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Guides and deep dives on wire sizing, gauges and voltage drop.
Gauges & conversion
October 22, 2026
Copper wire gauge chart: reading resistance like a sizing expert
The copper wire gauge chart's resistance columns hold the whole story: Ω/1000 ft per gauge, the doubling patterns, temperature shifts, and worked examples for panels, speakers and long DC runs.
October 21, 2026
Thickness at a glance: how to use an actual size wire gauge chart
An actual size wire gauge chart prints wire diameters true to scale — hold wire against the page and read your gauge. Plus mm equivalents, why strands read thinner, and printing tips for a true 1:1 match.
October 18, 2026
Solid vs stranded wire: construction, flexibility and the terminals rule
Solid and stranded wire share gauge numbers but behave differently. Strand classes, spring-out terminations and where each construction belongs.
October 16, 2026
Speaker wire gauge guide: match the size to the run, not the price tag
How to pick speaker wire gauge with two numbers — speaker impedance and run length — plus the damping-factor math that makes 16, 14 and 12 AWG different.
October 14, 2026
How to measure wire gauge — calipers, coins and charts
Practical methods to identify wire gauge with calipers, a card gauge or printed coins, including the stranded-wire caveat that trips everyone.
October 6, 2026
AWG vs metric: every odd-size question, answered with mm²
Metric countries size wire in mm², North America uses AWG. A conversion table, the logic behind nearest-size matching, and when to round up.
Cars, RV & solar
October 20, 2026
12V DC wire gauge chart: how far each size can go before voltage drop wins
A practical 12V DC wire gauge chart on distance: worked runs at 14, 12, 10 and 8 AWG for lights, pumps, fridges and inverters, with the amps × feet math and the fuse rules that protect the cable.
October 20, 2026
12V automotive wire sizing — ohms per foot is your whole world
In a 12 V vehicle, voltage drop decides wire size long before ampacity does. Worked examples for headlights, inverters and starter-class loads.