Before working on electrical circuits in vapor recovery systems, what should always be done?

De-energizing the electrical circuits before working on vapor recovery systems is crucial for safety. This practice significantly minimizes the risk of electric shock or injury while performing maintenance or repairs. Additionally, adhering to NFPA (National Fire Protection Association) rules ensures compliance with established safety standards in handling electrical systems, especially in potentially hazardous environments like vapor recovery systems.

Working with energized circuits poses a high risk of electrical accidents, which can be mitigated by de-energizing the system. Once the circuits have been de-energized, other safety measures like wearing insulated gloves, checking voltage levels, and testing for current leakage can be more effectively implemented. These steps help to ensure a safe working environment and align with best practices in electrical safety within hazardous locations.