Publisher Summary This chapter reveals that the backup electrical power and power-line conditions are an essential consideration in any video security system. Uninterrupted power supply (UPS) equipment is available and is used for all strategic video security and safety equipment. The proper power line filtering and conditioning saves time and money and increases security. There is a choice of alternating current (AC) or direct current (DC) power in the form of power line, power converters, batteries, and solar panels for powering all equipment necessary for any video security application. Distribution and ground loop problems should not be attacked with “black magic” fixes because these solutions tend to be temporary and often create other chronic problems. A thoughtful examination of each demanding element in the system and its effect on the overall distribution network is far more valuable than a dozen quick fixes. Improper grounding and shielding of power and signal lines are major causes of noise interference in sensitive electronic equipment.