How should electrical equipment generating flammable vapors be operated in relation to the ventilation system?

The proper operation of electrical equipment that generates flammable vapors is to interlock it with the ventilation system. This approach ensures that the equipment only operates when the ventilation system is actively functioning to remove hazardous vapors from the environment. By interlocking these systems, the risk of fire and explosion is significantly reduced because the ventilation system can continuously dilute or exhaust the flammable vapors, maintaining a safe atmosphere.

This safety measure aligns with best practices and regulatory standards aimed at protecting personnel and property in environments where combustible vapors may be present. Proper interlocking means that if the ventilation system fails or is turned off for maintenance, the electrical equipment will not operate, further enhancing the safety of the working environment.

Routine testing, while important, does not replace the need for interlocking; it is a separate safety measure focused on ensuring that both the ventilation and electrical systems are functioning correctly. Similarly, stating that the equipment can operate independently or does not require connection to the ventilation system overlooks the critical safety considerations that necessitate the integration of both systems.