12 Volt Wire Gauge Calculator. Conductor sizes AWG related to maximum current through a 12V electrical copper wire and length of cable - are indicated below. Use the calculator above to size wire for basic applications or view some of the wire ampacity charts for wire ampacity values.
Choosing the correct wire A Locate the CURRENT IN AMPS of your appliance across the top of. Need to know how thick a cable needs to be for a solar panel fridge battery or motor. A lower rating will decrease the current-carrying capacity of the wire.
To use the chart included with this technical brief follow the instructions below.
In a 12V system with maximum 2 voltage drop - and current 10 amps - the maximum total length of the wire back and forth can be calculated with Ohms law. In a 12V system with maximum 2 voltage drop - and current 10 amps - the maximum total length of the wire back and forth can be calculated with Ohms law. The wire sizing guide below provides the minimum wire size needed to limit voltage drops to 5 at a given distance in a 12V or 24V system. If the wire gauge is OK to use it will have a Check Mark on the same line.
