If each elevator has its own hoistway and machine room, what is true about the required circuits for recall and warning?

If each elevator has its own hoistway and machine room, what is true about the required circuits for recall and warning?

• A. No additional circuits would be required
• B. Additional circuits would be required per elevator
• C. Only one circuit is needed
• D. Circuits are independent of hoistway configuration

Answer: (B)

When each elevator has its own hoistway and machine room, the recall and warning systems must operate independently for that elevator. Recall is the fire-service function that brings the car to a safe floor and doors open, while warning devices alert occupants during that operation. Because the control and safety circuits for one hoistway are separate from another, the circuits that handle recall and the accompanying warning must be dedicated to that specific elevator to ensure reliable performance and to prevent cross-talk or a single fault from affecting multiple elevators. Sharing circuits across different hoistways could compromise safety by linking independent systems. So, additional circuits are required per elevator to maintain independent, safe operation.

When each elevator has its own hoistway and machine room, the recall and warning systems must operate independently for that elevator. Recall is the fire-service function that brings the car to a safe floor and doors open, while warning devices alert occupants during that operation. Because the control and safety circuits for one hoistway are separate from another, the circuits that handle recall and the accompanying warning must be dedicated to that specific elevator to ensure reliable performance and to prevent cross-talk or a single fault from affecting multiple elevators. Sharing circuits across different hoistways could compromise safety by linking independent systems. So, additional circuits are required per elevator to maintain independent, safe operation.