The inner conductors are correctly color-coded to ABYC standards, yellow and red. Ancor recommends yellow wire as DC negative because black is the standard color for AC hot. Manufactured from individual copper strands and tinned to perform in the harshest marine environments. Ultra-flexible Type 3 stranding resists fatigue from vibration and provides added corrosion protection. Exceeds all UL 1426, US Coast Guard Charter boat (CFR title 46) and ABYC standards. The premium vinyl insulation is rated at 600 volts, 105 deg. C dry and 75 deg. C wet, stays flexible even in extreme cold (-40 deg. F C) and resists salt water, battery acid, oil, gasoline, heat, abrasion and ultra-violet radiation.