3/0 AWG marine grade battery cable features flexible, tinned copper stranding which is ideal for your boat wiring needs. Our marine wire is made in the USA and meets ABYC and US Coast Guard specifications while UL listed as UL1426 Boat Cable. The maximum allowable amperage of single conductor 3/0 AWG marine grade battery cable is 385 amps outside of engine spaces and 327 amps inside the engine space.