S9407-AB-HBK-010 Datasheet, PDF (195/276 Pages) Glenair, Inc. – HANDBOOK OF SHIPBOARD ELECTROMAGNETIC SHIELDING PRACTICES

S9407-AB-HBK-010, Rev. 2
B-3.3 Generate Cable Spacing Matrix
The interface cable spacing matrix compares the section 6 cable categories to the interface cable
categories. Cable spacing is specified at matrix coordinates when the cable designator can be fully
described. When this is not the case, the procedures of section 6 must be used to determine the spacing.
B-3.4 Resolve Prohibitive Cable Spacing Requirements
Interface cable spacing may become prohibitive where the requirements of both systems must be
satisfied. In these cases, tradeoffs may be necessary to resolve problems. It should be noted that this
approach may lead to greater overall cable spacing than that required by either system when installed
separately.
B-4 SECTION 5 AND SECTION 6 CABLE SPACING AND SHIELDING INTERFACE REQUIREMENTS
B-4.1 Section 5 Versus Section 6 Functional Equivalence
A review of the development of section's 5 and 6 shows that their spacing requirements do not
correspond quantitatively. Section 6 spacing requirements were developed using mathematical analyses
and validation testing and can be numerically defined - - this was not the case with section 5
requirements. To develop a numerical relationship between these sections, the section 5 cables are
recategorized using section 6 criteria. This establishes the functional equivalence between cable
categories presented in table B-1.
B-4.2 Section 5 Versus Section 6 Interface Spacing and Shielding Requirements Matrix
Employing the functional equivalence concept of paragraph B-3.1 and section 6 cable category
spacings, joint interface spacing requirements were developed. The cable interface spacing/shielding
requirements matrix is presented in table B-2. It should be noted that the cable spacings given in the
matrix represent a worst case, i.e., the greatest spacing to ensure compatibility.
B-5 CABLE SPACING AND SHIELDING REQUIREMENTS AT THE INTERFACE OF CCS (SECTION 6)
AND SWS
B-5.1 Section 6 Versus SWS Functional Equivalence
The SWS cables were recategorized using section 6 criteria and observing the SWS definitions
and requirements given in SWS Coordination Drawing 3191445, Rev F. A functional equivalence was
established as a result of this effort.
B-5.2 CCS Versus SWS Interface Spacing and Shielding Requirements Matrix
As in the case of the section 5 versus section 6 matrix (table B-2), a similar set of requirements for
CCS versus SWS was developed. This spacing and shielding matrix is presented in table B-3.
B-2