Filter
Top Products
83
-
5
15
-
0
00
Rev.
B
19
3.9 CONNECTING THE LOAD
3.9.1
Load Wiring
Th
e following considerations should be made to select wiring for connecting the load to the power
su
p
ply:
Current carrying capacity of the wire (refer to Section 3.9.2)
Insulation rating of the wire should be at least equivalent to the maximum output volta
ge of the
power supply.
Maximum wire length and voltage drop (refer to Section 3.9.2)
Noise and impedance effects of the load wiring (refer to Section 3.9.4).
3.9.2
Current Carrying Capacity
Two factors must be considered when selecting the wire size:
1.
Wires shou
ld be at least heavy enough not to overheat while carrying the power supply load
current at the rated load, or the current that would flow in the event the load wires were
shorted, whic
h
ever is greater.
2.
Wire size should be selected to enable voltage drop p
er 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 recommended to
minimize the voltage drop (1V typical maximum) to prevent excessive output power consum
p-
tion from the power supply and po
or dynamic response to load changes. Please refer to T
a-
bles 3
-
2 and 3
-
3 for maximum wire length (to limit voltage drop) in American and European
dimensions respectively.
Maximum length in Feet to limit
voltage drop to 1
V or less
Wire size
AWG
Resistivity
OHM/1000ft
10A
20A
50A
100A
200A
400A
14
2.526
40
20
8
4
2
---
12
1.589
60
30
12
6
3
---
10
0.9994
100
50
20
10
5
2
8
0.6285
160
80
32
15
8
4
6
0.3953
250
125
50
25
12
6
4
0.2486
400
200
80
40
20
10
2
0.1564
600
300
125
60
30
15
0
0.0983
1000
500
200
100
50
25
Table 3
-
2: Maximum wire length for 1V drop on lead (in feet)
WARNING
Turn Off the AC input power before making or changing any
rear panel connection. Ensure that all connections are s
e-
curely tig
htened before applying power. There is a potential
shock hazard when using a power supply with a rated ou
t
put
greater than 40V.