Cabinet Requirements; Installing A Device - Huawei 3 U Quick Installation Manual

4

Cabinet Requirements

N OT E
The cabinet may be installed on an ESD floor or a concrete floor. For de-
tails about how to install a cabinet, see the Cabinet Installation Guide
delivered with a cabinet.
The device must be installed in an IEC 19-inch cabinet or an ETSI 21-inch
cabinet.
Huawei A63B cabinet is recommended. If customers choose to purchase
cabinets by themselves, the cabinets must meet the following require-
ments:
1. 19-inch or 21-inch cabinet with a depth of greater than or equal to
300 mm.
2. The cabling space in front of the cabinet complies with the cabling
space requirements of boards. It is recommended that the distance
between the cabinet door and any device board be greater than or equal
to 120 mm. If the cabling space is insufficient, cables will block the
cabinet door from closing. Therefore, a cabinet with broader cabling
space is recommended, such as a cabinet with a convex door.
3. The device draws air from the left side and exhausts from the right
side. Therefore, if the device is installed in a 19-inch cabinet, there must
be a clearance of at least 75 mm at the left and right sides of the cabinet
to ensure good ventilation.
4. The porosity of each cabinet door must be greater than 50%, meeting
heat dissipation requirements of devices.
5. The cabinet has installation accessories, such as guide rails, floating
nuts, and screws.
6. The cabinet has a ground terminal to connect to the device.
7. The cabinet has a cable outlet on the top or at the bottom for
overhead or underfloor cabling.
5

Installing a Device

CAUTION
When installing a device in a cabinet, ensure that the total heat
consumption of all devices in the cabinet does not exceed the heat
dissipation capability of the cabinet.
To prevent air return from affecting heat dissipation, leave at least 2 U
space between devices in the cabinet. In addition, if the cabinet has
middle columns, devices can be installed in stacking mode.
Do not block the heat dissipation holes on panels.
A device that needs to share the same cabinet with other devices cannot
be installed near the air exhaust vents of those devices.
Consider the impact of a device's air exhaust vent on adjacent devices to
prevent high temperature.
When fastening floating nuts, ensure that there is at least 75 mm space
on the left and right sides of the device for ventilation after device
installation.