MIL-STD-1310H(NAVY) APPENDIX C
C.3.5 Electronic transmitter ground cable. A number 0000 AWG cable shall be connected to the main ground connection point and shall run as directly as possible to the radio transmitter space(s).
a. Each radio transmitter cabinet or enclosure shall be connected to this ground cable by a number 1 AWG
cable.
b. Copper lugs or connectors, corresponding to cable size, shall be used on each end of this cable.
C.3.6 Antenna tuners and couplers, ground cable. Each HF antenna coupler shall normally be grounded by a dedicated number 1/0 AWG ground cable, run as directly as possible between each coupler and the main ground connection point.
a. Each HF coupler ground cable may be connected to the electronic transmitter ground cable, in lieu of the main ground connection point.
b. Other couplers and tuners located on metal masts or structures connected to the ground system shall be
Class B bonded to the mast or structure.
c. Where couplers and tuners are mounted on nonmetallic masts or structures, a number 10 AWG ground system cable shall be provided.
d. To minimize effect of ground loops, RF transmission lines shall be routed with the tuner/coupler ground cables.
C.3.7 Lightning protection. A separate 0000 AWG cable connected to the main ground connection point shall be installed for lightning protection. This cable shall be routed in as straight a line as possible and shall be continuous and unspliced from the highest conductive surface to the main ground connection point.
C.3.8 Metal mast. Where a metal mast is used, it shall be connected to the ground plates using a size 0000
AWG cable. Equipment on the mast that requires grounding shall be grounded to the mast (see C.3.4.e).
C.4 EQUIPMENT/ITEMS GROUNDING REQUIREMENTS
C.4.1 Equipment/items that shall be grounded. The following equipment and items shall be connected to the ground system:
a. Equipment utilizing electrical power and any associated cabinets and interconnection boxes. b. Fuel tanks, water tanks, and associated piping.
c. Metallic standing rigging.
d. Metallic cranes, hoisting gear, king posts, and masts.
e. Any metallic structure used for towing of, or in contact with, magnetic minesweeping cables, such as deck chocks, deck wearing plates, deck padeyes, and stern collar chocks.
f. Portable metallic liferails and ladderways. g. Shielded rooms.
h. Engines, steering vanes, bow thruster controls, rudder stock, struts, main shaft (engine or reduction gear mount), main shaft fairing (if not grounded internally) sonar trunks, and metallic underwater appendages.
C.4.2 Items that should not require grounding. The following items should not require grounding:
a. Berths and desks.
b. Bitts and chocks (if not used with minesweeping operations).
c. Small metal objects, such as metal parts of air ports, hand tools (if not electrically operated), and other objects of comparable size.
d. Ventilators and ducting.
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