Cisco IAD2431-1T1E1 Guía de instalación Pagina 13

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13
Grounding the Chassis
Warning
This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of
a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if
you are uncertain that suitable grounding is available. Statement 1024
Warning
Use copper conductors only. Statement 1025
Warning
AC connected units must have a permanent ground connection in addition to the power cable ground wire.
NEBS-compliant grounding satisfies this requirement. Statement 284
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
2
) wire and the ground lug provided in the accessory kit.
For NEC-compliant grounding, use size AWG 14 (2 mm
2
) or larger wire and an appropriate user-supplied ring terminal.
For EN/IEC 60950-compliant grounding, use size AWG 18 (1 mm
2
) 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 Locate a suitable ground.
Tip Using a multimeter, measure the resistance between various possible ground locations, such as between the ground of
a junction box (outlet) and the ground of a power tap, between the ground of a junction box and a metal water pipe,
between the Cisco IAD chassis and the ground of a power tap, and between the Cisco IAD chassis and the ground of a
junction box. A good ground connection should read between 0.0 and 0.5 ohms.
Step 2 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 3 Crimp the ground wire to the ground lug or ring terminal, using a crimp tool of the appropriate size.
1
Wall
3
Wall stud
2
Bracket
4
Keyhole (for starter screw)
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