Site Requirements Guidelines
Cisco 12008 Gigabit Switch Router Installation and Configuration Guide
2-14
Power Guid eli nes
The Cisco12008 router can be configured with either AC-input or DC-input power
supplies.
Note Combining an AC-input power supply with a DC-input power supply in the same
router is not allowed.
A minimally configured router has one AC-input power su pp ly or one DC-input power
supply. Site requirements for the power supplies differ, depending on t he type of source
voltage required for the installed power supply(ies).
Observe the following general precautions and recommendations in planning the source
power requirements for your router:
•Check the power at your site before router installation (and periodically after
installation) to ensure that clean power is being received. Install a line conditioner, if
necessary, to ensure proper voltages and power levels in the source voltage for the
system.
•Install proper grounding for the site to avoid damage from lightning and power surges.

AC-Powered Systems

In a router to be equipped with AC-input power supplies, observe the followin g guideline s:
•The power supply must operate with a source voltage ranging from 185 to 264 VA C; the
AC-input power supply requires a 20A service minimum for North America and 10A or
16A for the international area.
•Several styles of AC-input power supply po wer cord s are a vailable; make sure that you
have the correct style for your site (see Figure2-5 and Table 2-1).
All AC-input power supply power cords are 14 feet (4.3 m) in length.
•Check the power at your site before installation and periodically thereafter to ensure that
you are receiving clean power that is free of noise. Install a line conditioner, if necessary ,
to ensure proper electrical characteristics of source power.