In grounding and bonding, what do the terms step voltage and touch voltage primarily relate to?

In grounding and bonding, step voltage and touch voltage are primarily concerned with electrical potential differences. Step voltage refers to the difference in electrical potential that can occur when a person stands on the ground during a fault condition and the voltage gradients are established in the soil. This situation can lead to a dangerous difference in voltage between the feet that can result in an electric shock.

Touch voltage, on the other hand, is the potential difference between the ground and the objects that a person may touch. This can occur when equipment or conductors become energized, leading to a hazardous condition.

Understanding these concepts is crucial for safety measures in electrical installations. They highlight the importance of proper grounding and bonding to mitigate the risks associated with electrical faults. Therefore, the correct answer is related to electrical potential differences, which is foundational for comprehending how to create safer electrical systems and protect individuals from electrical hazards.