Beginner Level: Wire Gauge

How to Read This Table

These current figures are quick-reference numbers, not universal guarantees. Real safe capacity changes with cable material, insulation, run length, ambient temperature, and acceptable voltage drop.

When in doubt, size up rather than down, especially on main power runs feeding amplifiers with real bass demand. A larger cable usually costs less than the damage caused by heat, clipping, or voltage sag.

Quick Rule

If amplifier power, cable length, or future upgrade plans put you on the edge between sizes, choose the thicker cable and fuse for the wire, not the wishful load.