A fuse or a circuit-breaker may be used to protect electrical cables against large currents that might make them overheat. If a fuse is fitted, at what point should it be connected, and if a circuit-breaker is fitted, at what point should it be connected?
- AFuse at X, circuit-breaker at X
- BFuse at X, circuit-breaker at Y
- CFuse at Y, circuit-breaker at X
- DFuse at Y, circuit-breaker at Y