Final answer:
The process of connecting metallic objects with a conductor to the earth, setting them to zero volts, is called grounding. It ensures electrical safety by providing a path for current to disperse and stabilizes voltage levels.
Step-by-step explanation:
The process of connecting two or more metallic objects together using a conductor is known as grounding. This process sets a conductor at zero volts by forming a connection to the Earth using a good conductor. Grounding is vital for safety and functionality in electrical systems as it provides a path for electrical current to safely disperse, helps to stabilize voltage levels, and protects against electrical surges and lightning strikes.