Power spikes
are very short pulses of energy on a power line and contain very high voltages. These spikes only last a few milliseconds, but they have the potential to cause great damage to sensitive equipment. Often equipment does not fail right away; however in many instances when it does, this seriously affects the shelf life of any electrical equipment.
Power surges
are a temporary increase in a voltage on a power line. Typically surges have less voltage than spikes, however they last much longer and sometimes can surges are preceded by spikes.
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