To help you determine the correct wire size for all your DC circuits use this online wire gauge calculator.
Enter the electrical appliances, their current draw and the length of their cable runs. We’ll calculate the correct gauge in AWG and mm² along with any fuses, switches and relays needed.
The calculator provides a complete parts and tools list too so you don’t have to figure out the standard wire sizes to use throughout your van’s conversion.
Graham is a seasoned marine electrical engineer with two decades of experience designing customized electrical systems for plant machinery and converting campers and overland vehicles. His expertise has led him to author the reputable Campervan Electrics Handbook and become the chief designer of the RV Wiring Design Tool. As a knowledgeable figure in the field, his YouTube channel, blog, Facebook group, and newsletter, offering electrical advice and product reviews, reach more than a million users each year.
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