Wrapped insulated wires and coils that can increase or make equal insulation
breakdown voltage even when the insulation
coating thickness is the same, or can increase or make equal insulation
breakdown voltage even when the insulation
coating thickness is reduced to make the insulated wire
diameter smaller. The insulated wire (10) has a conductor (1) and an insulating cover (2) provided on the outer periphery of the conductor (1). The insulating cover (2) is composed of multiple insulating
layers (2a, 2b, 2c, 2d, 2e) formed by overlapping and winding 2 to 5 insulating strips (11, 12, 13, 14, 15). In this insulated wire (10), the insulating cover (2) is configured such that: (1) when there are a total of 2 or 3 insulating
layers formed by overlapping and winding the insulating strips, the total number of windings of each insulating layer is less than or equal to the total number of integer parts of the number of windings of each insulating layer plus 1; or (2) when there are a total of 4 or 5 insulating
layers formed by overlapping and winding the insulating strips, the total number of windings of each insulating layer is less than or equal to the total number of integer parts of the number of windings of each insulating layer plus 2. By configuring it in this way, the above-mentioned problem is solved.