Questions · Cameras
A camera restarts on its own every so often. What is that usually?
Almost always it is power, and specifically the switch falling short when that camera asks for everything it can ask for. Restarts that show up at night or in winter give the pattern away: at dusk the infrared comes on and in cold weather the heater starts, and at that moment the consumption shoots above what the port or the power supply can give.
The second cause is the cable: runs close to the distance limit, badly crimped connectors, or copper-clad aluminium cable instead of copper, which has far more resistance and makes the voltage drop just when the most current is flowing. You spot it because the problem only appears on the furthest cameras.
The third, rarer but real, is thermal: a camera in direct sun inside a housing with no ventilation protects itself by switching off and coming back. It is told apart from the others because it fails at midday in summer and never at night. Before changing the camera it is worth looking at the switch log, which usually records the moment power was cut on each port.
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