What should an operator consider about electrical circuits before maintenance?

When preparing for maintenance on electrical circuits, it is crucial to assume that all circuits are live unless they have been positively confirmed to be dead. This approach is critical for ensuring the safety of the operator and anyone nearby. Electrical circuits can retain energy due to capacitors or other components, and there may be hidden power sources that are not immediately visible. Therefore, assuming that a circuit is live protects against accidental contact that could result in electric shock or injury.

In a work context, this precaution ensures that you conduct proper tests with the appropriate equipment before starting any maintenance activity. Equipment such as voltage testers and lockout/tagout procedures should be employed to verify that circuits are indeed de-energized. This principle of always assuming live conditions until proven otherwise is a fundamental aspect of electrical safety protocols, which helps mitigate risks related to electrical work.