Provided is a wiring component having a covering material which is made to be resistant to damages or displacements even when a large amount of electricity is conducted. A wiring component of the present disclosure is a wiring component including an electrically conductive member having an extension length of 450 mm or more, and a covering member covering the electrically conductive member, wherein the covering member contains a polyphenylene ether resin composition, and has a secondary shrinkage A (%) in an extension length direction of the covering member after being subjected to thermal aging at 130° C. for 24 hours satisfying: A