A conductor for grounding a direct-current system is the larger of the 51 largest conductor supplying the system; or No. 8 AWG (8.4mm² ). A conductor for grounding the neutral of an alternating-current system 52 46 CFR Table 111.05-31(b). NOTE Web link for 46 CFR Ch. I, Table 111.05-31(b): Each equipment-grounding conductor (other than a system-grounding conductor) of a cable must be permanently identified as a grounding 53 conductor in accordance with the requirements of the NEC Section 250.119. A permanently grounded conductor must not have an overcurrent 54 device unless the overcurrent device simultaneously opens each ungrounded conductor of the circuit. The neutral conductor of the emergency-main switchboard bus-tie must 55 not have a switch or circuit breaker. Number Item Y/N/NA Service loads mean electrical equipment for all auxiliary services necessary for maintaining the vessel in a normal, operational and NOTE habitable condition. Ship's service loads include, but are not limited to, all safety, lighting, ventilation, navigational, communications, habitability, and propulsion auxiliary loads. Vessel Power Supply Design and Operation 56 Each self-propelled vessel has at least two electric generating sources. The aggregate capacity of the electric vessel's service generating 57 sources is sufficient for the vessel's service Failure of any single generating set energy source such as a boiler, 58 diesel, gas turbine, or steam turbine does not cause all to be inoperable generating sets. If the emergency generator is used for part or all of the electric power necessary to start the main propulsion plant from a dead ship condition, the emergency generator is capable of providing power to all 59 emergency lighting, emergency internal communications systems, and fire detection and alarm systems in addition to the power utilized for starting the main propulsion plant. Each generator mover must have an overspeed device that is independent of the normal operating governor and adjusted so that the 60 speed cannot exceed the maximum rated speed by more than 15 percent.
51 A conductor for grounding a direct-current system is the larger of the largest conductor supplying the system; or No. 8 AWG (8.4mm² ). 52 A conductor for grounding the neutral of an alternating-current system 46 CFR Table 111.05-31(b). NOTE Web link for 46 CFR Ch. I, Table 111.05-31(b): 53 Each equipment-grounding conductor (other than a system-grounding conductor) of a cable must be permanently identified as a grounding conductor in accordance with the requirements of the NEC Section 250.119. 54 A permanently grounded conductor must not have an overcurrent device unless the overcurrent device simultaneously opens each ungrounded conductor of the circuit. 55 The neutral conductor of the emergency-main switchboard bus-tie must not have a switch or circuit breaker. Number Item Y/N/NA NOTE Service loads mean electrical equipment for all auxiliary services necessary for maintaining the vessel in a normal, operational and habitable condition. Ship's service loads include, but are not limited to, all safety, lighting, ventilation, navigational, communications, habitability, and propulsion auxiliary loads. Vessel Power Supply Design and Operation 56 Each self-propelled vessel has at least two electric generating sources. 57 The aggregate capacity of the electric vessel's service generating sources is sufficient for the vessel's service 58 Failure of any single generating set energy source such as a boiler, diesel, gas turbine, or steam turbine does not cause all to be inoperable generating sets. 59 If the emergency generator is used for part or all of the electric power necessary to start the main propulsion plant from a dead ship condition, the emergency generator is capable of providing power to all emergency lighting, emergency internal communications systems, and fire detection and alarm systems in addition to the power utilized for starting the main propulsion plant. 60 Each generator mover must have an overspeed device that is independent of the normal operating governor and adjusted so that the speed cannot exceed the maximum rated speed by more than 15 percent.
Wtrcrft_AppC2.docx