S9407-AB-HBK-010 Datasheet, PDF (134/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
e. If the required spacing of figure 6-6 is still not practical, recalculate the spacing
requirements with the radiator cables installed in rigid conduit. Partial shielding in
accordance with Paragraph 6.7.1 should be considered where appropriate.
f. A minimum spacing of 8-inches, where practical, should be maintained between
susceptor and radiator cableways to make an observable spacing which would prevent
cable from being inadvertently routed between the radiator cableway and the susceptor
cableway.
g. Indirect coupling paths may result from a cable routed with radiator cables for a portion
of its run and then routed with or near susceptor cables for the remainder of its run.
Therefore, cables shall remain in either the radiator cableway or susceptor cableway
and shall not be routed from one to the other.
6.10.2 Guidelines for Radiator Cableway Design
The following information on radiator cableway design is obtained from the cable spacing
chart of figure 6-6.
a. Radiator cables in categories R1, R2, R3 and R9 may be routed together, without
spacing requirements.
6.10.3
Guidelines for Radiator/Susceptor and Less-Sensitive Susceptor Cable
Cableway Design
Cables that are both radiators and susceptors (radiator/susceptor) and less-sensitive
susceptor cables may be routed in cableways with radiator cables provided spacing requirements are
maintained by installed hardware (spacers).
A possible radiator cableway layout (grouping of cables) which provides minimum cable
spacing for radiator/susceptor cables by means of spacers is shown in the schematic below. The
rectangles represent one-inch and two-inch spacers. The spacers indicated may be of any material
and shape or form that provides and maintains the required spacing, is inexpensive, and has low
flammability and toxicity. Some suggestions are a hollow or corrugated extrusion, "doughnuts", etc.
The minimum spacing requirements for the cable categories shown in the schematic below
apply to cables not enclosed in shielding conduit. If cables are enclosed in shielding conduit, no
spacing is required for that group of cables. The rationale for this cableway layout, based on figure 6-
6, is provided below.
1"
1"
1"
2"
R1, R2
R3, R9
R5
R4
R8
R6, R7
S3
Cableway Schematic Showing Groupings and Spacers
a. R4 cables require one-inch spacing from the radiator cables R1, R2 and R3 and the
radiator/susceptor cables R5, R6, and R7.
b. R5, R6 and R7 cables may be routed together.
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