Resin composition and power cable

A power cable, comprising:

• a conductor, and
• an insulating layer coated on an outer circumference of the conductor,
• wherein the insulating layer is formed from a resin composition,
• the resin composition comprises a resin component containing propylene units, and a resistance-imparting agent,
• the resistance-imparting agent is a monomer having a phenol skeleton with hydrogen or an alkyl group having 1 to 3 carbon atoms, bonded to at least one of ortho positions to the hydroxyl group of the phenol skeleton, and has a melting point of 215° C. or less and a molecular weight of 200 or more and 500 or less,
• a content of the resistance-imparting agent is 0.4 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the resin component, and
• a content ratio of metal impurities is 0.02% by volume or less.