12 Volt Wiring Size Quick Reference

Name: 12 Volt Wiring Size Quick Reference
Brand: The Boat Galley
SKU: TBG-12V
Price: 9.18 USD
Availability: InStock
Rating: 4.80 (5 reviews)

Quickly find the right wire size to keep equipment running smoothly and safely • 3% and 10% voltage drop tables for both regular and engine room applications

$9.18 USD

Sale SOLD OUT

Material Ultra-durable waterproof greaseproof paper

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Shipping and Returns

Free shipping on orders over $60 • $3 flat rate for packages under 1 lb

Discounted shipping for orders over 1 lb but under $60

Orders ship same day if placed by 2 PM ET (Mon–Fri, except holidays)

90-day free, no-hassle returns

Know You’re Using the Right Wire Size Every Time

Avoid the risks of undersized wiring, which can damage equipment or cause fires. The 12 Volt Wiring Size Quick Reference ensures you always choose the correct wire size for any 12V project. No need for internet access or bulky manuals—this guide gives you certainty at a glance.

Covers both 3% and 10% voltage drop tables for accurate sizing
Includes tables for regular and engine-room installations
Large, easy-to-read charts with shaded lines for quick look-ups
Durable, waterproof, and grease-proof paper stands up to tough environments
Compact design perfect for toolboxes, lockers, or workbenches

How to Use • Step-by-Step with Pictures

Includes More Than Just Wire Sizes

Wiring connector sizes and color codes
Battery state of charge chart
Simple formulas for watts, amps, and volts

Made in USA • Built to Last • Environmentally Friendly

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. Tough enough to handle life on a boat, it won’t tear, degrade, or smear, even in humid or greasy conditions.

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Our Guarantee

At The Boat Galley, we have one mission: to help you cruise with confidence.

As liveaboard cruisers, we understand the challenges and questions that come with boat life. That’s why we create practical products and courses designed to tackle the same issues we’ve faced ourselves—making your life on the water easier, safer, and more enjoyable.

Try our products and courses for yourself. If they don’t make your boat life better, use our 90-day FREE no-hassle return guarantee.

Raved About By TheatreCat . . .

"Very handy to have onboard for quick reference."

Verified Purchaser, 12 Volt Wiring Size Quick Reference

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Where You’ve Seen Us

Meet The Boat Galley Team

At The Boat Galley, we’re all cruisers. We know the joys—and the challenges—of boat life. The steep learning curve, costly mistakes, and hours spent searching for answers can be overwhelming. We’ve been there. That’s why we’ve created practical tools, trusted resources, and real-world guides to help you skip the frustrations and focus on enjoying your cruising life.