A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the power and signal connections between the devices.
Green Wire Ground. Never use a green wire for any purpose other than for grounding. Ground green insulated wires are sometimes used for grounding. Fuel tanks are required to be grounded.
Connecting this wire to the engine and dc negative on your boat will work great. The recommendations in table below are by wiles. Circuit ground green or bare wire with oven green or bare. However common practice per local electrical inspectors is for the first hot live or active wire to be black and the second hot to be red.
The purpose of the green wire is to provide a path to ground for a circuit s electric current if a live wire within the circuit happens to touch metal or some other conductive material.
These codes apply on both ac and dc power circuits. Bare stranded or flexible ec grade high purity copper iec 60228 is 8130 special pvc for earthing green yellow earth wire cable for grounding. It does not matter if the black and red wires are reversed with 240 volt oven wiring. What to do when there is nothing to attach the ground wire. Some 4 wire ovens do permit bonding the white neutral wire to the ground wire.