Color-coded Polyvinyl Chloride (PVC), heat and moisture-resistant, flame-retardant compound per UL-1063 and UL-8 4 AWG THHN/THWN-2 Specifications*:

Table 1 lists the AWG sizes for electrical cables / conductors. In addition to wire size, the table provides values load (current) carrying capacity, resistance and skin effects. The resistances and skin depth noted are for copper conductors. A detailed description of each conductor property is described below Table 1. Diameter Notes:A mil is a unit of length equal to 0.001 inch (a “milli-inch” or a “thousandth of one inch”) ie. 1 mil = 0.001″. What about 12V and 24V batteries? If you use a 12 gauge wire with a 12V battery, you can get a maximum of 144 watts out of it. If you use the 24V battery, it’s double that; 288 watts.Somehow we don't see ourselves nonchalantly calculating this in our heads every time we speak with an American customer, so we've made up a conversion table which we'd like to share for your convenience. AWG # We’re going to simplify every wire’s characteristics (mm, mm2, amps) – from AWG 4/0 to AWG 40 gauge wire – in a systematic and concise easy-to-understand way. Example: Diameters (in mm) for AWG wires from 10 gauge wire to 28 gauge wire. You can consult the wire ampacity chart from the 1st Chapter and see that the most appropriate wire size for 25 amps is 12 AWG wire. Knowing it can handle 17 amps we can calculate that the 16 gauge wire has the capacity to handle 2,040 watts (at 120V) and 3,740 watts (at 220V). One of the most widely used high-amp wires is the 4 gauge wire. If you express the diameter of the 4 gauge wire in mm, you can 5.189 mm. This is the last AWG wire size with a diameter of over 5 millimeters.

Values for resistance are based on electrical resistivity for copper 1.724 x 10 -8 Ω m (0.0174 μΩ m) and electrical resistivity for aluminum 2.65 x 10 -8 Ω m (0.0265 μΩ m). Resistance Notes: The resistance noted in the table above is for copper wire conductor. For a given current, you can use the noted resistance and apply Ohms Law to calculate the voltage drop across the conductor. As we know, wattage or electrical power depends both on current (amps) as well as voltage. To answer how many watts can a 12 AWG wire handle, you also need to know the circuit’s voltage. You will find specific subchapters for AWG 4/0, 3/0, 2/0, 1/0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40 wires down below the AWG wire size chart, with mm, mm2, and amperage characteristic for every one of them. If you express the cross-section of a 12 gauge wire in mm2, you get 3.31 mm2. These diameter and cross-section figures are very useful because they determine how many amps can a 12 gauge wire handle.Commonly, when you refer to the size of a conductor, you talk about its cross-sectional area, which is expressed in mm2. To calculate the cross-section of solid round wires, you can use this formula: Similar to the 4/0 gauge wire, the 3/0 AWG gauge wire is used for welding and for drawing the current (and power) out of large 12-volt or 24-volt batteries. AWG Copper wire, 4 AWG THWN-2, 4 AWG Building Wire, hook up wire, conduit wire, lighting wire, nylon copper wire, construction cable, 4 Gauge Wire, etc... This allows it to carry a current of 35 amps at 75°C; this is the rated ampacity for a 10 gauge copper wire.

You can consult the wire ampacity chart from the 1st Chapter and see that the most appropriate wire size for 90 amps is 3 AWG wire. Electric resistance in wire made of Copper, Aluminum, Brass, Constantan, Nichrome, Platinum, Silver or Tungsten. Calculate the number of small circles that fits into an outer larger circle - ex. how many pipes or wires fits into a larger pipe or conduit.

American Wire Gauge (AWG) vs. cross sectional area converter.

In this AWG wire gauge chart for a standard copper wire, you can find every AWG wire; from the biggest 10+ mm wires (such as 4/0 AWG and 3/0 AWG wires) to the smallest below 0.01 mm wires like 39 and 40 AWG wires. You can consult the wire ampacity chart from the 1st Chapter and see that the most appropriate wire size for 80 amps is 4 AWG wire. Well, at standard temperature of 75°C, the 2 gauge wire has a 115 amps ampacity. That means that any 2 gauge copper wire can, at that temperature, handle up to 115 amps safely.

In most cases, however, we know how many amps we require for the AWG wire to handle, and want to work out the AWG wire for that amount of amps. The ampacity of the 8 gauge wire is exactly 50 amps at 75°C. That means that 8 gauge wire can indeed carry 50 amps at 220-volts. You can consult the wire ampacity chart from the 1st Chapter and see that the most appropriate wire size for 70 amps is 4 AWG wire. For wires that carry signals, such as video interconnect or audio hookup wires, the AWG is not as essential as it is for power wires. It is because the electrical signals in these wires have low power, and thus you do not need smaller AWG wires. Cable pair twisting and efficient shielding are more critical in these wires to maintain the integrity of the signals. We can calculate how many watts can a 14 gauge handle (using electric power equation P = I×V) by knowing two things:

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In the 1st Chapter, we focus on the wire gauge chart, denoting diameter (mm), cross-section (mm2), and amperage (maximum allowed amps) for each AWG wire. For example, 23 AWG 5/30 means a stranded wire of 5 strands of 30 AWG or 0.0509 mm2 which is equal to the 23 AWG or 0.258mm2. In short, 12 gauge wire can handle 25 amps; it has an ampacity of 25A at 75°C. It’s many times used as your go-to 20 amp size wire for a number of different applications. In the 2nd Chapter, we answer the most common question about AWG wire sizes. Namely, which wire is a 30 amp wire size, 50 amp wire size, 100 amp wire size, and so on. We cover all common wires that can handle as little as 10 amps to the big ones that can handle 200 amps.