Getting Started 25
4.3 Input Connection
It is recommended to use the proper wire and lug for the load wiring. The following factors are needed
to take into consideration:
• Insulation rating of the wire
• Current carrying capacity of the wire
• Noise and impedance eects of the load lines
• Maximum load wiring length for remote sense operation
4.3.1 Current Carrying Capacity
As a minimum, load wiring must have a current capacity greater than the output current rating of the
power source. This ensures that the wiring will not be damaged even if the load is shorted.
Table 4.3.1shows the maximum current rating, based on 450 A/cm², for various gauges of wire rate for
105°C operations. Operating at the maximum current rating results in an approximately 30°C temperature
rise for a wire operating in free air.
When load wiring must operate in areas with elevated ambient temperatures or bundled with other wiring,
use larger gauges or wiring rated for higher temperature.
Wire Size
AWG
2/0
1/0 1 2 4 6 8 10 12 14
Max.
Current(A)
303
247 192 155 97 61 36 21 16 10
Table 4.1 Current Carrying Capacity
Hazardous voltages may exist at the input terminals with a power
source output greater than 40V. To protect personnel against
accidental contact with hazardous voltages, ensure that the power
source and its connections have no accessible live parts. Ensure
that the load wiring insulation rating is greater than to the maximum
output voltage of the power source. And, use the input protection
cover.
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