Final answer:
Arc welding cables in need of repair must be replaced immediately.
Step-by-step explanation:
Arc welding cables in need of repair must be replaced immediately.
Arc welding cables are subjected to high temperatures and large currents, which can cause wear and tear over time. If the cables are damaged or show signs of wear, they must be replaced to ensure safe operation.
Visual inspection can help identify any visible damage to the cables, but ultimately, replacement is necessary to maintain safety and prevent further damage.