Wire Termination - TDK-Lambda GENESYS 750W HALF RACK Technical Manual

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.
Wire size
AWG
14
12
10
8
6
4
2
0
Table 3-2: Maximum wire length for 1V drop on lead (in feet)
Cross sect.
area
(mm²)
2.5
4
6
10
16
25
35
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.
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).
Resistivity
OHM/1000ft
2.526
1.589
0.9994
0.6285
0.3953
0.2486
0.1564
0.0983
Resistivity
OHM/Km
8.21
5.09
3.39
1.95
1.24
0.795
0.565
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)
Maximum length in Feet to limit
voltage drop to 1V or less
5A 10A
80 40
120 60
200 100
320 160
500 250
800 400
1200 600
2000 1000
Maximum length in meters to limit
voltage drop to 1V or less
5A 10A
24.0 12.0
39.2 18.6
59.0 29.4
102.6 51.2
160.0 80.0
250.0 125.0
354.0 177.0
CAUTION
19
83-507-5002 Rev. B
20A 50A
20 8
30 12
50 20
80 32
125 50
200 80
300 125
500 200
20A 50A
6.0 2.4
9.8 4.0
14.8 5.8
25.6 10.2
40.0 16.0
62.0 25.2
88.0 35.4
150A
2
3.4
6
10
16
26
40
68
150A
0.8
1.4
2.0
3.4
5.4
8.4
11.8