What is the time limit within which an open condition must be indicated in signaling line circuit monitoring?

What is the time limit within which an open condition must be indicated in signaling line circuit monitoring?

• A. 100 seconds
• B. 150 seconds
• C. 250 seconds
• D. 200 seconds

Answer: (D)

Open condition on a signaling line circuit is a fault where the circuit’s continuity is broken. The fire alarm control panel must indicate this trouble within 200 seconds to ensure a real wiring fault is surfaced promptly so maintenance can locate and repair it. This 200-second limit strikes a balance: it’s short enough to catch actual faults quickly, but not so fast that temporary or incidental interruptions cause nuisance trips. When the open condition is detected, the panel flags a trouble condition on the signaling line circuit, alerting that a break in the loop has occurred.

Open condition on a signaling line circuit is a fault where the circuit’s continuity is broken. The fire alarm control panel must indicate this trouble within 200 seconds to ensure a real wiring fault is surfaced promptly so maintenance can locate and repair it. This 200-second limit strikes a balance: it’s short enough to catch actual faults quickly, but not so fast that temporary or incidental interruptions cause nuisance trips. When the open condition is detected, the panel flags a trouble condition on the signaling line circuit, alerting that a break in the loop has occurred.