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83-507-5002 Rev. B
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2. Wire size should be selected to enable voltage drop per lead to be less than 1.0V at the
rated current. Although units will compensate for up to 5V in each load wire, it is recom-
mended to minimize the voltage drop (1V typical maximum) to prevent excessive output
power consumption from the power supply and poor dynamic response to load changes.
Please refer to Tables 3-2 and 3-3 for minimum wire length (to limit voltage drop) in
American and European dimensions respectively.
Maximum length in Feet to limit
voltage drop to 1V or less
Wire size
AWG
Resistivity
OHM/1000ft
5A 10A 20A 50A 150A
14 2.526 80 40 20 8 2
12 1.589 120 60 30 12 3.4
10 0.9994 200 100 50 20 6
8 0.6285 320 160 80 32 10
6 0.3953 500 250 125 50 16
4 0.2486 800 400 200 80 26
2 0.1564 1200 600 300 125 40
0 0.0983 2000 1000 500 200 68
Table 3-2: Maximum wire length for 1V drop on lead (in feet)
Maximum length in meters to limit
voltage drop to 1V or less
Cross sect.
area
(mm²)
Resistivity
OHM/Km
5A 10A 20A 50A 150A
2.5 8.21 24.0 12.0 6.0 2.4 0.8
4 5.09 39.2 18.6 9.8 4.0 1.4
6 3.39 59.0 29.4 14.8 5.8 2.0
10 1.95 102.6 51.2 25.6 10.2 3.4
16 1.24 160.0 80.0 40.0 16.0 5.4
25 0.795 250.0 125.0 62.0 25.2 8.4
35 0.565 354.0 177.0 88.0 35.4 11.8
Table 3-3: Maximum wire length for 1 V drop on lead (in meters)
For currents not shown in Table 3-2 and 3-3, use the formula:
Maximum length=1000/(current x resistivity)
Where current is expressed in Amperes and resistivity in ohms/km or ohms/1000ft.
3.9.3 Wire termination
The wires should be properly terminated with terminals securely attached. DO NOT use untermi-
nated wires for load connection at the power supply.
CAUTION
When local sensing, a short from +LS or +S to -V or -S or -LS,
will cause damage to the power supply. Reversing the sense
wires might cause damage to the power supply in local and
remote sensing. (Do not connect
-
S to +V or +S to
-
V).