The hydraulic starting system must have capacity for at least six cranking cycles including the reserve capacity under paragraph (g) of this section.

(g) Capacity for three of the cranking cycles under paragraph (f) of this

section must be held in reserve. The system must be arranged so that the operation of one control by one person isolates the discharged or initially used part of the system and allows the reserve capacity to be used.

§ 112.50-5 Electric starting.

An electric starting system must meet the following:

(a) The starting battery must have sufficient capacity for at least six cranking cycles. Each cycle must inIclude at least one-half minute of battery rest.

(b) At the end of the sixth cranking cycle the battery voltage, while cranking the engine, must be at least 50 percent of nominal battery voltage.

(c) Capacity for three of the cranking cycles under paragraph (a) of this section must be held in reserve. The system must be arranged so that the operation of one control by one person allows the reserve capacity to be used.

§ 112.50-7 Compressed air starting.

A compressed air starting system must meet the following:

(a) The starting, charging, and energy storing devices must be in the emergency generator room, except for the main or auxiliary air compressors addressed in paragraph (c)(3)(i) of this section.

(b) The compressed air starting system must provide the cranking torque and engine starting RPM recommended by the engine manufactur

er.

(c) The compressed air starting system must have an air receiver that meets the following:

(1) Has capacity for at least six cranking cycles;

(2) supplies no other system; and (3) is supplied from one of the following:

(i) The main or auxiliary compressed air receivers with a nonreturn valve in the emergency generator room and a handcranked, diesel-powered air compressor for recharging the air receiver.

(ii) An electrically driven air compressor that is automatically operated and is powered from the emergency power source. If this compressor supplies other auxiliaries, there must be a

§ 112.55-10 Storage battery charging.

(a) Each storage battery installation for emergency lighting and power, and starting batteries for an emergency diesel or gas turbine driven generator set, must have apparatus to automatically maintain the battery fully charged.

(b) When the ship's service generating plant is available, the battery must have a continuous trickle charge, except that after discharge the battery must be charged automatically at a higher rate.

(c) Charging operations must not cause an absence of battery power.

(d) There must be instruments to show the rate of charge.

§ 112.55-15 Capacity of storage batteries.

(a) A storage battery for an emergency lighting and power system must have capacity:

(1) To close all watertight doors three times;

(2) To open all watertight doors two times; and

Distribution of cable runs.

113.50-25 Equipment enclosures.

Sec.

Subpart 113.30-Sound-Powered Telephone

and Voice Tube Systems

113.30-1 Applicability.

113.30-3 Means of communications.

113.30-5 Requirements.

Sec.

113.50-20

Subpart 113.65—Whistle Operations

113.65-5 General requirements.

Subpart 113.70-Smoke Detector Systems 113.70-5 General requirements.

AUTHORITY: 46 U.S.C. 170, 367, 369, 375, 390b, 391a, 392, 405, 416, 445, 489, 526p, 49, U.S.C. 1655(b); 49 CFR 1.46.

SOURCE: CGD 74-125A, 47 FR 15272, Apr. 8, 1982, unless otherwise noted.

Subpart 113.05-General Provisions § 113.05-5 Approved equipment.

If approved equipment is required in this part, that equipment must be specifically approved by the Commandant.

NOTE: Many specifications for equipment that must be approved are in Subchapter Q for this chapter.

§ 113.10-9 Power supply.

(a) General. There must be at least two sources of power for the electrical equipment of each fire detecting and alarm system. The normal source must be the main power source. The other source must be the emergency power source or an automatically charged battery. Upon loss of power to the system from the normal source, the system must be automatically supplied from the other source.

(b) Batteries. Each battery used in a fire detecting and alarm system must meet Subpart 111.15 of this chapter.

(c) Capacity of storage battery. The capacity of each system's storage battery must be sufficient to supply the fire detecting and alarm system for a period of not less than one week without recharging. At the end of the oneweek discharge period, the battery potential must not be less than 80 percent of nominal potential under design load.

(d) Capacity of power supply branch circuit. The capacity of each branch circuit providing power to a fire detection or alarm system must not be less than 125 percent of the maximum load.

Subpart 113.20-Automatic Sprinkler Systems

§ 113.20-1 Sprinkler alarm system.

Each sprinkler alarm system, including annunciator, power supply, alarm switches, and bells, must meet Subpart 76.25 of this chapter.

§ 113.20-3 Watertight equipment.

Each connection box and each switch in an automatic sprinkler system must be watertight.

Subpart 113.25-General Alarm Systems

§ 113.25-1 Applicability.

(a) This subpart, except §§ 113.25-25 and 113.25-30, applies to each manned vessel of over 100 gross tons, except barges, scows, and similar vessels.

(b) Section 113.25-25 applies to each manned ocean and coastwise barge of over 100 gross tons if the crew is divid

ed into watches for the purpose of steering.

(c) Section 113.25-30 applies to each barge of 300 or more gross tons that has sleeping accommodations for more than six persons.

§ 113.25-3 Requirements.

Each vessel must have a general alarm system that meets the requirements of this subpart.

§ 113.25-5

Location of contact makers.

(a) Passenger vessels and cargo and miscellaneous vessels. Each passenger vessel, cargo vessel, and miscellaneous vessel must have a manually operated contact maker for the general alarm system:

(1) In the wheelhouse; and

(2) At the feeder distribution panel if the general alarm power supply is not in or next to the wheelhouse.

(b) Tank vessels. Each tank vessel must have a manually operated contact maker for the general alarm system:

(1) In the wheelhouse;

(2) At the deck officers' quarters farthest from the engineroom;

(3) in the engineroom;

(4) At the location of the emergency means of stopping cargo transfer required under 33 CFR 155.780; and

(5) At the feeder distribution panel if the general alarm power supply is not in or next to the wheelhouse.

(c) Mobile offshore drilling units. Each mobile offshore drilling unit must have a manually operated contact maker for the general alarm system:

(1) In the main control room; (2) At the drilling console;

(3) At the feeder distribution panel; (4) In the wheelhouse, if a wheelhouse is installed; and

(5) In a routinely occupied space that is as far as practicable from all

other contact makers.

(d) Additional contact maker. A vessel must not have more than one other contact maker that operates the general alarm system in addition to those required under paragraph (a), (b), or (c) of this section unless the installation of other contact makers has been accepted by the Commandant.