Ancor Marine Grade 14 AWG Primary Wire. Ancor Marine Grade 14 AWG Primary Wire is manufactured from tinned copper stranding for maximum protection against corrosion and electrolysis which is essential in any marine wiring application. Ultra flexible Type 3 stranding resists fatigue due to vibration and flexing. Ancor's exclusive premium vinyl insulation stays flexible in extreme temperatures and is designed to lock out moisture, battery acid, oil, gasoline, and UV (ultra-violet) radiation, and rated to 600 volts.