Wire Gauge Battery Cable Size Chart

Automotive wire and cable.

Wire gauge battery cable size chart. The dashes represent currents which cannot be handled by the wire size. Wire cross sectional area calculations. If a device says it uses 120 watts then 120 watts 12 volts 10 amps. Your figuring is correct.

Battery cableis used to power your electrical system and is sized according to the american wire gauge or awg for short specification for electrically conductive cables. 4 gauge wire should be protected by a fuse anywhere from 75a to 125a in size. 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. Tim the fuse at the battery is there to protect the wire and your car in the event of a short circuit.

On the left locate the current you will be dealing with either array or load current 2. Wire sizing chart 12 volt system. A n kcmil 1000 d n 2 0 025 in 2 92 36 n 19 5. The wire size listed in the graph at the intersection denotes the gauge of wire to use.

As far as i know these values are valid as of today. The following maximum amps versus cable size awg come from the nec version 2011. You can use 100a fuse at the battery and a 60a for the sub amp and 40a for the 4 channel. Our battery cable is american made and comes in gauge awg sizes of 6 4 2 1 1 0 2 0 3 0 and 4 0 with 6 gauge being the smallest and 4 0 gauge being the largest.

D n mm 0 127 mm 92 36 n 39. In this case simply divide the number for watts by your system s voltage to get the amperage requirements. The fine stranded wire will pass more amperage than course stranded wire that has a lower strand count. Sae wire gauge size and amperage for a d c.

Battery cable 6 gauge to 4 0 awg. Battery cable 6 gauge to 4 0 awg. Actually for my current installation i ve sized all of my dc cables to meet the 175 amp worst case scenario. Cable size ampacity chart.

Find the current consumption of the load on the horizontal axis of the chart. The n gauge wire diameter d n in millimeters mm is equal to 0 127mm times 92 raised to the power of 36 minus gauge number n divided by 39. Voltage system allowing a 20 voltage drop. The second thing to consider when selecting the correct size battery cable is the length of cable you need.

So all interconnecting cables are 2 0 based on the chart below. Move up to locate size of wire to be used. The n gauge wire s cross sercional area a n in kilo circular mils kcmil is equal to 1000 times the square wire diameter d in inches in. See adjacent charts 25 coils 100 coils or oem reels length depends on awg please consult a sales representative for 80 1434 03082reel dimensions battery cable load charts length to load these charts will show length in feet.