Rectangular copper wire is available in a variety of sizes and specifications, which can vary depending on the intended application. The size of rectangular copper wire is usually determined by its width and thickness. The American Wire Gauge (AWG) system is commonly used in the United States to represent wire sizes, while metric sizes are commonly used internationally.

Below are some examples of commonly used rectangular copper wire sizes, expressed in both AWG and metric sizes:
AWG Size:
AWG 10 x 20: Indicates rectangular wire with a width of 10 AWG and a thickness of 20 AWG.
AWG 15 x 25: Indicates a rectangular wire with a width of 15 AWG and a thickness of 25 AWG.


Metric sizes:
2 mm x 4 mm: Indicates rectangular wire with a width of 2 mm and a thickness of 4 mm.
5 mm x 10 mm: Indicates rectangular wire with a width of 5 mm and a thickness of 10 mm.

Cross-sectional area 3 to 75 mm².
IEC 60317-16, width 3 to 20 mm; thickness 1 to 5 mm.
Copper conductor and insulation UEW, PEW, EIW, EI/AIW

What is enameled rectangular copper wire?
Enameled rectangular copper wires are used for low- and medium-voltage motors such as electric motors, generators and transformers. These copper wires are available in cross-sections from 3.0 to 75.0 square millimeters and have insulation ratings from 105 to 220 degrees Celsius. Enameled rectangular copper wires are used in low and medium voltage motors such as electric motors, generators and transformers.

What are the wire sizes for transformers?
LP Industry is able to produce larger transformer wires up to 22 millimeters in width, as well as smaller insulating tapes starting at around 2 millimeters in thickness (typically used for pancake coils). Flat enameled copper wire is available in more than 300 different sizes, from 2.0 x 0.8 to 22.0 x 8.0 mm.

What are the advantages of rectangular wires?
In the electrical industry, rectangular wires with a defined edge radius are used in motors, generators and transformers. The advantage of rectangular wires over round wires is that more compact windings can be realized, thus saving space and weight. The electrical efficiency is also better, thus saving energy.