Specifications

Cisco 7500 Series

Cisco Site Preparation Guide

3-22

• For AC-input installations, install an uninterruptible power source where possible.

• Install proper grounding to avoid damage from lightning and power surges.

• For both AC-input and DC-input installations, observe the power speciﬁcations listed in

Table 3-18.

The AC-input-powered chassis operating at 120 VAC requires, at the minimum, a 20-amp service,

with a 20-amp receptacle at the power source. The power cable supplied with the chassis uses a

20-amp plug. Figure 3-1 shows the cable features needed to connect the 20-amp plug to your AC

source.

Figure 3-1 20-A AC Power Cable Connector, Plug, and 20-amp Receptacle

Note Wiring codes prevent 20A plugs from being used with most equipment rack power strips.

The DC powered chassis requires a minimum 35A dedicated service (at – 48VDC). We recommend

that you use an 8 AWG, highly ﬂexible, stranded cable for the DC power connections. The stranded

cable should be routed through conduit at your site, and the conduit should attach to the terminal

block cover on the power supply. (See Figure 3-2.)

Figure 3-2 Terminal Block Cover

H3164

IEC 320 20-amp connector

(to the AC power supply)

20-amp plug 20-amp receptacle

H3033

FAIL

FAN

OUTPUT

Terminal

block

cover

Remove

DC-input power supply