Underground Installation of CommScope Fiber Optic Cable
CommScope fiber optic cables for direct burial are always armored, while those intended to run in duct or conduit
may be either armored or dielectric constructions. CommScope offers several types of fiber optic cable designed
specifically for underground installation:
Drop a compact, flexible and cost-efficient central tube design for 1 to 12 fibers - its small
diameter translates into excellent flexibility
Central Tube similar design to drop cables but with a higher capacity of up to 48 fibers
Stranded up to 576 fibers - special jacketing options are available including various multiple
Loose Tube jacket/configurations
Static/Vibratory plowing is the most popular method of direct burial. A plow with a special blade slices
through the ground. The cable runs through a tube in the blade and is placed as the plow moves
forward. Since no dirt is displaced, vibratory plowing is much less intrusive than trenching.
Trenching involves digging or plowing a trench, placing the cable in it and then backfilling it. The
trenching depth should be below the frost level for the area.
Boring (directional and conventional) digs or punches a hole in the earth, usually from one trench to
another. It is an excellent method for crossing areas that cannot be plowed (such as paved roads or
railroad tracks) if they cannot be traversed aerially. Cable is then pulled through the hole.
Underground conduit or ductwork allow cable to be pulled through new or existing underground
cableways. The cable may be armored or dielectric. As with aerial installation, careful attention
must be paid to not exceeding the maximum pulling force or the minimum bend radius.
CommScope offers cable pre-installed in conduit. See page 9.1 for details.
Underground Installation of CommScope Fiber Optic CableCommScope fiber optic cables for direct burial are always armored, while those intended to run in duct or conduitmay be either armored or dielectric constructions. CommScope offers several types of fiber optic cable designedspecifically for underground installation:Drop a compact, flexible and cost-efficient central tube design for 1 to 12 fibers - its smalldiameter translates into excellent flexibilityCentral Tube similar design to drop cables but with a higher capacity of up to 48 fibersStranded up to 576 fibers - special jacketing options are available including various multipleLoose Tube jacket/configurationsStatic/Vibratory plowing is the most popular method of direct burial. A plow with a special blade slicesthrough the ground. The cable runs through a tube in the blade and is placed as the plow movesforward. Since no dirt is displaced, vibratory plowing is much less intrusive than trenching.Trenching involves digging or plowing a trench, placing the cable in it and then backfilling it. Thetrenching depth should be below the frost level for the area.Boring (directional and conventional) digs or punches a hole in the earth, usually from one trench toanother. It is an excellent method for crossing areas that cannot be plowed (such as paved roads orrailroad tracks) if they cannot be traversed aerially. Cable is then pulled through the hole.Underground conduit or ductwork allow cable to be pulled through new or existing undergroundcableways. The cable may be armored or dielectric. As with aerial installation, careful attentionmust be paid to not exceeding the maximum pulling force or the minimum bend radius.CommScope offers cable pre-installed in conduit. See page 9.1 for details.
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