An electrical emergency would fall under two categories: major and minor emergencies. An example of a major emergency would be if you smell burning or devices seem to be hot to the touch. These are serious electrical issues and should be acted upon as soon as possible. The remaining emergencies are if you lose power for an unknown reason, lights are flickering or you see sparks. As long as the circuits can be isolated temporarily they shouldn’t pose an immediate danger. An electrician should be called as soon as possible for any issue such as these to determine the severity of the situation.
Average commercial electricians have been known to make more than their residential counterparts. This is by no means a rule, just a pattern that is noticeable throughout the trade.
Electricians work with electricity in a manner that eliminates the hazards associated with electricity in scenarios where the power stays on. Electricity is a dangerous thing and should always be de-energized every chance possible to avoid unnecessary risk.