Copper rectangular wires come in various sizes and dimensions, and the specifications can vary based on the intended application. The size of a copper rectangular wire is typically specified by its width and thickness. The American Wire Gauge (AWG) system is commonly used to denote wire sizes in the United States, while metric dimensions are often used internationally.

Here are some common examples of copper rectangular wire sizes, expressed in both AWG and metric dimensions:
AWG Sizes:
AWG 10 x 20: This denotes a rectangular wire with a width of 10 AWG and a thickness of 20 AWG.
AWG 15 x 25: This denotes a rectangular wire with a width of 15 AWG and a thickness of 25 AWG.

Metric Sizes:
2 mm x 4 mm: This denotes a rectangular wire with a width of 2 mm and a thickness of 4 mm.
5 mm x 10 mm: This denotes a rectangular wire with a width of 5 mm and a thickness of 10 mm.

Cross Sectional area 3 to 75 Sqmm. 
IEC 60317-16, Width 3 to 20 mm; Thick 1 to 5 mm.
Copper conductor and UEW, PEW, EIW, EI/AIW insulation materials

What are enamelled rectangular copper wires?
Enamelled Rectangular Copper Wires are used in low and medium voltage electrical machines such as motors, generators and transformers. The cross section of these wires ranges from 3.0 to 75.0 square millimetre with an insulation Class ranging from 105 to 220 degrees Celsius. Enamelled Rectangular Copper Wires are used in low and medium voltage electrical machines such as motors, generators and transformers. 

What is the size of transformer wire?
LP Industry has the capability to produce larger transformer wires in sizes up to 22mm in width down to the smaller insulated ribbon with a thickness starting around 2mm and typically found in pancake coils. The flat enamelled copper wires are available in over 300 different dimensions 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 defined edge radii are used in motors, generators and transformers. In comparison with round wires, rectangular wires have the advantage of allowing more compact windings, thereby delivering both space and weight savings. The electrical efficiency is also better, which saves energy.

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