This is probably the question I get most frequently. Sooner or later, building our beloved camper van, we always get to the point of wondering about the most suitable wire size for each power line. And that’s a good sign that we are doing things right! 😉
Cables not properly dimensioned can lead to voltage loss, excessive heating, and high risk of fire. So let’s go into the details. I will have to put some electrical formulas but I will try to explain everything in the simplest way possible.
If you are not interested in the entire technical explanation, you may go directly to the Ultimate Wire Sizing Formula and the Practical Examples below