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2.5.1 Add Surge Protector
Not only the water but also the surge could damage the camera. If the lighting hit the camera, it will fire the camera without any doubt. However, the chance is small being hit by the lighting. The lighting may hit the ground and observed by the power cord, eventually travel to the camera damage the power system.
Adding the surge protector to next to your camera can cancel or reduce the surge. The DC12V surge protector is passive. There is no need power.
Firstly connect the power cord to the input of the surge protector.
Next, connect the output of surge protector to the camera.
Now ground the surge protector.
Ground the surge protector can introduce the surge to the ground. Even you are unable to find the ground spot. The surge protector still can absorb part of the surge inline.