Is the property responsible for the sudden power outage of the electric power bureau without notice and the owner is trapped?

Elevator apartments have dual power supply as required. Unless both roads stop, few people will be trapped because of power failure. You need to find out why the other power supply has also stopped. If it is also because of the power bureau, you have to admit that you are unlucky, but it is very likely that the two power supplies in your community are fake, that is, both of them come from the same substation, not from different substations. If this is the case, you should call the developer. As for whether the property is responsible, we can see whether the three-way call of the elevator is smooth after the power failure and whether the property comes to save people at the first time. If so, the property is not responsible.