What is the purpose of using a wire puller in electrical installations?

The purpose of using a wire puller in electrical installations is specifically to assist in running wires through conduits or walls without damage. Wire pullers are designed to make the process of pulling wire easier and more efficient, especially in situations where wires must navigate through tight spaces or intricate pathways. This helps to prevent the wire insulation from becoming nicked or damaged during the installation process, which could otherwise lead to insulation breakdown and potential safety hazards.

In contrast, other functions mentioned in the choices focus on different aspects of electrical installations. While secure grounding connections, measuring electrical currents, and connecting panels are all critical components of electrical work, they do not pertain to the specific function of wire pullers. Understanding how to effectively use a wire puller can significantly improve the quality of an electrical installation and enhance safety by reducing the risk of wire damage.