Question

Either a fuse or a circuit-breaker can be used to protect electrical cables from large currents that could cause overheating.
When a fuse is used, where should it be connected, and when a circuit-breaker is used, where should it be connected?

• A. Position of fuse - $X$, Position of circuit-breaker - $X$
• B. Position of fuse - $X$, Position of circuit-breaker - $Y$
• C. Position of fuse - $Y$, Position of circuit-breaker - $X$
• D. Position of fuse - $Y$, Position of circuit-breaker - $Y$

Answer 1

The correct option is A Position of fuse - $X$, Position of circuit-breaker - $X$

Both fuse and the circuit breaker works on the same principle of breaking te circuit so, they must be placed on the same position. That is position X , so that the circuit is broken between live and neutral points.