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# Hardware Installation and Maintenance Guide

## AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600

##### This section provides brief procedure for installing the AR series routers. This document describes preparations before AR series routers installation, installation methods and precautions, AR series routers maintenance, and common methods for troubleshooting typical hardware module faults.
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Assembling Power Cables

### Assembling Power Cables

#### Context

Figure 7-1 shows the components of an OT terminal and a power cable.

Figure 7-1  Components of an OT terminal and a power cable

 A. Heat-shrinkable tubing B. Bare crimping terminal C. Insulation D. Conductor

#### Procedure

1. Based on the cross-sectional area of the cable conductor, strip a length of insulation coating C to expose the conductor D of length L1, as shown in Figure 7-2. The recommended values of L1 are listed in Table 7-6.

Figure 7-2  Stripping a power cable (OT terminal)

• When you strip a power cable, do not damage the conductor of the cable.
• If the bare crimping terminal is not provided by Huawei, the value of L1 is 1 mm (0.04 in.) to 2 mm (0.08 in.) greater than the value of L.
Table 7-6  Mapping between the cross-sectional area of the conductor and the value of L1

Cross-Sectional Area of Conductor (mm2(in.2))

Value of L1 (mm(in.))

Cross-Sectional Area of Conductor (mm2(in.2))

Value of L1 (mm(in.))

1 (0.002)

7 (0.28)

10 (0.015)

11 (0.43)

1.5 (0.002)

7 (0.28)

16 (0.025)

13 (0.51)

2.5 (0.004)

7 (0.28)

25 (0.039)

14 (0.55)

4 (0.006)

8 (0.31)

35 (0.054)

16 (0.63)

6 (0.009)

9 (0.35)

50 (0.077)

16 (0.63)

NOTE:

If you are proficient in assembling OT terminals and power cables, you can obtain the value of L1 by comparing the part to be crimped with the power cable.

2. Put the heat-shrinkable (A) tubing onto the bare crimping terminal, as shown in Figure 7-3.

Figure 7-3  Putting the heat shrink tubing onto the bare crimping terminal

3. Put the OT terminal B onto the exposed conductor, and ensure that the OT terminal is in good contact with the insulation coating C, as shown in Figure 7-3.

After the conductor is fed into the OT terminal, the protruding part of the conductor, or L2 in Figure 7-3, must not be longer than 2 mm (0.08 in.).

4. Crimp the joint parts of the bare crimping terminal and the conductor, as shown in Figure 7-4.

NOTE:

The shapes of crimped parts may vary with the crimping dies.

Figure 7-4  Crimping the joint parts of the bare crimping terminal and the conductor (OT terminal)

5. Push the heat shrink tubing (A) toward the connector until the tube covers the crimped part, and then use a heat gun to heat the tube, as shown in Figure 7-5.

Figure 7-5  Heating the heat shrink tubing (OT terminal)

Stop heating the shrink tubing when the connector is securely locked in the shrink tubing. Do not heat the shrink tubing too long as this may damage the insulation coating.

#### Context

Figure 7-6 shows the components of a JG terminal and a power cable.

Figure 7-6  Components of a JG terminal and a power cable

 A. JG terminal B. Heat-shrinkable tubing C. Insulation layer of a power cable D. Conductor of a power cable

#### Procedure

1. Strip a part of the insulation to expose the cable conductor with a length of L, as shown in Figure 7-7. The recommended values of L are listed in Table 7-7.

• When you strip a power cable, do not damage the conductor of the cable.
• If the bare crimping terminal is not provided by Huawei, you can adjust the value of L as required.
Figure 7-7  Stripping a power cable (JG terminal)

Table 7-7  Mapping between the cross-sectional area of the conductor and the value of L

Cross-Sectional Area of Conductor (mm2(in.2))

Value of L (mm(in.))

16 (0.025)

13 (0.51)

25 (0.039)

14 (0.55)

35 (0.054)

16 (0.63)

50 (0.077)

16 (0.63)

2. Put the heat shrink tubing onto the bare crimping terminal, as shown in Figure 7-8.

Figure 7-8  Putting the heat shrink tubing onto the bare crimping terminal

3. Put the bare crimping terminal onto the exposed conductor, and ensure that the bare crimping terminal is in good contact with the insulation of the power cable, as shown in Figure 7-8.
4. Crimp the joint parts of the bare crimping terminal and the conductor, as shown in Figure 7-9.

Figure 7-9  Crimping the joint parts of the bare crimping terminal and the conductor (JG terminal)

5. Push the heat shrink tubing toward the connector until the tube covers the crimped part, and then use a heat gun to heat the tube, as shown in Figure 7-10.

Figure 7-10  Heating the heat shrink tubing (JG terminal)

#### Context

Figure 7-11 shows the components of a cord end terminal and a power cable.

Figure 7-11  Components of a cord end terminal and a power cable

 A. Cord end terminal B. Insulation layer of a power cable C. Conductor of a power cable

#### Procedure

1. Strip a part of the insulation to expose the cable conductor with a length of L1, as shown in Figure 7-12. The recommended values of L1 are listed in Table 7-8.

When you strip a power cable, do not damage the conductor of the cable.

Figure 7-12  Stripping a power cable (cord end terminal)

Table 7-8  Mapping between the cross-sectional area of the conductor and the value of L1

Cross-Sectional Area of Conductor (mm2(in.2))

Value of L1 (mm(in.))

Cross-Sectional Area of Conductor (mm2(in.2))

Value of L1 (mm(in.))

1 (0.002)

8 (0.31)

10 (0.015)

15 (0.59)

1.5 (0.002)

10 (0.39)

16 (0.025)

15 (0.59)

2.5 (0.004)

10 (0.39)

25 (0.039)

18 (0.71)

4 (0.006)

12 (0.47)

35 (0.054)

19 (0.75)

6 (0.009)

14 (0.55)

50 (0.077)

26 (1.02)

2. Put the cord end terminal onto the conductor, and ensure that the conductor is aligned with the edge of the cord end terminal, as shown in Figure 7-13.

After the conductor is fed into the cord end terminal, the protruding part of the conductor must not be longer than 1 mm (0.04 in.).

Figure 7-13  Putting the cord end terminal onto the conductor

3. Crimp the joint parts of the cord end terminal and the conductor, as shown in Figure 7-14.

Figure 7-14  Crimping the cord end terminal and the conductor

4. Check the maximum width of the tubular crimped terminal. The maximum width of a tubular crimped terminal is listed in Table 7-9.

Table 7-9  Maximum width of a tubular crimped terminal

Cross-Sectional Area of Tubular Terminal (mm2(in.2))

Maximum Width of Crimped Terminal W1 (mm(in.))

0.25 (0.0004)

1 (0.04)

0.5 (0.0008)

1 (0.04)

1.0 (0.0015)

1.5 (0.06)

1.5 (0.0023)

1.5 (0.06)

2.5 (0.0039)

2.4 (0.09)

4 (0.006)

3.1 (0.12)

6 (0.009)

4 (0.16)

10 (0.015)

5.3 (0.21)

16 (0.025)

6 (0.24)

25 (0.039)

8.7 (0.34)

35 (0.054)

10 (0.39)

Translation