What should be checked before working on any electrical circuit?

Before working on any electrical circuit, it is essential to verify whether the circuit is live. This check is crucial for ensuring the safety of the person performing the work. If a circuit is live, it poses a risk of electric shock or electrocution, which can have serious consequences. By confirming that the circuit is de-energized, workers can proceed safely with their tasks, whether they are making repairs, installations, or conducting maintenance.

While the properties of conducting materials, the presence of insulation, and the location of electrical panels are relevant to overall electrical safety and performance, they do not directly address the immediate risk of working on a live circuit. Ensuring that a circuit is not live is the number one priority to prevent accidents and injuries.