A wiring harness disclosed in the Patent Document 1 has three high-voltage electric wires and three metallic protection pipes for receiving and protecting the three high-voltage electric wires one by one. The high-voltage electric wire connects a motor mounted on a front side of a vehicle with an inverter mounted on an intermediate or rear side of the vehicle.
The wiring harness is arranged via a vehicle under floor which is an outside of a vehicle frame. For this reason, the metallic protection pipe is formed so that the high-voltage electric wire can be protected from being splashed with water or stone. The metallic protection pipe has stiffness property for protecting the high-voltage electric wire and preventing deflection of the high-voltage electric wire, and an electromagnetic shield function since it is made of metallic.
The three wiring harness insert the high-voltage electric wire into the metallic protection pipe with a straight state, respectively. Thereafter, the metallic protection pipe is bent along a route of the wiring harness arranged on the vehicle under floor. The wiring harness is manufactured with a factory of harness manufacturer as described above. Thereafter, the wiring harness is conveyed to an assembly factory of vehicle manufacturer, and is assembled in a predefined position of the vehicle. Thereby, arrangement of the wiring harness is completed.