Multicore cable-having a stranded pair of core electric wires and an adjacent wire with a controlled diameter ratio

A multicore cable comprising:

• a first core wire composed of a pair of first core electric wires and a wire that are stranded together;
• and
• a first sheath layer disposed around the first core wire,
• wherein:
• the first core electric wires each include a first conductor and a first insulating layer covering an outer surface of the first conductor,
• the wire is a stranded core electric wire including a second core wire and a second sheath layer disposed around the second core wire, the second core wire composed of a plurality of third core electric wires that are stranded together,
• the third core electric wires each include a third conductor and a third insulating layer covering an outer surface of the third conductor,
• the pair of the first core electric wires is in contact with each other,
• the second sheath layer is in contact with each of the pair of the first core electric wires, and
• a ratio d2/d1 of an average outer diameter d2 of the wire to an average outer diameter d1 of each first core electric wire is more than 0.5 and less than 2.0, where d1 is an average outer diameter of the first insulating layer of each first core electric wire, and d2 is an average outer diameter of the second insulating layer of the second core electric wire.