What is the most effective way to prevent electric shock when working on electrical circuits?

Turning off the power and locking the disconnect is the most effective way to prevent electric shock when working on electrical circuits. This action eliminates the risk of electrical current flowing through the circuit during maintenance or repair, providing a safe working environment. By ensuring that the power is completely off, you prevent any chance of accidental re-energization, which could lead to serious injury or fatality.

While wearing rubber gloves, using insulated tools, and working quickly may contribute to safety, they do not provide the same level of protection as completely de-energizing the circuit. Rubber gloves and insulated tools can help reduce the risk of shock but only if the circuit is still not live; their effectiveness can be compromised if they’re worn or damaged. Working quickly may reduce exposure but does not eliminate risk and could lead to mistakes if haste compromises attention to safety protocols. Therefore, the most reliable safeguard is always to turn off the power and lock out the disconnect before beginning any work on electrical circuits.