Why should a person work with only one hand when possible?

• A. So current doesn't pass through your heart
• B. To reduce fatigue
• C. To avoid losing balance
• D. To minimize tool drop risk

Answer: (A)

The main safety idea is to minimize the path that electrical current can take through your body. If you use both hands while wiring or testing live parts, current can travel from the live piece through one hand, across the chest, and out the other hand—passing near or through the heart. That path greatly increases the risk of a dangerous or fatal shock. By working with only one hand when possible, you reduce the chance that electricity travels through your chest and heart, since there are fewer routes for the current to take.

Of course, other factors like fatigue, balance, or dropping tools can matter in any task, but they don’t address the most critical danger as directly as limiting a current path through the heart. Always de-energize circuits, use insulated tools, and wear appropriate PPE to further lower risk.