Explain the operating principles of a pre-action sprinkler system, detailing when it is preferable compared to a wet pipe system.

A pre-action sprinkler system is a type of fire suppression system that combines features of both wet and dry pipe systems, offering enhanced protection against accidental water damage. Unlike a wet pipe system, the pipes in a pre-action system are normally dry. Water is held back from entering the sprinkler pipes by a pre-action valve. The system requires two separate events to occur before water is discharged: first, a fire detection event, such as smoke or heat detection, must trigger the release of the pre-action valve; and ....