PG to Metric and AWG to mm Conversions
Below, we provide very common conversions that are frequently used on design and manufacturing of wire harnesses.
AWG (American Wire Gauge): A logarithmic stepped standardized wire gauge system used, predominantly used in North America, for the diameters of round, solid, nonferrous, electrically conducting wire. Conversely on millimeter based measurement, the cable and insulator gets thinner as AWG value increases. The general rule of thumb is wire diameter doubles for every 6 gauge decrease, cross sectional area doubles for every 3 gauge decrease.
Below, we list the AWG sizes within values of: load (current) carrying capacity, resistance and skin effects. The resistances and skin depth noted are for copper conductors. A detailed description of each conductor property is described below from meters.co.uk
Another common measurement standards are PG (Panzer-Gewinde) and Metric threads that are used on diameters of cable glands, spirals and connector panels/hoods. Below, we provide a chart to visualize common PG vs. Metric sizes.
Since cable-glands are integrated connectors and spiral glands are integrated into spirals, both parties should have same diameter lengths; and the PG metric denotes the size of point P for the example cable gland image below.