Someone reading AWG, the first thing that will come to mind is the piercing. The why is soon said. This system is in fact commonly used to specify the size of body jewelry, especially if it is small. But this data is of fundamental importance also for cables HDMIespecially to measure the cross-section of their conductors. Ricableoptimizes the size of the cable strand. Across at 25 AWG, while the cable Hi-End e Supreme at 24 AWG. But how to measure AWG in HDMI cables?
How the abbreviation was born and how it is used to measure the cross-section of HDMI conductors
The acronym stands for American Wire Gauge, a standardized system for measuring wire section. This has been used since 1857, especially in North America. It is important to consider that this measurement is only used for solid and round conductors, which is why it is often used in audio/video cables, including HDMI cables, because it is a value referred to the single conductor that, based on the geometry of the cable, forms the final conductor, with various types of braiding. In fact, if we have a cable with a multi-wire conductor, when we say that the conductor is 24 AWG, this value does not refer to the whole braid, but to every single wire that composes it. The cross-section of the wire (gauge) is an important factor in determining the maximum current intensity that can flow through it.
As the measured number increases, the diameter of the wire is progressively smaller. This measuring system is based on the number of drawing operations used to produce a given wire diameter. It is clear that a very thin one would require more passes through the die than a 0 gauge wire, for example. It is for this reason that as the value increases, the diameter decreases. The development of standardised measures has rationalised the system. Initially, however, each manufacturer had its own measuring system.
The AWG for a cable is determined by the total area of the conductor cross-section, which in turn determines its current carrying capacity and electrical resistance. Since there are also small cavities between the wires, the cables always have a slightly larger overall diameter than a solid wire with the same AWG.
The table. Tricks to remember it by heart and how AWG works
The various parameter ratios are those listed in the table below, useful for measuring AWG for HDMI cables. Generally the conversion table with the metric system ranges from 0000 (4/0) up to 44 AWG and covers all conductors used commercially in audio/video, including HDMI cables. However, there is also a mnemonic rule to facilitate calculations. According to this, when the diameter of a wire doubles, the AGW is reduced by 6 units; when it is the section of a wire that doubles, the AWG is reduced by 3 units. Finally, when the AWG value decreases by 10, the section and weight increase by as many times, while the resistance is reduced by a factor of 10.
The cables are specified with three numbers: the overall AWG size, the number of wires making up the cable and the AWG size of the wire. The number of wires and the AWG of a single wire are separated by a bar. For example, a 22 AWG 7/30 is a 22 AWG cable consisting of seven wires with a size of 30 AWG. These are the values that make us understand how to measure AWG in HDMI cables.
Colloquially, AWG is referred to as gauge and zeroes in large wire sizes are referred to as aught. This refers to 1 AWG size wires as one gauge; similarly, smaller diameters are pronounced with the corresponding positive integer number. For larger wire sizes (#0 and up), the word gauge becomes one aught, two aught and so on, depending on how many zeros there are in the AWG code. In other cases the word gauge is replaced by the word number, which appears before the size.
The AWG cable conversion table. How to measure HDMI cables (and more)
|AWG||Diameter mm||Section (Area) mm²|