Voltage Drop Calculation Using American Wire Gauge

Example #1. one power supply per module (3x power supplies): A 18 AWG wire will drop 0.042 V/ft at 2.6

A at maximum ambient temperature. Using 100 feet between the QuickTrip and the power supply would

provide a voltage drop of 100×0.042 = 4.2V.

Example #2. one power supply for all three modules (1x power supply): A 18 AWG wire will drop 0.125

V/ft at 7.8 A at maximum ambient temperature. Using 100 feet between the QuickTrip and the power

supply would provide a voltage drop of 100×0.125 = 12.5V.

It is very important to ensure the voltage at the QuickTrip’s input terminal is within the product power

input specification to achieve maximum performance.

Extended Power Input

The Power Wiring Requirements section above specifies the maximum length of 30 meters between the

power source and the QuickTrip. Installations that require a longer power cable run also require a much

larger wire gauge to account for voltage drop. Figure 3-6 below gives a possible solution for installations

required to run at longer distances.