Maximum current (amps) in a 12V electrical circuit vs. size (AWG) and length of wire.
Wire Size - Area to Diameter Converter
Amplifier wire gauge chart
12 Volt Wire Size Calculator
Image result for length of wire and amps at 12 volt chart
12 Volt - Electric Automotive Wiring
Trailer battery charge AWG wire size>, Chevy Tahoe Forum
Choosing the Right Wire Size – Windy Nation Inc
Deleting Fuseable links - Ford Truck Enthusiasts Forums
Electrical Wire Gauge, Ampacity, and Wattage Load
Online Wire Size Calculators & Tables
12 Volt Wire Size Calculator