MIL-STD-2042-4B(SH)
c. Where cables spread out to enter bulkhead stuffing tubes or MCP's, bends shall have a liberal sweep to provide as much flexibility as practicable.
d. Cables having only a minimum spread where they pass through bulkhead stuffing tubes shall have enough slack to give them the same flexibility as other cables in the group.
e. Cables from equipment shall enter cableways in a curve of sufficient radius to prevent transmission of stresses to the equipment during severe cableway deflection.
f. Cables entering or connected to equipment shall have additional slack as specified in Part 2 of this standard practice.
g. Cables crossing expansion joints shall have slack allowance at such points not less than the maximum movement of the expansion joints.
4.2.5 Cable placement in cable hangers. Optical fiber cables shall not be run through the cross-tier mounting holes of cable hanger vertical support channels. Where optical fiber cables are to be mixed with electric cables in the same
cableway, the optical fiber cables shall be installed last and be run on top of the electric cables where possible, and shall be located in the center of the cableway. If electric cables are installed on top of optical fiber cables, they shall be installed in accordance with 4.3.
4.2.6 Installation on bulkheads and overheads. Installation of cables on the overhead and on bulkheads shall be in accordance with the methods described herein. Cables for vital systems such as interior communications and weapons control
systems shall not be secured to the overhead, or to shell planking, or plating, or to ballistic bulkheads without authorized approval (see 3.4).
4.2.6.1 Cable hangers and supports. Cable hangers and supports shall be in accordance with MIL-STD-2003-4 and as specified herein. Only steel hangers and supports shall be used where the deck or bulkhead is steel. Aluminum or steel hangers and supports shall be used where the deck or bulkhead is aluminum; however, if aluminum hangers and supports are used, a steel hanger and support shall be installed not less than every 1.8 m (6 ft). In those locations where the ship structure is aluminum, details of the methods for attaching steel cable hangers to the structure shall be in accordance with NAVSEA Drawing 803-5184182.
4.2.7 Installation on ballistic structures. Attachment of cables and supports to ballistic structures shall be in accordance with the methods described herein and the following:
a. First preference shall be given to routing cables on the inboard or aft bulkheads in the forward half of the ship, and on the inboard and forward bulkheads in the aft half of the ship.
b. Second preference shall be given to routing cables on channels, or in cable racks on angles, attached to overhead deck beams.
c. Cables shall not be routed on the outboard or forward bulkheads in the forward half of the ship, nor on the outboard or aft bulkheads in the aft half of the ship, when the plating is 244 kilograms per square meter (kg/m2) [50 pounds per square foot (lb/ft2)] or heavier.)
4.2.8 Double banking of cable. For surface ships, only one row of cables shall be installed on a cable hanger tier. Where space is limited, and if authorized approval is obtained (see 3.4), double banking (two rows maximum) of cables on tiers is permitted. The requirements of 4.1.5.2 and the restraints of
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