For newcomers to the electronics industry, it is essential to understand some knowledge about wires and cables,
What is the difference between cables and wires?
What are the standards for cables and wires?
What units are used to express the size of cables and wires? Etc.
Today, Kehan supplier will take you through some of the basics of cable and wire.
what is the difference between cables and wires?
Cables and wires are both made up of conductors and insulation,
the difference being that cables are made up of multiple wires + insulation
so that they can withstand greater currents and voltages, and all cables are mostly used in large power supply lines.
What units are used to express the size of wire?
The unit of wire and cable has two measurement methods: square millimeter (MM2) and AWG.
The size of the wire is measured by the size of its cross-sectional area, and cannot be defined by its length, width, and height, so what appears is 0.5, 1.5, 2.5...square millimeters.
The current carrying capacity of the wire is proportional to its cross-sectional area. The thicker the wire, the smaller the resistance and the greater the current passing through it.
AWG is another standard for distinguishing wire diameters, namely American wire gauges, such as 12 AWG, 18 AWG, 24 AWG and so on. This standardized wire gauge system was used in the United States in 1857 and has now been adopted by most countries.
Generally, the wire size of a single-wire conductor is determined according to the diameter, while the wire size of stranded wire is determined according to the cross-sectional area.
The smaller the wire number, the larger the cross-sectional area, the greater the current that the cable can transmit, and the longer the transmission distance.
Is it ‘Gauge’ or ‘AWG’?
Both Gauge and AWG are ideally the same. When writing, we call it a gauge for clear understanding.
AWG measurements do not consider the insulation of the conductor. The higher the AWG number, the smaller the conductor.
Common AWG Gauge sizes
Wire gauges come in a set of standard sizes you can choose from, depending on the amount of current you want it to carry, and the purpose it is going to serve. These sizes include:
The chart below shows a cross-reference between AWG dimensions and cross-sectional area dimensions.