chewed wiring from rodents 4
https://mag-wiki.win/index.php/How_a_Rodent_Entry_Point_Inspection_Can_Save_Your_Home_from_Infestation
Rodents gnawed on the wiring in our attic, causing a short circuit that killed power to half the house. The chewed plastic casings and exposed copper strands were a real mess. We had to call an electrician to replace the damaged sections and seal up entry points to keep the critters out.