If the apartment turned off sharply, then it is possible that the wiring closed. And if the characteristic smell of molten plastic appeared and the characteristic smell of molten plastic appeared (the insulation burned) - then the wiring just closed somewhere.
It may happen that a characteristic crackle is heard in a rosette or electrical shield and a bright flash is visible - this also happens a short circuit (KZ), but without automatically disconnecting the fuses. Previously, it was "traffic jams", and now - "automata". When the wiring closed, then the first thing you need to turn off all the machines - they are in an electric home shield. If an open fire is visible in the closure site, then it must be put out immediately. It is best to throw a dense blanket or any suitable tissue on the fire focus. Never extinguish with closed wiring with water - it is an excellent electric current conductor.So that the wiring in the apartment does not close, it is necessary at the stage of the main repair. to choose Reliable electrical wires. Their power should be such that it is enough to connect numerous home appliances. Machines should also be selected by the appropriate security class. The experienced electricians advise the electrical wire tracks to plan at the level of the plinths so that when clogging nails for a shelf or kashpo, nonsense not to break the hidden wiring.