MIL-HDBK-1025/10
9.6.2 Medium-Voltage (4,160-Volt) Power Cable Specification. Cable will be three-
conductor, 8000-volt with an overall ethylene propylene jacket designed for continuous flexing
service and operation in severe environments. Cable should be similar to SHD-GC commercial
mining cable without the ground or ground-check conductors. Comply with NEMA WC-8
(ICEA S-68-516), Ethylene-Propylene-Rubber-Insulated Cable for the Transmission and
Distribution of Electrical Energy. Cable will be rated for at least 360 amperes.
Power Cable-in-Use Insulation Resistance Values
9.6.3
WARNING
The insulation resistance of each cable should be tested before each use.
9.6.3.1 Shore Criteria for Cable Assemblies. Cables having insulation readings below
1 megohm for 480-volt service cables and 5 megohms for 4,160-volt service cables will not be
placed in service. Shop testing and repair will be initiated for cable not meeting these
requirements.
9.6.3.2 Ship Criteria for 480-Volt Power Cable. Ship's service voltage is a 480-volt
system using 600-volt cable. Insulation resistance should not be less than 280 megohms per meter
(920 megohms per foot) in warm ambient temperature or 1,676 megohms per meter (5,500
megohms per foot) in cold ambient temperature. A warm ambient temperature is defined as a
climate or a condition in which the entire cable is in a heated space and not in contact with the
ship's hull. A cold ambient temperature is defined as a cold climate or a condition in which most
of the cable is in an unheated space or in contact with the ship's hull.
9.6.3.3 Explanation of Criteria Differences. The shore criteria is based on a cable
assembly of 38 meters (125 feet) plus or minus 7.6 meters (25 feet).
9.6.4 Low-Voltage Receptacles, Plugs, and Protective Circuit Breakers. The
system provides a 480-volt, three-phase, three-wire, ungrounded 60-hertz source to the ship.
9.6.4.1 Shipboard Connections. Generally use a MIL-C-24368 "Connector Assemblies,
Plug Assembly, Power Transfers, Shore-to-Ship and Ship-to-Ship," type 1 connector (plug) in
accordance with DOD-STD-1399, "Interface Standard for Shipboard Systems, Section 300,
Electrical Power Alternating Current," Figure E15 except as follows.
a. Portable shore power cable jumper supplied by the ship where piers do not have
MIL-C-24368, Type 2 receptacle and plug assemblies or
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