American Wire Gauge (AWG)

What is American Wire Gauge (AWG)?

American Wire Gauge (AWG, sometimes called the Brown & Sharpe wire gauge) is the standardized wire gauge system used to measure the size of electric conducting wire in the United States since 1857. AWG refers to wire made with a solid metal core. It is represented as a simple number that is calculated by finding the radius of the wire, squaring that number, and multiplying it by pi (AWG = πr²). The smaller the number is, the thicker the cable will be.

Stranded wire is also commonly referred to using AWG, but it a little more complex. Because standard cables are made using multiple wires instead of a single solid core, they can be given multiple numbers. For example, a cable called “24 AWG (7x32)” means that the overall outer diameter is 24 AWG but on the inside, the cable has seven 32 AWG wires.

Common Wire Gauges

Certain types of cables will always be the same AWG. For example, RG58 cable is always made as a 20 AWG cable regardless of manufacturer. Coax cables tend to be the same size across the board with different connectors made for the different kinds of cables. There are a few exceptions, such as cables with Quad Shielding being a little thicker and needing special connectors, but these are few and far between.

On the other side of that, there are some cables that come in different variants and as a result, can have different AWGs. Ethernet cable is a prime example for this. Standard ethernet cable is typically 23 or 24 AWG from most manufacturers. However, you also have versions like

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