Which of the following is a safety precaution when working with electricity?

Wearing rubber-soled shoes is an effective safety precaution when working with electricity because rubber is a poor conductor of electricity. This means that it can help insulate the person from electrical currents, reducing the risk of electric shock. Rubber-soled shoes provide an extra layer of protection, particularly when working in environments where contact with live wiring or equipment is possible.

In contrast, using metal tools can increase the risk of electrical conduction, leading to potential shock or injury if the tool comes into contact with a live circuit. Working in wet conditions is highly dangerous, as water is an excellent conductor of electricity, significantly increasing the risk of electrocution. Leaving power on while working poses a substantial threat, as it can lead to unintended contact with live electrical components, heightening the chance of accidents and injury. Thus, wearing rubber-soled shoes is a critical and effective safety measure in electrical work.