S9407-AB-HBK-010 Datasheet, PDF (135/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
c. R4 and R8 cables require one-inch spacing from each other and from
radiator/susceptor cables R5, R6 and R7. The radiator/susceptor cables R5, R6 and
R7 require from zero to two-inch spacing from radiator cables R1, R2 and R3.
d. R8 cables require one-inch spacing from radiator cables R1, R2, R3 and from
radiator/susceptor cables R4, R5, R6 and R7.
e. R9 cables require zero spacing from radiator cables R1, R2 and R3. (NOTE, R9 may
also be placed with R4, R5, R6, R7, R8 or S1, S2 and S3)
f. S3 cables require two-inch spacing from radiator cables R1, R2, R3 and from
radiator/susceptor cables R4, R5, R6, R7 and R8.
g. Note; S1, S2 and S4 cables in cable group numbers 7 and 8 may be routed with the
radiator/susceptor cables R4, R6, R7 and R8 with no spacing required, but require zero
to two-inch spacing from radiator cables R1, R2 and R3. These susceptor cables could
be placed in the S3 or R8 grouping of cables in the above cableway.
h. Note; for each radiator/susceptor cable category R4 or R5, R6, R7 or R8, the spacers
or shielding conduit or a separate cableway may be used.
6.11 CABLE MARKING
All cables which are categorized by the application of the spacing and shielding requirements
of section 6 should be identified by appropriate cable marking to simplify the installation procedure.
Over the life cycle of a ship, cable categorization and marking will provide a significant reduction in
cost by minimizing postinstallation fixes through cable configuration control. Once the cables have
been categorized, wireway design becomes an extension of the cable spacing concept. This concept
has been successfully implemented in the Trident submarine program.
Cable marking should convey specific information that includes (1) the cable number in
accordance with ship's specifications and (2) the cable designator (in accordance with section 6)
which describes the spacing and shielding requirements for a given cable.
Specific requirements for cable marking are listed below:
a. These categorized cables shall be identified with cable identification tags containing the
above-mentioned information. The preferred cable identification tag is the metallic or
nylon type that is embossed with raised letters and numbers. This type will ensure
retention of information even after being painted.
b. Each cable shall have one tag attached to the cable near each end and also wherever
the cable is terminated by connectors, stuffing tubes, etc., at locations such as an
equipment, a junction box, both sides of a bulkhead, etc.
c. A cable which is enclosed in flexible metal shielding conduit or rigid metal shielding
conduit shall be identified with the cable identification tags mounted on the conduit at
the same locations as described in paragraph b above. The cable identification tag
shall include the cable designator in accordance with table 6-1 that applies to the
unshielded cable.
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