Voltage Drop Formula [2021] Review

Copper conducts better than aluminum, resulting in less drop for the same thickness.

can burn out because they draw more current to compensate for the lower voltage. LEDs and Lights will flicker or appear dim. Electronics may reboot or fail to start. Heat builds up in the wiring, which can be a fire hazard.

VD=2×K×I×LCMcap V cap D equals the fraction with numerator 2 cross cap K cross cap I cross cap L and denominator cap C cap M end-fraction Voltage Drop (in volts). voltage drop formula

A constant representing the current traveling out and back (the full loop). K: Direct Current Specific Resistance. For Copper, ; for Aluminum, I: Load Current (in Amps). L: Length of the wire (one-way distance in feet).

This is the most common solution. Moving from 12 AWG to 10 AWG significantly reduces resistance. Copper conducts better than aluminum, resulting in less

If possible, route the conduit in a more direct path to save footage.

If your starting voltage is 120V, a 7.9V drop is about 6.5% . This exceeds the recommended 3% limit, meaning you should likely upgrade to a thicker wire (like 10 AWG). Factors That Affect Voltage Drop Electronics may reboot or fail to start

Thicker wires (lower AWG numbers) have less resistance and lower voltage drop.