Learn the basics of Electrical Engineering.

Basics of Wire Gauge and AWG system

We previously studied about current. But how to determine the diameter of wire for carrying a specific amount of current.

Wire gauge is the measurement of wire diameter. Wire gauge actually explains how much electrical current a wire can safely carry. American Wire Gauge or AWG is a wire table which is the primary system used for selecting wires. Let's have a look at it:

Here a few points for using the table.
  1. The table is for solid wires. Practically, the wires are stranded (Made of many strands instead of a single solid conductor.
  2. For a change of gauge number by 3 the area is doubled (approx). That is for AWG 37 the area is 19.83 whereas for 34 it is 39.76 which is approximately double in number.


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