Most storage devices that do not require vision and a brain to read data fall into this category. Electromagnetic data may be stored in either an analog data or digital data format on a variety of media.
Direct Tripwire Alarm - The wire placed across the path is directly connected with the cord, wire or string placed across the particular path. Laser Tripwire Alarm - An invisible laser, typically an infra-red, is used instead of a cord or string.
Examining the Outlet. 1  1. Remove the outlet. Unscrew the mounting screws located at the top and bottom of the outlet. 2  2. Examine the outlet and the wiring. If you have three wires in the box (black, white, and copper), you will need to attach or tighten the grounding wire. 3  3. Secure the ground wire.