I thought this you be usefull to some of us that like to DIY stuff. Below is a link to a chart on what size wire you would need for load vs distance vs voltage drop. The 2nd link is marine color code. 😉
https://www.defender.com/pdf/voltage-drop-data.pdf
https://www.defender.com/pdf/marine_color_code.pdf
https://www.defender.com/pdf/voltage-drop-data.pdf
https://www.defender.com/pdf/marine_color_code.pdf