Series 2268 850 Watt DC Power Supplies Reference Manual
Installation
2268S-901-01 Rev. A / January 2015
21
STEP 4: SELECTING LOAD WIRES
This section provides recommendations for selecting minimum load wire sizes.
Load Wiring
To select the wiring for connecting the load to the power supply, consider the following
factors:
•
Insulation rating of the wire. Current carrying capacity of the wire.
•
Maximum load wiring length for operation with remote sense lines.
•
Electrical noise and impedance effects of the load lines.
Insulation Rating
Use load wiring with a minimum insulation rating equivalent to the maximum output voltage
of the power supply.
Current Carrying Capacity
The load wiring must have a current carrying capacity greater than the output rating of the
power supply to ensure that the load wiring will not be damaged if the load is shorted. The
table that follows shows the maximum current rating for various gauges of wire rated for 105
°C operation, based on a maximum current density of 450 A/cm
2
.
Operating at the maximum current rating shown in the table below results in an
approximately 30 °C temperature rise for an appropriately-sized load wire operating in free
air. Where load wiring must operate in areas with elevated ambient temperatures or bundles
with other wiring, use larger gauges or wiring rated for higher temperatures.
Current Carrying Capacity for Load Wiring
Wire Size
(AWG)
Maximum
Current (Amps)
Wire Size
(AWG)
Maximum
Current (Amps)
20
2.5
6
61
18
4
4
97
16
6
2
155
14
10
1
192
12
16
1/0
247
10
21
2/0
303
8
36
n/a
n/a
Содержание Keithley 2268 Series
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