Jumper wires in overhead electrification systems are vital for electrical continuity, especially at mechanical gaps, overlaps, and section insulators. They are flexible, durable, and designed to handle high voltages and currents.

Jumper wires are flexible electrical conductors used to electrically connect:

• Two adjacent contact wires
• Two catenary wires
• Or sections of wire across insulated or mechanical breaks (e.g., at overlaps, switches, or turnouts).