MIL-STD-2042-4B(SH)
4.2.1 through 4.2.5 shall be observed when double banking optical fiber cables with armored and unarmored electric cables.
4.2.9 Cable retention. Retention of cables on supports can be accomplished by the use of retainers such as contour straps, soft iron flat bars bent over the cables, semi-contour straps or angle-iron retainers. Non toxic strips or channel material shall be used with semi-contour straps, bars, and angle retainers to reduce cable damage, distortion, and chafing (see 4.1.5.2). Cable retention is required at every hanger on vertical cable runs. Cable straps shall be omitted on horizontal cable runs except as follows:
a. Where the hanger has no side brackets.
b. At those locations where the cable runs change direction or pass through beams or bulkheads.
c. Where four consecutive hangers would not require straps. In this case, a minimum of one strap shall be installed on every fourth hanger.
d. Where the horizontal cable supports have multiple tiers.
4.2.10 Cable tags. All permanently installed cables shall be tagged to each point of connection, and on both sides of decks and bulkheads except as follows:
a. Where through cable runs within a compartment are easily traced (such as a vertical run between decks), a single tag will suffice.
b. For cables with both points of connection within a compartment and which can be readily traced, a single tag will suffice.
c. Where compartments are subdivided by internal bulkheads or where machinery or installed equipment makes tracking of cable runs difficult, additional tags shall be provided.
d. For multiple cable penetrations of decks and bulkheads (main cableways), individual cable tags can be omitted, and in lieu thereof, an identification plate shall be installed adjacent to the cableway penetration area showing each cable designation in the order of location in the penetration area.
Cable tags and marking shall be as specified in Part 1 of this standard practice.
4.2.11 Dead-ended cable. Cable installed through error or rendered useless as a result of modifications shall be removed where practical. Vacated and unused penetrations shall be sealed by methods that satisfy the tightness requirements of the structure penetrated.
4.2.12 Temporary exposure of BOF cables to excessive heat. BOF cables are more susceptible to excessive heat than conventional optical fiber cables. During BOF cable installation, care shall be taken to protect BOF cables from temporary exposure to excessive heat.
4.3 Electric cable installation over fiber cables. The installation of electric cables over optical fiber cables should be avoided where possible. Where installation of electric cables over optical fiber cables cannot be avoided, either protective coverings shall be placed over the optical fiber cables during the electric cable installation or personnel shall monitor the optical fiber cable during the electric cable pull to minimize damage to the optical fiber cable.
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