In a Class B circuit, when the conductor is broken, which portion continues to function?

In a Class B circuit, when the conductor is broken, which portion continues to function?

• A. Everything before the break
• B. Nothing
• C. Everything after the break
• D. The load only

Answer: (A)

In a Class B circuit, the power feed goes along a single path from the control panel toward the devices. If that conductor breaks, there’s no alternate path around the break, so current cannot reach the downstream devices. The portion of the circuit that is still connected to the source—everything on the panel side of the break—remains energized and continues to function. The part beyond the break loses power because the circuit is no longer complete for that downstream section. This is why the segment before the break keeps operating.

In a Class B circuit, the power feed goes along a single path from the control panel toward the devices. If that conductor breaks, there’s no alternate path around the break, so current cannot reach the downstream devices. The portion of the circuit that is still connected to the source—everything on the panel side of the break—remains energized and continues to function. The part beyond the break loses power because the circuit is no longer complete for that downstream section. This is why the segment before the break keeps operating.