Wire Gauge Tool
Estimate a better cable size before voltage drop turns into a visibility problem
This tool compares common cable sizes against your load and distance so you can choose a more realistic starting gauge for a homeowner-scale low-voltage layout.
Good For
Long path-light runs, front-yard zones, and any plan where cable length is a real variable.
Decision It Helps
Whether 12 AWG is enough, or if the run really wants 10 AWG or heavier.
How To Use It
Enter an honest run distance and load estimate, then compare how each gauge performs.
Interactive Calculator
Estimate the wire gauge that keeps the run under control
Start with the expected load, transformer voltage, and one-way run length. Then choose how much voltage drop you are willing to tolerate and the tool will recommend a gauge.
Recommendation
Split the run or lower the load
Even 8 AWG is above the allowed drop target here. Split the run, reduce load, or shorten distance.
Gauge Comparison
See how each cable size behaves on the same run
Run length
240 ft circuit
Planning target
5.0% max drop
Best use
Helpful when you know approximate load and want a better cable starting point.
Practical note
This is a homeowner planning aid, not an electrical stamp. Branching layout, tap settings, and future expansion still affect the final cable choice.