I`ve often wondered how horses could be left to meander in meadows without galloping off into the sunset. I see them in fields being contained with what looks like a small wire fence and I have often thought that surely they could jump them if they tried. What I have discovered is that Electric Fencing keeps the horses in their pastures. These fences aren`t powerful enough to do any damage they merely give the horse a slight buzz when they touch the wire. The horse might touch the Electric Fencing a few times when it`s first installed but after that they become used to the fencing. They realise that if they go near the Electric Fencing they will receive the buzz from the wire. Complete types of Electric Fencing can be bought by anyone that keeps horses in enclosures. Included in the kits are fencing posts and Electric Fencing tape, as well as an insulated storage tensioning reel. The Electric Fencing is powered by a 12 volt energiser unit that is equipped with a 1 metre earth stake. When it`s all put together it makes a comprehensive enclosure that is highly discreet and is capable of containing a magnitude of mighty mares and frisky foals.

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Heat shrink, also known as heat shrink tubing, is a thin tube which tends to shrink in diameter when heated. Its usage is to insulate wires, connections and terminals in electrical engineering and may also be used to repair wires, bundle wires together, and to protect these wires and part from abrasions. It is usually made of a thermoplastic material like polyolefin, fluoropolymer, PVC, neoprene, silicone elastomer or viton. It is usually placed over a connection and when it is heated the tubing contracts as much as one sixth of its original diameter, providing a snug fit over oddly shaped joints and thus providing good electrical insulation, protection from dust, solvents and other foreign materials as well as strain relief. In the case of overheating, the heat shrink can melt, scorch or catch fire just like normal plastic. It can be found in various different colors to make it easy to color code your wires and connections. These days it is also used in PC`s to make the interiors of computer tidier and also for the aesthetic aspect of these computers. Hence the manufacturers have also started making them in luminous and UV reactive ranges. There are two ways in which the heat shrink works and it varies with the material that is used. It the material contains monomers then when the tubing is heated they become bonded together, increasing the density of the material and thus causing it to shrink. In the case of an expansion based heat shrink the tubing is produced normally and then heated to above the polymers crystalline melting point and then mechanically stretched. Finally it is rapidly cooled. Later on when it is heated it will relax back to its unexpanded size. This material is also often cross-linked through electronic beams, peroxides or moisture which helps to maintain the shape of the tubing before and after the shrinking process.