Final answer:
The secondary power supply should have sufficient capacity to operate an electronic premise security system under maximum quiescent load.
Step-by-step explanation:
The subject of the question is Computers and Technology.
Under maximum quiescent load, the secondary power supply should have enough capacity to operate an electronic premise security system.
This means that the power supply should have sufficient power to keep the security system running smoothly and without any interruptions, even under heavy load.