I was in the market for pain old 14 AWG wire for a project when I came across spools of wire being sold as "tinned marine grade wire". I was curious to know what made this wire "marine grade". From this page, it turns out, marine grade wire is
- 12% bigger for a given wire gauge. So 14G marine wire is thicker than regular 14G wire
- Each strand of the wire is finer and individually coated with tin, making it resistant to corrosion
- The insulation on the wire is oil, moisture and heat resistant.