Agilent Technologies E4374A 6. Ampacity and Resistance of Stranded Copper Conductors, AWG No

Models: E4374A E4371A E4370A

1 141
Download 141 pages 7.46 Kb
Page 29
Image 29
Table 2-6. Ampacity and Resistance of Stranded Copper Conductors

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)

 

 

 

 

 

 

+

+

 

 

3

3

A

_

 

1

 

 

 

 

 

 

 

 

133

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

/87

 

 

 

 

 

_

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+

 

+

 

 

 

 

133A _

 

_

 

 

 

 

+

 

 

 

 

 

87A

 

 

 

 

 

 

/

 

 

 

 

 

 

A

 

 

 

 

1

 

3

 

 

 

 

7

 

3

 

 

 

 

 

1

 

 

 

 

4

 

Terminal

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

 

 

Block

 

 

 

 

 

Power Source (24 V @ 133 A)

Power Source

(24 V @ 133 A)

+ -

maximum AWG No. charging current = 266A

maximum discharging current = 174A

charging = 133A

 

 

 

+

Power Source

 

 

 

 

_

(24 V @ 133 A)

 

charging = 133A

 

 

 

 

+

Power Source

 

 

 

 

 

_

(24 V @ 133 A)

discharging = 174A

 

 

 

 

 

+

Agilent E4371A

 

 

 

 

 

 

Powerbus Load

_

charging = 133A discharging = 87A

+

Agilent E4370A

_

+

 

_

Flexible Wires

Agilent E4371A

Powerbus Load

_

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

Page 29
Image 29
Agilent Technologies E4374A, E4370A, E4371A 6. Ampacity and Resistance of Stranded Copper Conductors, AWG No, Area in mm2