What safety measure should always be taken before working on electrical circuits?

The correct answer emphasizes the critical importance of securely disconnecting power and implementing lockout/tagout (LOTO) procedures before beginning work on electrical circuits. This step is essential because it prevents accidental energization of the circuit while maintenance or repairs are being conducted. By disconnecting power, workers eliminate the risk of electrical shock or other potential injuries that could result from live circuits.

Lockout/tagout procedures provide a systematic way to ensure that the circuit remains de-energized during the work, as it involves placing locks and tags on the circuit breakers or power sources to indicate that the equipment should not be operated. This extra measure protects not only the individual performing the work but also other personnel who may be present in the same environment, ensuring that all precautions are taken to avoid unexpected accidents.

While using insulated tools and wearing rubber gloves contribute to safe working practices, they do not replace the fundamental necessity of ensuring that there is no live electricity present in the circuit before starting work. Ensuring the circuit is energized is actually contrary to safe practices. Hence, the combination of disconnecting power and applying lockout/tagout procedures is the foundational first step in safely working with electrical circuits.