The insulation piercing clamp is mainly composed of reinforced shell, piercing blade, sealing gasket, waterproof silicone grease, high-strength bolts, torque nuts and cable terminal caps. When the cable needs to be branched or connected, insert the cable branch line terminal into the waterproof terminal After determining the location of the main line branch, use a socket wrench to tighten the torque nut on the clamp. During the process, the contact blade will pierce the cable insulation layer and contact the conductor. The sealing gasket ring will press around the punctured position of the cable, inside the casing. The silicone grease overflows. When the torque reaches the set value, the nut torque mechanism falls off, the main line and branch line are connected, and the waterproof performance and electrical effect reach the parameters required by the standard.