Ancor Marine Grade cable is designed for the harsh marine environment.Ancor Marine Grade wire products are the longest lasting and most rugged available, exceeding UL 1426, ABYC and US Coast Guard Charter boat (CFR Title 46) standards. They are constructed with premium vinyl insulation that 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. Highest quality ultra flexible (Type 3) tinned copper stranding provides maximum protection against corrosion and electrolysis while resisting fatigue due to vibration and flexingVibration is always present on a boat, and will quickly fatigue and crack coarsely stranded wire. Ancor wire is Type 3 stranded, meaning that is has 5-10 times more copper strands than Type 2 wire, making it more flexible and fatigue resistant. It is based on AWG (American Wire Gauge) wire sizes, which are 6-12% larger than SAE gauge wire. So you get more current-carrying ability than from similar SAE wire.Marine Grade CableUltra flexible (Type 3) stranding resists fatigue due to vibration and flexingProprietary premium vinyl insulation stays flexible even in extreme cold (-40C)Resists salt water, battery acid, oil, gasoline, ultraviolet radiation, heat and abrasionExclusive insulation is rated at 600 volts, 105C dry and 75C wetExceeds all UL 1426, US Coast Guard Charter boat (CFR Title 46) and ABYC standardsAncor Primary Wire Bulk Spools ChartWire Flexibility ExplainedWire flexibility is influenced by two major factors: wire strand size and jacket hardness.Wire strand size has the largest impact on overall wire flexibility. As individual wire strand size decreases, wire flexibility increases. For boat cable, UL 1426 requires at least 19 individual strands for cables 16 AWG and larger. Amcor wire uses Type 3 stranding, which consists of individual 30 AWG (0.010") strands, regardless of the wire gauge. Ancors 16 AWG wire consists of 26 individual strands, while the 4/0 AWG wire consists of 2,109 individual strands.Jacket hardness is most commonly measured by