Product property: a broad usage in the low voltage insulation lines,leading the branch connection from the main conductor. T-connection of low voltage insulation wire service and cable branch connection for building distribution system. The connectors with specially designed contact teeth are suitable for the connection of aluminum and copper. Outside insulation shield is adopted fiber glass reinforced high polymer material. It is unnecessary to remove the insulation layer of the connector when using. Put the main conductor and branch conductor parallel in to the teeth grooves of the connector tighten the bolt to make the conductors connect. The insulation conductor is convered with the insulation shield and sealed then the functiona act as waterproof and sealing perfectly.