What is one noticeable difference between 120V AC and 12V DC RV wiring?

The distinction between 120V AC and 12V DC RV wiring often comes down to the type of wire used, specifically in regards to whether it is stranded or solid. In RVs, 12V DC circuits typically utilize stranded wire. This is because stranded wire is more flexible and easier to work with in various applications, particularly in environments where bending and vibration are common, such as in recreational vehicles.

On the other hand, 120V AC wiring can utilize solid wire, which is often used in places where the wire runs are fixed and less subject to movement. The flexibility of stranded wire for 12V systems allows for easier installation, especially in confined spaces, as it can easily navigate around corners and bends without breaking.

While factors such as wire size and insulation color may also differ between 120V AC and 12V DC wiring, the characteristic nature of the wire itself—stranded for 12V DC—provides a clear and functional difference that is essential for RV technicians to recognize.