What is a potential danger associated with working on live circuits?

When working on live circuits, the primary concern is the risk of electric shock. Live circuits carry electrical current that can cause severe injury or even fatality if a person comes into contact with them. Electric shock occurs when electrical current flows through the body, which can disrupt normal electrical signals in the heart and nervous system, leading to serious health consequences.

Managing this risk is critical in electrical work. Proper safety precautions must be followed, such as using insulated tools, wearing personal protective equipment (PPE), and ensuring that proper training has been completed. Reviewing safety protocols and ensuring the circuit is de-energized before work begins helps to mitigate the potential danger of electric shock.

While the other options all represent valid safety concerns in various work environments, none pertain specifically to the inherent risks associated with working on live electrical circuits. Risks of falling from height or manual handling injuries are more relevant to physical environment hazards, and inhaling toxic fumes relates to materials rather than electrical work specifically. Thus, the risk of electric shock stands out as the most pertinent danger in this context.