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2-3

Cisco Catalyst 490 0M Switch Ins talla tion Guid e

78-18350-02

Chapter 2 Site Planning

Site Power Requiremen ts

Warni n g

Ultimate disposal of this p roduct should be ha ndled a ccordin g to all na tiona l laws and r egulat ions.

Statement 1040

EMI Recommendat ions

Follow these guidelines when setting up the site wiring. When planning the location of the new system,

consider electromagnetic interface (EMI), the distance limitations for signaling, and connector

compatibility.

When wires are run for any significant distance in an electromagnetic field, radio frequency interference

(RFI) can occur between the field and the s ignals on the wires.

• Bad plant wiring can result in radio frequency interference .

• Strong EMI, especially when caused by lightning or radio transmitters, can destroy the signal drivers

and receivers in the switch and can create an electrical hazard by conducting power surges through

lines and into equipment.

Note To predict and remedy strong EMI, you might need to consult RFI expe rts.

Power Requ irements a nd Heat Dissipa tion

The power requirements might be useful for planning the power distribution system needed to support

the switches. Heat dissipation is an important consideration for sizing the air-conditioning requirements

for an installation. Refer to Appendix A, “Specifications,” for the powe r and heat rating s for a

Catalyst 4900M switch.

You will also need to provide power to the switch with the appropriate AC power cord for your location.

Table 2-1 lists the specifications for the AC power cords that are available for the 1000 W AC-input

power supply. The table includes references to illustrations of the AC power cords.

Tabl e 2-1 1000 W AC-Inp ut Power Supp ly Power Cords

Locale Po wer Co rd Part Nu mbe r AC Sou rce Plug

Type

Cordset Rating Power Cord

Reference

Illustration

Argentina C AB-IR2073-C15- AR=

(was CAB-7KACR=)

IRAM 2073 10 A, 250 VAC Figure 2-1

Australia,

New Zealand

CAB-AS3112-C15-AU=

(was CAB-7KACA=)

SAA AS 3112 10 A, 250 VAC Figure 2-2

Continental Europe CAB-CE E77-C15-EU=

(was CAB-7KACE=)

CEE 7/7 10 A, 250 VAC Figure 2-3

Italy CAB-C2316- C15-IT=

(was CAB-7KACI=)

CEI 23-16/7 10 A, 250 VAC Figure 2-4

North America,

Japan

CAB-US515-C15-US=

(was CAB-7KAC=)

NEMA 5-15

13 A, 125 VAC Figure 2-5