In a Class B notification circuit, a break in the wiring affects devices beyond the break; what remains operational?

In a Class B notification circuit, a break in the wiring affects devices beyond the break; what remains operational?

• A. The devices beyond the break
• B. The devices between the panel and the break
• C. All devices in the circuit
• D. None

Answer: (B)

In a Class B notification circuit, power flows along a single path from the control panel to the devices. If a break occurs, the circuit becomes open past that point, so current cannot reach devices located beyond the break. The section of the circuit from the panel up to the break remains continuous and energized, so those devices stay operational. The devices beyond the break lose power because the open circuit prevents current from completing the circuit back to the power source. This is why the correct result is that only the devices between the panel and the break stay working.

In a Class B notification circuit, power flows along a single path from the control panel to the devices. If a break occurs, the circuit becomes open past that point, so current cannot reach devices located beyond the break. The section of the circuit from the panel up to the break remains continuous and energized, so those devices stay operational. The devices beyond the break lose power because the open circuit prevents current from completing the circuit back to the power source. This is why the correct result is that only the devices between the panel and the break stay working.