danger of fire and electric shock. annealed wire, connector, terminal block made of non-combustible, non-combustible material. bad

accident alarm annealed bad block break broken burn burnt cable check circuit connector consumer customer damaged danger dangerous electric electrical electricity failure faulty fire fireproof flame goods high home house installation made material negligence negligent noncombustible nonflammable overloaded plug power problem product quality risk safety shock short smoke splicing terminal torn volt voltage wire wiring work