16
Table 3-2: Maximum wire length for 1V drop on lead (in feet)
Maximum length in Feet to limit
voltage drop to 1V or less
Wire size
AWG
Resistivity
Ω/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 3-3: Maximum wire length for 1V drop on lead (in meters)
Maximum length in meters to limit
voltage drop to 1V or less
Cross sect.
Area
(mm
2
)
Resistivity
Ω/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
For currents not shown in Table 3-2 and 3-3, use the formula:
Maximum length=1000/ (current x resistively)
where current is expressed in Amperes and resistively in ohms/km or ohms/1000ft.
3.9.3 Wire termination
The wires should be properly terminated with terminals securely attached. DO NOT use
unterminated 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.)
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