Medium voltages meet either section 8.4 of IEEE 45 or IEC 119 Electrical Installations in Ships, Part 503. Non-conducting deck coverings, such as non-conducting mats or gratings, suitable for the specific switchboard voltage are installed for personnel protection at the front and rear of the switchboard and extend 120 the entire length of, and be of sufficient width to suit the operating space. Each switchboard device has a nameplate showing its function. 121 Each nameplate for a circuit breaker shows the electrical load served 122 and the setting of the circuit breaker. Each circuit that supplies a device on a switchboard has overcurrent 123 protection except as indicated in the four below: A circuit that supplies a device on a switchboard does not have 124 overload protection if it supplies an electric propulsion control. A circuit that supplies a device on a switchboard does not have 125 overload protection if it supplies a voltage regulator. A circuit that supplies a device on a switchboard does not have overload protection if it supplies a ship's service generator circuit 126 breaker tripping control. A circuit that supplies a device on a switchboard does not have overload protection if the device creates a hazard to the vessel if 127 de-energized. If circuit protection is used in any of the circuits, it is set at not less 128 than 500% of the expected current. A secondary circuit of a current transformer is not be fused, and the circuit from a current transformer to a device that is not in the 129 switchboard has a high voltage protector to short the transformer during an open circuit. Each bus meets the requirements of section 7.10 of IEEE 45; or (clause 7), IEC 60092-302: Low Voltage Switchgear and Control Gear 130 Assemblies. The most recent edition of IEEE 45 should be consulted for NOTE requirements. Instrumentation and control wiring is suitable for installation within in a 131 switchboard enclosure and be rated at 90 °C or higher. Number Item Y/N/NA
119 Medium voltages meet either section 8.4 of IEEE 45 or IEC Electrical Installations in Ships, Part 503. 120 Non-conducting deck coverings, such as non-conducting mats or gratings, suitable for the specific switchboard voltage are installed for personnel protection at the front and rear of the switchboard and extend the entire length of, and be of sufficient width to suit the operating space. 121 Each switchboard device has a nameplate showing its function. 122 Each nameplate for a circuit breaker shows the electrical load served and the setting of the circuit breaker. 123 Each circuit that supplies a device on a switchboard has overcurrent protection except as indicated in the four below: 124 A circuit that supplies a device on a switchboard does not have overload protection if it supplies an electric propulsion control. 125 A circuit that supplies a device on a switchboard does not have overload protection if it supplies a voltage regulator. 126 A circuit that supplies a device on a switchboard does not have overload protection if it supplies a ship's service generator circuit breaker tripping control. 127 A circuit that supplies a device on a switchboard does not have overload protection if the device creates a hazard to the vessel if de-energized. 128 If circuit protection is used in any of the circuits, it is set at not less than 500% of the expected current. 129 A secondary circuit of a current transformer is not be fused, and the circuit from a current transformer to a device that is not in the switchboard has a high voltage protector to short the transformer during an open circuit. 130 Each bus meets the requirements of section 7.10 of IEEE 45; or (clause 7), IEC 60092-302: Low Voltage Switchgear and Control Gear Assemblies. NOTE The most recent edition of IEEE 45 should be consulted for requirements. 131 Instrumentation and control wiring is suitable for installation within in a switchboard enclosure and be rated at 90 °C or higher. Number Item Y/N/NA