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Cisco AC/DC Power System User Guide, R1.0
May 2006
Chapter 2 System Installation
2.2.3 Install the Ground Cable
Figure 2-8 Installing 1 RU DC Cabling
2.2.3 Install the Ground Cable
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
The equipment rack/cabinet, system, and optional distribution shelf need to be properly grounded to
ensure the safe and efficient operation of the Cisco AC/DC Power System. Refer to NEC, CEC, ANSI
T1-333, ETSI 300-386-TC, and local codes for guidelines on bonding telecom DC power equipment to
building ground.
The system shelf should be connected to the rack/cabinet frame by a UL-listed 6 AWG (16mm²) wire
with an insulation rating of at least 75° Celsius. Two #10 studs are provided at the rear of the shelf. The
connection at the shelf end is made using a UL-listed double-hole lug 1/4in and 5/8in. center-to-center
(lug part # Panduit LCD6-14A-L or equivalent).
The optional 1 RU Distribution Shelf should be bonded to the frame by a UL-listed 6 AWG (16mm²)
wire with an insulation rating of at least 75° Celsius. Two #10 studs are provided at the rear of the shelf
for this purpose. The connection at the shelf end is made using a UL-listed double-hole lug 1/4in. and
5/8in. center-to-center (lug part # Panduit LCD6-14A-L or equivalent).
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