Installation - 2
Table 2-6. Ampacity and Resistance of Stranded Copper Conductors
AWG No.
10
8
6
4
2
1/0
2/0
3/0
4/0
Area
in mm2
5.26
8.36
13.3
21.1
33.6
53.5
67.4
85.0
107
Ampacity
40
60
80
105
140
195
225
260
300
Resistance in Ω/meter
0.00327
0.00206
0.00129
0.00081
0.00051
0.00032
0.00025
0.00020
0.00016
Resistance
in Ω/feet
0.00099
0.00062
0.00039
0.00025
0.000156
0.000098
0.000078
0.000062
0.000049
Notes
1.Wire ampacities are based on 30° C ambient temperature with conductor rated at 60° C.
2.Resistance is nominal at 20° C wire temperature.
Figure 2-1 illustrates two typical power bus configurations consisting of two Agilent E4370A MCCD mainframes connected to one Agilent E4371A Powerbus Load and two external dc power supplies. As shown in the figure, current requirements may vary widely based on the way the equipment is connected to the power bus.
Agilent E4370A
MCCD (256 channels)
Agilent E4370A
MCCD (256 channels)
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| 133 |
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| 133A _ |
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87A |
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Power Source (24 V @ 133 A)
Power Source
(24 V @ 133 A)
+ -
maximum 
charging current = 266A
maximum discharging current = 174A
charging = 133A |
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charging = 133A |
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discharging = 174A |
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Powerbus Load
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charging = 133A discharging = 87A
+
Agilent E4370A
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Flexible Wires
Agilent E4371A
Powerbus Load
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charging = 133A discharging = 87A
+
MCCD (256 channels)
Agilent E4370A
Rigid Bars
MCCD (256 channels)
_
Flexible Wires
STAR CONFIGURATION | BUS BAR CONFIGURATION |
Figure 2-1. Typical Power Bus Configurations
29
