What purpose does a cable spear serve in electrical work?

The principal function of a cable spear in electrical work is to provide a means of grounding the cable. Grounding is crucial in electrical systems as it helps to ensure safety by directing any excess electrical charge, such as a fault current, safely into the earth. This minimizes the risk of electric shock or fire caused by malfunctioning equipment or wiring.

Cable spears typically feature a pointed end that can be driven into the ground when setting up electrical installations, particularly for overhead power lines or cable systems. This grounding method is especially important in outdoor installations where lightning strikes or other surges can occur.

While splicing cables, providing insulation, and offering support are all essential aspects of electrical work, they do not pertain to the specific function of a cable spear, which is designed for grounding purposes.