When connecting a power supply to a load, it is very important to use wires that are appropriate for the voltage and current.
If it is difficult to prepare thick wires for a large current, you can use multiple thin wires instead.
However, in that case, you must be careful to use the same wires, the same length, and the same contact resistance.
Extracted from "Installation of DC Power Supply and remote sensing correctly and safely - CONNECTION OF LOAD"
CONNECTION OF LOAD
Your power supply's stability and ripple noise will be directly affected by its wiring and grounding.
• Use wires thick enough for your application. Use as short a length as possible.
• Select PVC electric wire (105°C) of the proper voltage rating
Current curring capacity of electric wire, maximum length limited by maximum voltage compensation by remote sensing (0.5V/each way) have to be considered when connecting to the load. See below table to determine the proper gauge of the wire.
| AWG | mm2 | Max. current [A] |
|---|---|---|
| 18 | 1.1 | 2 |
| 16 | 1.3 | 7 |
| 14 | 2.1 | 11 |
| 12 | 3.3 | 18 |
| 10 | 5.3 | 23 |
| 8 | 8.4 | 39 |
| 6 | 13 | 67 |
| 4 | 21 | 106 |
| 2 | 33 | 170 |
| 1 | 42 | 209 |
| 1/0 | 53 | 270 |
| 2/0 | 67 | 330 |
| 3/0 | 85 | 350 |
• When connecting multiple loads in parallel, connect to each load
Good
Proper Connection
Not Good
Improper Connection
There will be a larger voltage drop at loads 2 and 3. The ripple at those loads will also increase due to the current of each load.
• When connecting to a dielectric load, use a diode with a rating larger than the output voltage and current of the power supply as shown in the diagram below. This diode will protect the power supply from a voltage kickback from the load.
• Connecting a circuit that involves discharge or short circuit may shorten the service life of the product and cause it to fail. When connecting to a circuit where discharge or short circuit may occur, install a protective resistance at the output.
In addition, to fully utilize the original performance of a DC power supply, it is important to properly connect and ground it.
Please also see the Technical Knowledge on our website, "Installation of DC Power Supply and remote sensing correctly and safely".
*Failures or malfunctions of the power supply caused by connection to a load are not covered by the warranty.