Parallel groove clamp is a very important wiring connector, although it seems inconspicuous in power use. The traditional H-type aluminum crimping clamp, however, has some shortcomings such as non reusability and non disassembly. However, for use in some regions in China, since the ejection gun is used during installation, it is easy to cause the problem that one of the wires or cables is too tight and the other side is too loose due to the compression deviation during the compression process, which leads to poor connection effect.

The inner wedge of the wedge parallel groove clamp is provided with an axisymmetric scale to distinguish the tightness of wires or conductors on both sides, which can improve the overall connection effect of wires or cables. The utility model comprises a wire clamp base, which is provided with a wire clamp groove. The wire clamp groove includes a semicircular wire groove on both sides and a wedge groove connecting two wire grooves. The wire clamp groove is matched with an inner wedge, and the side wall of the inner wedge is provided with an inner groove matched with the semicircular wire groove. The utility model is characterized in that: the upper end surface of the inner wedge block is provided with a number of scribed lines spaced at equal intervals, and the centerline of the upper end surface of the wedge block within the scribed line is a symmetrical line distributed on the left and right sides. The scribed lines are distributed from the middle to both sides and straight to the edge of the upper end face. When the wire or cable is inserted into the wire trench on both sides, the wire or cable is compressed by driving the wedge block to move towards the side with small diameter of the wire clamp slot. In the compression process, the compression of wires and cables on the left and right sides is judged by observing the coverage of the scribed lines on the inner wedge to provide the connection effect of wires and cables.

Lawrence Electric, on the basis of meeting the national standards, adopts good materials to manufacture, which improves the shortcomings of the clamp. Its design is reasonable, and the clamp has been changed without affecting the power transmission performance and stable and reliable performance of the clamp. It is conducive to the protection of transmission lines, and at the same time, it saves materials, reduces weight, and reduces the use cost of wire clamps. The power wedge parallel groove wire clamp can be suitable for the steel strand, aluminum strand or steel cored aluminum strand connection works of overhead power lines.