AWG is usually expressed in integers i.e., 1AWG, 2 AWG and so on. Gauge size of a wire is an important parameter used in measuring the current carrying capacity of a wire, which is also known as its Ampacity.ĪWG sets the diameter of a wire, which is often denoted as its Gauge. The American Wire Gauge is also known as Brown and Sharpe Gauge (B & S Gauge) and it is a logarithmic stepped gauge system. The American Wire Gauge (AWG) is one such standard that has been used since 1857 for measuring the diameter of an electrical conductor (usually round, solid and non-ferrous materials such as Copper and Aluminum). The American Wire Gauge (AWG)Ĭalculating the resistance of a particular length of wire for a certain wire diameter is highly impractical. For the above situation, an AWG 6 wire should be sufficient as it is rated for a maximum current of 55A at 60 0C. The Wire Size Chart lists out the ampacity of the wires as per its diameter. This is where the wire gauge chart comes handy. If the main wire that is responsible for supplying this current is not chosen properly, then the chances of fire or other damage are very high. How do you select the wire size?Īs the central AC is a powerful appliance, it draws significantly large amount of current. For instance, assume you are installing a new central air conditioner in your home and are trying to wire the AC unit. For a successful electrical installation, selection of the right wire size is very important. Common Wire Sizes and their ApplicationsĪny electrical infrastructure, whether it is in homes, offices, shops or even large commercial building, consists of wires and cables.
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