Bridge/Router Installation Guide

2-10
Cisco CRS-1 Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-07
Chapter 2 Installing and Removing Power Components
DC Power Systems on the Cisco CRS-1 4-Slot Router
Table 2-3 provides the correlation between wire gauge and the resistance (in Ohms for each 1000 feet of
wire) for copper wire.
Ta b l e 2-2 Wire Gauge for Current Loads Over Copper Wire Lengths
DC Current (Amps) 25 Feet 50 Feet 75 Feet 100 Feet 150 Feet 200 Feet 400 Feet
5 A 18 AWG 14 AWG 14 AWG 12 AWG 10 AWG 8 AWG 6 AWG
10 A 14 AWG 12 AWG 10 AWG 8 AWG 8 AWG 6 AWG 2 AWG
15 A 14 AWG 10 AWG 8 AWG 8 AWG 6 AWG 4 AWG 2 AWG
20 A 12 AWG 8 AWG 8 AWG 6 AWG 4 AWG 2 AWG 0 AWG
25 A 12 AWG 8 AWG 6 AWG 4 AWG 4 AWG 2 AWG 0 AWG
30 A 10 AWG 8 AWG 6 AWG 4 AWG 2 AWG 2 AWG 00 AWG
35 A 10 AWG 6 AWG 4 AWG 2 AWG 2 AWG 1 AWG 000 AWG
40 A 8 AWG 6 AWG 2 AWG 2 AWG 2 AWG 0 AWG 000 AWG
45 A 8 AWG 6 AWG 4 AWG 2 AWG 1 AWG 0 AWG 0000 AWG
50 A 8 AWG 4 AWG 4 AWG 2 AWG 1 AWG 00 AWG N/A
55 A 8 AWG 4 AWG 2 AWG 2 AWG 0 AWG 00 AWG N/A
60 A 8 AWG 4 AWG 2 AWG 2 AWG 0 AWG 00 AWG N/A
65 A 6 AWG 4 AWG 2 AWG 1 AWG 0 AWG 000 AWG N/A
70 A 6 AWG 4 AWG 2 AWG 1 AWG 00 AWG 000 AWG N/A
75 A 6 AWG 4 AWG 2 AWG 1 AWG 00 AWG 000 AWG N/A
100 A 4 AWG 2 AWG 1 AWG 00 AWG 000 AWG N/A N/A
Ta b l e 2-3 Resistance for Each Gauge of Copper Wire
Wire Gauge (AWG) Ohms for Each 1000 Feet of Wire
0000 AWG 0.0489
000 AWG 0.0617
00 AWG 0.0778
0 AWG 0.098
1 AWG 0.1237
2 AWG 0.156
3 AWG 0.1967
4 AWG 0.248
5 AWG 0.3128
6 AWG 0.3944
7 AWG 0.4971
8 AWG 0.6268
9 AWG 0.7908
10 AWG 0.9968