CommScope BOSTM BrightPath Optical Solutions - Manual (Page 18)

Trenching cable/FOCIC - runs of 1000 feet (304 m) or longer
This technique is recommended for runs of 1000 feet (304 m) and longer, but can be used for shorter runs as well.
The length of the cable/FOCIC should be the length of the trench PLUS 15 feet (4.6 m) for every pedestal. Leave
sufficient cable/FOCIC at the upstream end to permit connection to the splice point. keep track of the upstream end
– the tap must be correctly oriented with the headend for the system to operate.
Use a tractor to make a trench 18 in. (45 cm) deep along the route. Make sure the trench bends are not tighter
than the cable/FOCIC bend radius. Back-pull the cable/FOCIC into the trench.
Set the cable/FOCIC at the pedestal locations
Starting at the far end, back-pull enough cable/FOCIC at each pedestal location to create a loop of at least 15 feet
(4.6 m) in circumference. The top of the loop will be head-high on an average-sized person. Twist the loop so that
the cable/FOCIC crosses itself at ground level.
Mark the upstream/headend end of the cable/FOCIC with several wraps of tape.
5.4 Underground Distribution Cable Installation
Trenching for 1000 feet or longer