MIL-STD-2042-1 Fiber Optic Cable Topology Installation Standard Methods For Naval Ships Cables Part 1 Of 7 PartsThis standard provides detailed methods for fiber optic cable selection, handling, marking, and repair.

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MIL-STD-2042-1B(SH)

NOTE:        There should be a gap (2 to 3 mm (0.1 in)) between the tube coupler and the single tube BOF cable jacket.  If there is not a gap, remove the tube from the tube coupler, strip off 2 to 3 mm (0.1 in) of the single tube BOF cable jacket, and reinstall the tube within the tube coupler.

Step 15 -Apply an axial load of approximately 22 N (5 lbs) between the single tube BOF cable and the tube coupler to verify that the BOF tube is properly engaged into the tube coupler.  Move the shrink sleeve up the single tube BOF cable so that it is even with the end of the single tube cable jacket.

Step 16 -CAUTION: Do not overheat the BOF cable.  Prolonged exposure of the jacket to temperatures above 160oC (320oF) may damage the BOF tube and the BOF cable jacket.  Discontinue heating of the sleeve and allow the BOF tube or BOF cable jacket to cool before reheating if either shows any signs of bubbling.

For heat shrink sleeves only:  Holding the heat gun approximately 100 mm (4 in) away, heat evenly from the center to the ends around the entire sleeve. Heat until the sleeve has shrunk to a snug fit around the single tube cable and the sealant is flowing at the ends (see figure 1D1-1).

For cold shrink sleeves only:  Remove the sleeve center support and allow the sleeve to shrink into place.

Tube

Connector

Shrink

Sleeve

Single Tube

Cable

FIGURE 1D1-1.  Installed single tube BOF cable sleeve.

Step 17 -Clean the end of the BOF tube of the multiple-tube BOF cable with a wipe dampened with alcohol and blow dry as necessary.  Slide the tube coupler of the single tube BOF cable onto the BOF tube of the

multiple-tube BOF cable and firmly seat the tube within the tube

coupler.

Step 18 -Apply an axial load of approximately 22 N (5 lbs) between the single tube BOF cable and the multiple-tube BOF cable to verify that the BOF tubes are properly engaged into the tube coupler.

Step 19 -Repeat steps 9 through 18 for each single tube BOF cable to be connected.

Step 20 -Fill in any depressions or voids within the exposed BOF cable end with the sealant tape, to restore the cable contour as follows:

WARNING: Application of too much heat will cause the adhesive to flow and may cause burns if it comes in contact with the skin.

1D1-4

METHOD 1D1