S9407-AB-HBK-010 Datasheet, PDF (12/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
e. The increasing use of commercial off-the-shelf (COTS) components and systems,
which are not typically subjected to rigorous EMC requirements dictated in MIL-STD-
461 (series).
1.2.1 Design Philosophy on Cable Spacing and Shielding
In order to meet the EMC objective, the following design philosophy on cable spacing and
shielding has been developed. See section 6 for detailed procedures.
a. The most direct and cost-effective method of ensuring protection of susceptible cable
from unwanted energy is by cable selection and spacing, i.e., establish spacing for
cableways.
b. Where physical constraints make it impossible to meet the necessary cable spacing
requirements, external cable shielding is required. Based on the level of shielding
required and cable category, rigid conduit (section 2) or flexible conduit (section 3) is
selected.
c. EMC cable, conduit and cableway markings are essential in preserving the designed
cable spacing and shielding installation.
1.3 BACKGROUND
In March 1968, the original version of this handbook, identified as NAVSHIPS 0967-283-5010
(USL Report No. 603A), entitled "Handbook of Submarine Electromagnetic Shielding Practices," was
prepared by the U.S. Navy Underwater Sound Laboratory, now known as the Naval Undersea
Warfare Center (NUWC), Newport, RI.
Eventually, the name NAVSHIPS was changed to NAVSEA, and in November 1975, as part
of change 4, the basic document number was changed to NAVSEA 0967-LP-283-5010. In December
1976, as part of change 5, the title of NAVSEA 0967-LP-283-5010 was changed to "Handbook of
Shipboard Electromagnetic Shielding Practices" to reflect its applicability to surface ships as well as
submarines. NAVSEA 0967-LP-283-5010 had undergone a total of five changes.
On 1 October 1982, the handbook was revised and was assigned the new identification
number, S9407-AB-HBK-010, under the NAVSEA Technical Manual Identification Numbering System
(TMINS) (Federal Stock No. 0910-LP-047-6300). The title, "Handbook of Shipboard Electromagnetic
Shielding Practices" remained unchanged. On 30 September 1989, the handbook was revised and
S9407-AB-HBK-010, Revision 1 was issued. The title "Handbook of Shipboard Electromagnetic
Shielding Practices" remained unchanged.
1.3.1 Revision 2
This present document is the first change of, and supersedes, S9407-AB-HBK-010, Revision
1 and is identified as S9407-AB-HBK-010, Revision 2. This handbook consists of seven sections and
six appendices. A brief description follows:
a. Section 1 presents a general description of this handbook in terms of its purpose,
objective, and background. In addition, it describes the general content of each section
and appendix. A list of referenced documents is also included.
b. Section 2 describes the requirements for rigid shielding conduit, conduit installation,
preparation methods, and rigid conduit couplings.
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