Red Seal Electrician Practice
Safety and work practicesQuestion 819 of 1506

A fuse is installed in the grounded side of a load instead of the hot side. The fuse blows. What hazard remains?

  1. None; the load is fully de-energized by the open fuse.
  2. The fuse holder will arc over to the ground wire at once.
  3. The load will draw twice the normal current from the supply.
  4. Dangerous voltage is still on the load, from the hot side.
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Correct answer: Dangerous voltage is still on the load, from the hot side.

The current stops, but the hot supply stays connected to the load, so a person standing on the ground can still be exposed to voltage.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 12.4: Fuses

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Questions last reviewed: 18 October 2026