1. Common Low Voltage (240V a.c. 50Hz) and Extra Low Voltage (12V a.c. 50Hz)
No polarization required (equivalent to parallel connection).
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2. Constant Current Driver (Power Supply)
Typical for 350mA and 700mA LED lighting. Serial Connection (polarization required) must be RED(+) connected to BLACK(-) and BLACK(-) to RED(+).

3. DC12V and DC24V Constant Voltage Driver (Power Supply)
Typical for LED Strip or Rope Lighting (i.e., LED Twister, Snake, Rule, etc.). Parallel Connection (polarization required), all RED(+) wires connected together and BLACK(-) wires with BLACK(-) wires together.
