Huawei NetEngine-8000-M8 Manual page 14

The electrical conductor of a power cable must be completely inserted into a DC connector to protect
you from a possible electric shock. Shut down power supplies before connecting or removing a power
cable.
Power cables must be connected according to indications on the PIU board. If the power cables are
not connected correctly, the equipment cannot be powered on.
When installing DC power cables, ensure the following:
•
There must be no joints on a power cable.
•
Excess power cables must be cut off and must not be coiled.
•
A power cable bend must be smooth, and its radius must be 20 mm or larger.
•
Power cables must have no bare copper wires.
•
Power cables and grounding cables are routed on the right side, and signal cables are routed on the
left side. It is recommended that power cables and signal cables be routed separately.
•
Route power cables separately from signal cables if possible. If they have to be routed together, bind
them separately outside the cabinet at intervals of greater than 3 cm.
•
PIU power modules back each other up.
•
When routing power cables, attach temporary labels to them. After power cables are installed, attach
formal labels to them.
•
Do not bundle or route outdoor cables (such as outdoor antenna feeders and outdoor power cables)
and indoor cables together in the cabinet or on the cable tray.
•
To remove a DC power terminal, pull the puller outwards, without touching the screws on both sides.
NEG（blue）
RTN （black）
Remarks: Cable colors are for reference only. The actual cable colors depend on the requirements of the
target country or customer.
Pull out
14
Equipmen
NEG(-)
RTN(+)
t room or
power
system
-48V 0V
Equipmen
NEG(-) RTN(+)
t room or
power
system
-48V 0V