Cisco CISCO3725 Guía de instalación descargar pdf (Pagina 12)

Grounding the Chassis

You must connect the chassis to a reliable earth ground; the ground wire must be installed in accordance with local electrical

safety standards.

• For NEBS-compliant grounding, use size AWG 6 (13 mm

) wire and the ground lug provided in the accessory kit.

• For NEC-compliant grounding, use size AWG 14 (2 mm

) or larger wire and an appropriate user-supplied ring terminal.

• For EN/IEC 60950-compliant grounding, use size AWG 18 (1 mm

) or larger wire and an appropriate user-supplied ring

terminal.

To connect the chassis to a reliable earth ground, perform the following steps:

Step 1 Strip one end of the ground wire to the length required for the ground lug or terminal.

• For the NEBS ground lug—approximately 0.75 in. (20 mm)

• For user-provided ring terminal—as required

Step 2 Crimp the ground wire to the ground lug or ring terminal, using a crimp tool of the appropriate size.

Step 3 Attach the ground lug or ring terminal to the chassis as shown in Figure 6 or Figure 7. For the ground lug, use the two

screws with captive locking washers provided. For a ring terminal, use one of the screws provided. Use a number 2

Phillips screwdriver, and tighten the screws to a torque of 8 to 10 in-lb (0.9 to 1.1 N-m).

Step 4 Connect the other end of the ground wire to a grounding point at your site.

Figure 6 NEBS-Compliant Chassis Ground Connection Using Ground Lug

Figure 7 Chassis Ground Connection Using Ring Terminal

4 Connect Cables

Warning

Do not work on the system, or connect or disconnect cables during periods of lightning activity. Statement 1001

82704

SEE MANUAL BEFORE INSTALLATION

DSU

56K

SEE MANUAL BEFORE INSTALLATION

DSU

56K

BANK 4

BANK 3

BANK 2

BANK 1

BANK 0

NM-HDV

VWIC

2MFT-E1

SEE

MANUAL

BEFORE

INSTALLATION

CTRLR E2

CTRLR E1

Ground lug

103014

SEE MANUAL BEFORE INSTALLATION

DSU

56K

SEE MANUAL BEFORE INSTALLATION

DSU

56K

BANK 4

BANK 3

BANK 2

BANK 1

BANK 0

NM-HDV

VWIC

2MFT-E1

SEE

MANUAL

BEFORE

INSTALLATION

CTRLR E2

CTRLR E1

Ring terminal

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