I am working on an electrical installation in a truck which will operate as a mobile office.
I am wondering if it is possible to only route a 12V positive wire, and use the chassis for ground? Basically to save on cable costs.
Typically a car battery has its negative terminal connected to the chassis. Which to me suggests that the chassis has capacity for high currents. But I'm not sure if that is also valid for continuous load, e.g. at 100A, and whether this would work at longer lengths, e.g. 4-6 meters.
I'm wondering if the chassis will have too much resistance or other problems. The vehicle will be turned off, so I'm assuming noise won't be a problem.