![]() ![]() SAE wire sizes are 6 to 12 percent smaller, carry proportionally less current, and have greater resistance AWG wire sizes, not SAE: All Ancor wire uses AWG wire sizes.Lower temperature insulation cannot handle as much current 105☌ insulation rating: All Ancor wire uses 105☌ insulation rating.This simple equation allows you to calculate the voltage drop for a circuit of any length and any current flow, if you know the resistance of the wire.įinally, note that the amp capacity (ampacity) of the wire curtails using very short lengths of wire for large current flows, as shown by the “flat tops” of the 10% chart areas. Voltage Drop = Current x Length x Ohms per foot We’ve included copper wire specifications which comply with the AWG standards at the bottom. The wire size listed in the graph at the intersection denotes the gauge of wire to use.Find the length of the circuit on the vertical axis of the chart, noting that the length is the round-trip distance from the panel or battery to the load and back.Find the current consumption of the load on the horizontal axis of the chart.Select either the 10% or 3% voltage drop chart, based on the type of load you are running.The simplest method we’ve found uses the charts below. Use the charts below to determine the correct wire gauge, based on the amount of current in the circuit and the length of the wire run.Įven the experts have to check occasionally on the correct gauge and ampacity (maximum amount of electrical current a conductor can carry) of wire for a given marine DC load. ![]() Marine grade wire is manufactured in multiple gauges for different applications. ![]()
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