The yellow wire in Europe and America is the ground wire. American wire color standards usually include black as the live wire, white as the neutral wire, and green or yellow-green as the ground wire. However, there are no mandatory standards or recommended standards in the NEC (National Electrical Code). The 3-core American wire cores are not these three colors, but black, brown, and blue. Most of them are black as the live wire and brown as the neutral wire. Blue is the ground wire.
Wires refer to conductors that transmit electrical energy. Divided into bare wire, electromagnetic wire and insulated wire. Bare wires have no insulation layer, including copper, aluminum flat wires, overhead stranded wires, and various profiles (such as profile wires, busbars, copper bars, aluminum bars, etc.).
It is mainly used for outdoor overhead and indoor busbars and switch boxes. Magnet wire is an insulated wire that generates a magnetic field when energized or induces a current in a magnetic field. It is mainly used for motor and transformer windings and other related electromagnetic equipment.
The conductor is mainly copper wire, which should have a thin insulation layer and good electrical and mechanical properties, as well as heat resistance, moisture resistance, solvent resistance and other properties. Different properties can be obtained by choosing different insulation materials.