By cutting the electrical flow in a circuit with an overload or short, the fuse/breaker system prevents the house wiring from overheating and catching fire, as well as protecting you and your family from electrical shocks (where you are the "short" in the circuit!).
(you; are; the "short) (the fuse/breaker system; prevents; the house wiring; from overheating and catching fire, as well as protecting you and your family from electrical shocks) (the house wiring; catching; fire)
you the fuse/breaker system the house wiring
are prevents catching
the "short
the house wiring from overheating and catching fire, as well as protecting you and your family from electrical shocks
fire