Choosing the correct wire size for your project

Question:

Hi Jeff,

I'm about to rewire my boat. The question is: Is it possible to use 70m2 for all my bigger wiring jobs. Battery to motor, battery to busbars, busbars to switch panels. Insted of having to buy a little bit 50m2 and so on. it´s cheaper to buy at bigger roll of 70m2 wire than several small different ones, and then having the risk of ending up with useless leftovers. Thanks a bunch for realy inspiring videos and the hopfully, nowlegde to do things right.
All the best, Kristian