Voltage Drop Calculator

Low voltage lighting allows for small fixtures, efficient lamping, and safe installation and adjustment. The Voltage Drop Calculator will determine the correct THHN wire sizes for recommended 3% or less drop in voltage for each circuit based on the specified wattage. Lengths are the distance from the remote magnetic transformer to that system power feed connector, or power supply.

12V 24V
Size of Copper Gauge Wire
Range (In Feet)