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  2. Electric fence - Wikipedia

    en.wikipedia.org/wiki/Electric_fence

    A "stun–lethal" fence may also consist of two fences; one set of wires forming a conventional pulsed DC non-lethal fence, the second set (interleaved with the first) forming a 6.6 kV AC lethal fence, energized when the DC fence detects an intruder. Alternatively it may consist of a single, AC or pulsed DC fence capable of running in "safe ...

  3. Wire obstacle - Wikipedia

    en.wikipedia.org/wiki/Wire_obstacle

    The effectiveness of any wire obstacle is greatly increased by planting anti-tank and blast antipersonnel mines in and around it. Additionally, connecting bounding anti-personnel mines (e.g. the PROM-1) to the obstacle with tripwires has the effect of booby-trapping the obstacle itself, hindering attempts to clear it.

  4. Concertina wire - Wikipedia

    en.wikipedia.org/wiki/Concertina_wire

    Several such coils with a few stakes to secure them in place are just as effective as an ordinary barbed wire fence, which must be built by driving stakes and running multiple wires between them. A platoon of soldiers can deploy a single concertina fence at a rate of about a kilometre (5 ⁄ 8 mile) per hour. Such an obstacle is not very ...

  5. Electrical tape - Wikipedia

    en.wikipedia.org/wiki/Electrical_tape

    Electrical tape, standard black. Electrical tape (or insulating tape) is a type of pressure-sensitive tape used to insulate electrical wires and other materials that conduct electricity.

  6. Razor wire - Wikipedia

    en.wikipedia.org/wiki/Razor_wire

    Razor wire—long-barb type on top of a chain link privacy-fence surrounding a utility power sub-station. Barbed tape or razor wire is a mesh of metal strips with sharp edges whose purpose is to prevent trespassing by humans. The term "razor wire", through long usage, has generally been used to describe barbed tape products.

  7. Single-wire earth return - Wikipedia

    en.wikipedia.org/wiki/Single-wire_earth_return

    Single-wire earth return (SWER) or single-wire ground return is a single-wire transmission line which supplies single-phase electric power from an electrical grid to remote areas at lowest cost. The earth (or sometimes a body of water) is used as the return path for the current, to avoid the need for a second wire (or neutral wire ) to act as a ...