Installation Environment Checklist

1

Site selection

The site of the equipment room must be free of high or low temperature, heavy dust, harmful gas, inflammable or explosive materials, electromagnetic interference (nearby large-sized radar station, broadcast transmitting station, or transformer station), unstable electric voltage, and large vibration or strong noise. Therefore, during the engineering design, you need to consider hydrology, geography, earthquake, electric power, and transportation conditions according to the technical requirements for communication network planning and communication devices.

2

Civil construction

The size of the equipment room must be sufficient for product installation and capacity expansion. The floor can meet the bearing weight requirements. The cable slot, cable ladder, and cable holes are complete or ready. The decoration is complete.

3

Operating ambient temperature

For details, see "Environmental Requirements" in the product description specific to your product model and version.

4

Altitude

5

Particle contaminants

6

Corrosive airborne contaminants

7

Vibration and shock

8

Air conditioner

If the temperature in the room exceeds 35°C (95°F), you are recommended to install air conditioners (which can be restarted after power-off). Do not let the air conditioner blow directly toward the devices.

9

Moisture-proof measures

If the relative humidity is greater than 70%, install the dehumidifying device, such as the air conditioner with the dehumidification function or special dehumidifier. Ensure that the equipment room is protected from water seepage and dew.

10

Heating

For an environment where the average daily temperature is lower than 5°C (41°F) for at least 90 days each year, heating devices are required. For an environment where the average temperature is lower than 5°C (41°F) for 60 to 90 days each year, heating devices are recommended.

11

Dust-proof measures

For the equipment room near dust sources (such as coal mines, country roads, or farmland), use double-layer aluminum alloy windows for proper sealing and an anti-theft and fireproof door. Separate the devices from the door with a partition board to avoid dust.

12

Ground resistance

Less than 10 Ω. The distance between the top of the ground terminal and the ground should be at least 0.7 m (27.56 in.). In the cold regions, the ground terminal should be buried under the layer of frozen earth. Periodically monitor ground resistance to ensure ground effectiveness.

13

Ground lead-in

The ground bar in the equipment room should be connected to the network of ground cables. The ground lead-in should not be longer than 30 m (98.4 ft.) and should use the zinc-coated flat steel whose cross-sectional area is equal to or more than 40 mm (1.57 in.) x 4 mm (0.157 in.). The contact point should be handled for insulation and anticorrosive purposes. The above-ground steel should be provided with measures to avoid mechanical damage and should be intact without soldering points for the break.

14

Neutral-ground voltage

A neutral-ground voltage lower than 2 V is recommended. The maximum value is 4 V. Ensure that the device is properly grounded.

15

Lightning protection

The equipment room must be provided with lightning conductors such as the lightning rod or lightning belt. The lightning conductors share the ground bars with the protection ground cables of the equipment room.

16

AC voltage

For details, see Electrical Specifications in Specifications Query (https://support-it.huawei.com/spec/#/home).

17

High voltage DC

18

AC power ground

Do not connect the neutral line of a power cable to the protection ground bar of any communication devices in the equipment room. It is recommended that you set leading-out terminals for AC safety ground in the equipment room for the connection to devices.

19

AC surge protection

The AC power system of the equipment room must be equipped with a lightning arrester with the rated discharging current no less than 20 kA. The arrester must be properly grounded.

20

Transmission device

The debugging of the transmission device is complete, and the capacity of the transmission device meets the engineering requirements. The protection ground of the transmission system must be connected to the ground bar in the equipment room.

a: ISO, International Organization for Standardization.

b: Å, Ångström, a unit of length. One Å is equal to 1/10,000,000,000 meter.

c: ANSI, American National Standards Institute.

d: ISA, Instrument Society of America.