How To Wire LED Power Supply
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LED power supply wiring method
The wiring method of LED power supply needs to be selected according to the specific scenario (such as single lamp, multiple lamps in series/parallel, using a driver, etc.) and the type of power supply (constant current or constant voltage). The following are common wiring methods and precautions:
1. Basic wiring method
Single lamp direct wiring
The positive pole (usually red wire) is connected to the positive pole of the power supply, the negative pole (black wire) is connected to the negative pole of the power supply, and the control line (white or other colors) can be connected to the controller or left floating.
If there is a current limiting resistor, the resistor needs to be connected in series to the negative pole line.
Multiple lamps in series
The positive poles of multiple LEDs are connected in sequence, and the negative poles are the same, and finally the whole is connected to the power supply.
Advantages: The current is consistent and the brightness is uniform; Disadvantages: Any open circuit of any lamp will cause all to go out.
Multiple lamps in parallel
All positive poles are connected in parallel to the positive pole of the power supply, and the negative poles are connected in parallel to the negative pole of the power supply.
Advantages: The failure of a single lamp does not affect other lamps; Disadvantages: Uneven current distribution may shorten the life of some LEDs.
Hybrid (series + parallel)
First connect the groups in series, then connect the groups in parallel to balance reliability and brightness.
2. Wiring of the driver
Constant current driver: Suitable for series LEDs, stable current, single lamp short circuit does not affect other lamps, but open circuit will cause all lamps to go out.
Constant voltage driver: Suitable for parallel LEDs, voltage matching must be ensured, single lamp short circuit may cause circuit failure.
Wiring steps: The positive and negative poles of the driver correspond to the positive and negative poles of the LED, and the control line is connected to the controller to achieve dimming/color adjustment.
3. Precautions for high-voltage (220V) power supply wiring
"Single" connection: When multiple switching power supplies are connected in series, long distances will cause voltage drop and cable overheating risks. It is recommended not to exceed 24 200W power supplies.
"T" connection: Connect the 220V power supply from the middle and connect it in two groups to reduce voltage drop and load pressure, which is safer.
IV. Safety Recommendations
Use national standard cables to avoid overload (e.g. 2.5mm2 copper wire has a current carrying capacity of 28A).
Test voltage stability before installation and avoid using non-standard accessories.
