Handling Equipment Precautions and Guidelines
Handling Fiber-Optic Cables
Fiber-optic cables require special handling and connecting
procedures. They can be damaged when handled or routed
improperly.
If you plan to install a front cover on your HD shelf and you use
cables with MPOconnectors, you must also install the front cover
extension. To determine if your shelf rack or cabinet configuration
supports front covers and extensions, and for more information about
accessory installation requirements, see Accessory Installation
Requirements.
To avoid damaging the glass fiber, observe these guidelines:
l Never bend fiber-optic cables at sharp angles, that is, angles less than a 30 mm (1.2
in.) radius. Do not exceed the values for minimum bend radii and maximum tensile
loading, which depends on the type of fiber-optic cable.
l Make sure to use only fiber-optic cables that have flexible bending protection.
l Do not knot or overflex fiber-optic cables.
l To a Avoid mechanical stress, route unsupported fiber-optic cables only over short
distances. Frequent mechanical stress can cause progressive degeneration of fiber-
optic cables.
l Avoid tightening or causing pressure to fiber-optic cables.
l Avoid twisting a cable, or crossing one cable over another.
l Avoid excess cable length. Use a spiral wrap or equivalent.
l Do not tie fiber-optic cables together with a cable clamp or tie strap.
l Do not stand on fiber-optic cables. Keep the cables off the floor.
l Do not allow a greater static load on any section of the fiber-optic cable.
l Do not over pull fiber-optic cables. When you connect or disconnect a fiber-optic
connector, hold the knob of the plug casing, that is the plastic movable part. Pull the
cable from a point that is several centimeters or inches away from the connector.
l The most vulnerable areas of a fiber-optic cable are the connector plugs. Use extreme
care when you remove or install fiber-optic connector plugs to avoid damaging the
connector housing or scratching the end-face surface of the fiber.
l Cover the fiber-optic connectors with protective caps when the connectors are not in
use.
l Only remove the protective caps immediately before you connect a fiber-optic cable.
l Never use tools when you connect or disconnect fiber-optic cables. Excessive force
can damage or misalign the connection system.
l Never place tools or other hard and heavy items on top of the fiber cable.
l Store unused fiber-optic cables in a cabinet or on a cable rack.
l Clean fiber-optic equipment as described in Inspecting and Cleaning Fiber-optic
Connectors and Receptacles. Never wipe an optical fiber with abrasive material or
organic solvents such as acetone.
l Keep power cables, data cables, and fiber-optic cables clear of foot traffic. Route
cables in vertical cable ducts on the rack under the floor, through the ceiling, or in
protective channels.
l Never eat, drink, or smoke when you work with fibers.
FSP 3000R7 High-Density Subshelf Guide - R17.2 - Issue:B 472
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