MIL-STD-2042-2 Fiber Optic Cable Topology Installation Standard Methods For Naval Ships Equipment Part 2 Of 7 PartsThis standard provides detailed methods for the installation of fiber optic cable topology equipment see 3.16, and optical fiber cable entry to fiber optic cable topology and other equipment.

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MIL-STD-2042-2B(SH)

c.        When visually inspecting an optical fiber, never stare into the end of a fiber connected to a laser source or LED.

3.2  Procedure.

3.2.1 Forming and shaping.

CAUTION:  For equipment containing blown optical fiber tubes, do not disengage mated BOF tube couplers.  Disengaging utilized BOF tube couplers may damage/break the optical fibers contained within the BOF tubes.

Step 1 - Verify that the procedures of Method 2A1 or Method 2B1 of this standard practice have been completed.

Step 2 - Open the enclosure cover and visually examine the OFCCs and loose tube furcation units for cuts, nicks, kinks or twists before forming them into groups.

Step 3 - CAUTION:  Do not exceed the bend diameter of eight times the OFCC or loose tube furcation cable OD for short term bends and sixteen times the OFCC or loose tube furcation cable OD for long term bends.

Observe the connection configuration chart or other approved drawing and form the fibers into groups based on their final destination. Groups may then be formed into bundles and shaped using lacing or self-clinching straps in accordance with MIL-STD-2003-1, figures 1B5 and 1B6 respectively.  Lace or strap the groups loosely; do not tighten down the straps with the hand tool.

Step 4 - Route the fiber bundles around the box securing them to the box mounting brackets using the self-clinching straps.  Observe the following during routing (see figure 2C1-1):

a.        All OFCCs and loose tube furcation cables shall be routed one-half of the way around the box and then to the termination point.

b.        When a direct route to a termination point would exceed the OFCC or loose tube furcation cable long-term bend diameter of sixteen times the OFCC or furcation cable OD, an indirect route shall be used.

c.        Groups and bundles shall not cross the splice trays or patch panels or in any other way obstruct access to the individual connectors, splices or adapters.  Groups and bundles may be routed between the splice tray or connector patch panel modules, if necessary.

d.        Groups and bundles shall be protected from possible damage by sharp edges by the use of supporting brackets or by synthetic tubing at the point of the sharp edge.

2C1-2                         METHOD 2C1