# American Standard Wire And Cable Diameter Calculation Describes

- Nov 12, 2018-

Introduction of American Standard wire and cable diameter calculation

Conversion method of square number and diameter of wire

Wire specifications are commonly used internationally in three standards: American (AWG), British (SWG), and our (CWG).

A few squares are a nominal value stipulated by the national standard, and several squares are the user's choice of wire and cable according to the load of the wire and cable.

The square number of wire is a verbal term in the construction of decoration hydropower, often said that a few square wires are not added units, that is, square millimeters.

The square of the wire is actually marked by the cross-sectional area of the wire, that is, the area of the circular cross section of the wire, in square millimeters.

Generally speaking, the experience of power consumption is when the power grid voltage is 220V, the experience of each square wire load is about 1-kilowatt kilowatts.

Copper wire each square can be loaded with 1-1.5-kilowatt, aluminum wire per square can be loaded 0.6-1-kilowatt. Therefore, electrical appliances with a power of 1-kilowatt are sufficient with only one square of copper wire.

Specific to the current, short-range power transmission of the general copper wire per square can carry 3 A to 5 a of the current. The heat dissipation condition is good to take 5a/square millimeter, not easy to take 3a/square millimeter.

Wire and cable diameter square conversion method:

Knowing the square of the wire, calculating the radius of the wire is calculated by the formula for finding a circular area: the square number of wires (square millimeters) = circumference (3.14) x wire radius (mm)

Know the square of the wire, the calculation line diameter is the same, such as: 2.5 square wire diameter is: 2.5÷3.14 = 0.8, and then the square draw 0.9 mm, so 2.5 square line diameter is: 2x0.9 mm = 1.8 mm.

Knowing the diameter of the wire, calculating the square of the wire is also calculated by the formula for finding the circular area: the square of the Wire = π (3.14) of the X-ray diameter squared/4

Cable size is also nominal, multi-strand is the sum of the cross-sectional area of each wire.

Calculation formula for cable cross-sectional area: Square x Shares of 0.7854x wire radius (mm)

For example, 48 strands (0.2 mm per strand radius) 1.5 squared lines: 0.785x (0.2x0.2) x48 = 1.5 squared.

电线的规格在国际上常用的有三个标准：分别是美制(AWG)、英制(SWG)和我们的(CWG)。

几平方是国家标准规定的的一个标称值，几平方是用户根据电线电缆的负荷来选择电线电缆。

电线平方数是装修水电施工中的一个口头用语，常说的几平方电线是没加单位，即平方毫米。

电线的平方实际上标的是电线的横截面积，即电线圆形横截面的面积，单位为平方毫米。

一般来说，经验载电量是当电网电压是220V时候，每平方电线的经验载电量是一千瓦左右。

铜线每个平方可以载电1-1.5千瓦，铝线每个平方可载电0.6-1千瓦。因此功率为1千瓦的电器只需用一平方的铜线就足够了。

具体到电流，短距送电时一般铜线每平方可载3A到5A的电流。散热条件好取5A/平方毫米，不好取3A/平方毫米。

电线电缆线径平方换算方法：

知道电线的平方，计算电线的半径用求圆形面积的公式计算：电线平方数(平方毫米)=圆周率(3.14)×电线半径(毫米)的平方

知道电线的平方，计算线直径也是这样，如：2.5方电线的线直径是：2.5÷ 3.14 = 0.8，再开方得出0.9毫米，因此2.5方线的线直径是：2×0.9毫米=1.8毫米。

知道电线的直径，计算电线的平方也用求圆形面积的公式来计算： 电线的平方=圆周率(3.14)×线直径的平方/4

电缆大小也用平方标称，多股线就是每根导线截面积之和。

电缆截面积的计算公式：0.7854 × 电线半径(毫米)的平方 × 股数

如48股(每股电线半径0.2毫米)1.5平方的线：0.785 ×(0.2 × 0.2)× 48 = 1.5平方。