Sags also reduce the efficiency and life span of electrical equipment, particularly motors. Complete loss of utility power. Loss of utility power means the connected equipment goes down. Businesses and customers lose system availability for all kinds of transactions. Work completed since the last save is lost.
Spikes are forceful the tidal waves of electric current.
Typically, spikes are caused by a nearby lightning strike. But they can also occur when utility power comes back online after a blackout. A spike can enter electronic equipment through the AC outlet or network data lines, resulting in catastrophic damage to hardware and complete loss of stored data. The extra voltage is dissipated through the power line. Surges also occur through electrical transients that arc or jump onto a network cable.