Many things happen without considering or preparing for, and if your a home owner or someone managing different properties you always want to be ready for the unexpected, this is why we suggest you keep out information in hand as we make extremely easier for you and the people around. 

Some Examples of problems that are most common and unexpected. 

1. A tree falling on the main service line causing power outage to the building

2. An outlet being over used which is caused to burn, most common in the winter when people connect electrical heaters, and in bedrooms when using irons

3. Wiring inside junction boxes becoming loose after time passes