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Waterproof • Greaseproof

12 Volt Wiring Size Quick Reference

12 Volt Wiring Size Quick Reference

Designed to be kept onboard in your tool box

Regular price $5.92 USD
Regular price $5.92 USD Sale price $5.92 USD
FREE US Shipping Orders $40+ • $2 US Shipping If Under 1 Pound • 30-Day Free No-Hassle Returns

✔ Qualifies for $2 shipping

✔ Shipped same day if ordered before 2 PM EST M-F

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Our Guarantee

At The Boat Galley, we have only one mission: to make boat life better.

Everyone on The Boat Galley team is a liveaboard cruiser and we understand the challenges that come with life on a boat. When our team encounters frustration, we come up with practical and innovative solutions.

This is how we came to radically reinvent the cruising guide, how we developed better reference materials, and how we created affordable, in-depth online courses that help us share our extensive knowledge with you at your pace.

Try our products and see. If they don't make your boat life better, use our 30-day FREE no-hassle return guarantee.


  • Easier and faster to use than leafing through thick electrical manuals
  • No need for an internet connection to Google wire sizes
  • Shaded lines and large print make look-ups easy
  • Clearly labeled sections and no tiny print
  • Printed on durable, heavy-duty, waterproof, and grease-proof paper that can confidently be stored in toolboxes, work benches, and tool lockers


  • When to use 3% or 10% tables
  • Wiring connector sizes/colors
  • Battery state of charge
  • How to calculate watts, amps, and volts
Made in USA

Designed in the USA; printed in the USA on American-made recyclable synthetic paper using environmentally-friendly soy-based inks at a facility that is completely wind-powered. Minimal packaging.

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Customer Reviews

Based on 3 reviews

Always good to keep in your engine room, Or toolbox

Robert A.

Save your money and just google and print any # of similar charts.


Very handy to have onboard for quick reference.