What should be done before starting electrical work?

Before starting any electrical work, the foremost priority is ensuring safety. This means that power must not only be turned off but must also be verified as being de-energized. Utilizing a voltage tester to confirm that circuits are not live is a critical step in preventing electrical shocks or accidents. Even if the main power supply is turned off, there might still be residual voltage in the circuits or isolated sections that could pose a risk.

The action of verifying with a voltage tester goes beyond just turning off the main power; it adds an essential layer of safety by ensuring that the specific circuits you will be working on have been de-energized. This practice aligns with safe work habits as mandated in electrical codes and standards, emphasizing that workers should never assume a circuit is safe simply because it has been switched off. This rigorous approach helps protect not only the electrician but also any other individuals who may be present in the vicinity.