What can cuts or abrasions on hands negate, affecting current flow?

Cuts or abrasions on the hands primarily affect contact resistance, which is the resistance encountered at the point of contact between the skin and an electrical conductor. When the skin is intact, its outer layer provides a certain level of resistance to electrical current. However, when there are cuts or abrasions, this protective layer is compromised, significantly lowering the contact resistance.

This change can allow a more significant amount of electrical current to flow through the body if a person comes into contact with a live circuit. Therefore, damaged skin can create a dangerous scenario, increasing the risk of electrical shock or injury. Recognizing the potential for decreased contact resistance due to skin damage is crucial for maintaining safety standards and practicing caution when working with or around electricity.