Wire Ampacity Standard Wire Gauge Current Rating Pdf

American wire gauge awg also known as the brown sharpe wire gauge is a logarithmic stepped standardized wire gauge system used since 1857 predominantly in north america for the diameters of round solid nonferrous electrically conducting wire.

Wire ampacity standard wire gauge current rating pdf. 1 current ratings for up to 1000 v pvc insulated single and multicore wiring cables ambient temperature up to 30 o c the higher the gauge number the smaller the diameter and the thinner the wire. In the metric gauge scale the gauge is 10 times the diameter in millimeters so a 50 gauge metric wire would be 5 mm in diameter. The larger the awg number or wire guage the smaller the physical size of the wire. The higher the gauge number the smaller the diameter and the thinner the wire.

120 240 volt 3 wire single phase service entrance conductors service lateral conductors and feeder conductors that serve as the main power feeder to a dwelling unit and are installed in raceway or cable with or without an equipment grounding conductor. For application of this section the main. Note that in awg the diameter goes up as the gauge goes down metric is the opposite. Rancho dominguez 2050 e.

As you might guess the rated ampacities are just a rule of thumb. The smallest awg size is 40 and the largest is 0000 4 0. Metric wire gauges see table above metric gauge. The cross sectional area of each gauge is an important factor for determining its.

Wire is sized by the american wire gauge awg system. Standard wire cable co. Dimensions of the wires are given in astm standard b 258. Common sizes include 14 12 10 8 6 and 2 gauge wire.

Probably because of this confusion most of the time metric sized wire is. Because of less electrical resistance a thicker wire carries more current with less voltage drop than a thinner wire. American wire gauge conductor size table american wire gauge awg is a standardized wire gauge system for the diameters of round solid nonferrous electrically conducting wire. Wire gauge refers the physical size of the wire rated with a numerical designation that runs opposite to the diameter of the conductors in other words the smaller the wire gauge number the larger the wire diameter.