Huawei RTN 380H Quick Installation Manual page 22

Installation Reference
Laying out Cables
General requirements
1. Bend radius
For power and PGND cables, ensure a bend radius of at least three times the cable diameter.
2. Cable binding
•Bind different cables separately. Maintain an interval of at least 30 mm between cable bindings.
•Bind cables securely and neatly, without damaging the cable jackets.
•Ensure that cable ties face the same direction and are aligned in rows horizontally.
•Cut off the excess of each indoor cable tie but leave a slack of about 5 mm for each outdoor cable tie. Ensure that all cut
surfaces do not have sharp edges.
•After installing cables, attach labels or tags to the two ends of each cable.
3. Safety
•Lay out cables away from sharp objects or jagged walls, or protect cables using conduit.
•Lay out cables away from heat sources, or add heat-insulation materials between cables and heat sources.
•At turns or near equipment, allow sufficient slack in the cables and coil them (with a diameter of about 0.6 meters) for
future use.
4. Indoor cable routing
•Route cables into equipment rooms through feeder windows.
•Seek help indoors when routing cables into equipment rooms.
•Waterproof feeder windows.
Requirements for laying out PGND cables
•Connect PGND cables of devices at the same site to the same ground bar.
•Do not route PGND cables overhead in outdoor scenarios.
•Bind PGND cables separately from outdoor network cables and leave an appropriate distance between the bundles.
•Do not add switches or fuses on PGND cables.
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Installing sign plate labels
Attach a sign plate label to each cable end. To do so, pass
cable ties through the holes in the label and attach the label
to one end of the cable, about 100 mm to 200 mm away
from the connector.
Requirements for laying out cables outdoors
•Route cables along the planned path, use outdoor cable ties or feeder clamps to bind cables properly and neatly at intervals of about
1 meter, and cut off the excess of each cable tie without leaving sharp edges (ensuring a slack of about 5 mm).
•Drip loops must be made for outdoor cables below ports or near feeder windows and ensure a bend radius equal to or greater than
the required minimum bend radius.
•After you form a drip loop in a cable, coil the cable into a roll with the diameter greater than 0.6 meters and bind the roll to the tower or
pole for future use.
Drip loop
Drip loop
IDU
Indoor cabinet
Outdoor cabinet
1. Outdoor cable tie
2. Sign plate label
3. Cable
Tighten the cable ties to fix the label on the cable. Then,
cut off the excess of each cable tie, leaving a slack of
about 5 mm and no sharp edges.
NOTE
Outdoor cable ties may be damaged due to installation
and environmental factors. You are recommended to use
feeder clamps in high-temperature and dry environments
or in freezing cold environments.