Refer to figure "A" representing an electric oven as shown in the illustration. With the oven turned on, the power available indicator light is off, the oven on indicator light is off, and only elements "6" and "7" appear to be producing heat. Which fuse is blown? EL-0041

Correct Answer: Option A — L1 10A line fuse is blown

In multi-phase commercial galley equipment, a blown primary line fuse on L1 isolates one entire leg of the power supply. This leaves only specific cross-phase elements energized while extinguishing control circuits, indicator lights, and remaining heating elements.