Which of the following is a key safety precaution when working with electrical systems?

The importance of always wearing personal protective equipment (PPE) and ensuring that circuits are de-energized cannot be overstated when working with electrical systems. Personal protective equipment, such as gloves, safety glasses, and hard hats, provides essential protection against electrical shocks, arc flashes, and other hazards present in electrical work environments. Wearing PPE significantly reduces the risk of injury and enhances safety.

Ensuring circuits are de-energized before beginning work is critical because it eliminates the risk of electric shock. Working on live circuits greatly increases the likelihood of accidents, as unexpected contact with electrical components can lead to severe injuries or fatalities. De-energizing circuits means that any potential for electrical current flow is removed, providing a safe working environment.

The other choices, while they may offer some benefits, do not provide the same level of critical safety as wearing PPE and de-energizing circuits. Using a non-conductive ladder can be a helpful secondary measure to prevent shock when working at heights, but it does not address the direct risks associated with energized circuits. Working alone can introduce additional hazards, such as having no one to assist in an emergency. Keeping tools in a closed toolbox is good practice for organization and safety from trip hazards, but it does not specifically