3 sentences

1. 电线老化导致了短路。

   diàn​xiàn lǎo​huà dǎo​zhì le duǎn​lù.

   Aging wires caused a short circuit.

   Source: Dong Chinese Dictionary

2. 电线短路时冒出了火花。

   diàn​xiàn duǎn​lù shí mào​chū le huǒ​huā.

   Sparks flew when the wire short-circuited.

   Source: Dong Chinese Dictionary

3. 电线短路导致这栋老房子走火了。

   diàn​xiàn duǎn​lù dǎo​zhì zhè dòng lǎo fáng​zi zǒu​huǒ le.

   A short circuit caused the old house to catch fire.

   Source: Dong Chinese Dictionary