E E
5 5 ELECTRICAL
3
5 5
E E
2
E E HF ANTENNAS
5 5 ELECTRONIC
MAST
3
5 5
HF COUPLER
E E
COMMUNICATION
2
EXTERIOR DECK
CENTER T 4
T 4
2
2
2
MAIN GEN SETS
G
2
EMERG GEN SETS
E - EQUIPMENT
T - TRANSMITTER
LOCAL GROUND CONNECTION PLATE CONSTRUCTED AS SHOWN
ON FIGURE C-2
2 LEVEL SHIELDING
3
3
EMI SHIELDED COMPARMENTS
NOTE 4
E E B
MAIN 2
GROUND
CONNECTION POINT
1
1 1
6 6
GROUND PLATES
E E E E E E A C
NOTES:
1. ALL CONDUCTOR SIZES ARE MINIMUM REQUIREMENTS ONLY.
2. GROUND PLATES SHALL BE LIGHT, COLD-ROLLED, OXYGEN-FREE COPPER, APPROXIMATELY 1/8" THICK AND SHALL PROVIDE APPROX- IMATELY 16 SQ. FEET OF TOTAL SURFACE AREA DIVIDED INTO TWO EQUAL PARTS AT THE LOWEST POINT ON THE STRUCTURAL HULL, AS CLOSE AS POSSIBLE TO THE VERTICAL OF THE MAST.
3. SHIELDING OF ADJACENT SHIELDED COMPARTMENTS SHALL BE DIR- ECTLY CONNECTED VIA THE THROUGH-ROD ASSEMBLY (SEE FIGURE C-2).
4. EMI SHIELDING COMPARTMENTS A&B REPRESENT THE NORMAL EQUIPMENT GROUNDING CONFIGURATION (I.E., COMBINATION OF CABLES AND
LOCAL GROUND CONNECTION PLATES FROM A TERMINAL EQUIPMENT TO
THE MAIN GROUND CONNECTION POINT). EMI SHIELDED COMPARTMENT C REPRESENTS AN EQUIPMENT GROUNDING OPTION (I.E., A COMBIN- ATION OF CABLES, LOCAL GROUND PLATES AND COMPARTMENT SHIELD- ING MATERIAL) FROM THE TERMINAL EQUIPMENT TO THE MAIN GROUND CONNECTION POINT. THIS OPTION CAN ONLY BE UTILIZED IF THE SHIELDING MATERIAL AND LOCAL GROUND PLATES CAN BE SHOWN TO CONTINUOUSLY HANDLE THE FULL SHORT-CIRCUIT CURRENT OF THE EQUIPMENT.
ADJACENT SHIELDED COMPARTMENTS THROUGH-ROD
ASSEMBLIES NOTE 3
FIGURE C-1. Nonmetallic hull ship multi-tree ground system.
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