Line splice
method of permanently joining two electrical wires or optical fibers

In electrical engineering and telecommunications, a line splice is a joint directly connecting lengths of electrical cables (electrical splice) or optical fibers (optical splice).
The splices are often protected by sleeves.
Splicing of copper wires
The splicing of copper wires happens in the following steps:
The cores are laid one above the other at the junction.
The core insulation is removed.
The wires are wrapped two to three times around each other (twisting).
The bare veins on a length of about 3 cm "strangle" or "twist". In some cases, the strangulation is soldered.
To isolate the splice, an insulating sleeve made of paper or plastic is pushed over it.
The splicing of copper wires is mainly used on paper insulated wires.
LSA techniques (LSA: soldering, screwing and stripping free) are used to connect copper wires, making the copper wires faster and easier to connect.
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