(3)
Backfill the trench. Do not place stones or sharp object on the wire. These
objects could crush the wire insulation when passing vehicles cross over the trench. Try not to leave a
high bump or small trench when you backfill.
(4)
Leave enough slack on the running end of the wire, rolled up and taped, to permit
replacement of the wire in the trench. The running end is the direction you are going. Another useful
technique for wire replacement is to place a spare wire in the trench with the working pair. This spare
line should be tagged and tied to stakes with sufficient slack for splicing.
Figure 1-21. Wire buried in a trench to cross road.
10.
Crossing a railroad. When field wire lines must cross railroad tracks, great care must be
exercised in selecting the crossing site. If possible, the lines should cross underneath through culverts or
aerially on bridges or via ducts. If none of these are available, lay the wires under the rails as shown in
Figure 1-22.
1-29
SS0440
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