A barrier block is disclosed which incorporates an electrical terminal in the form of a hollow cylindrical barrel provided with a longitudinal slot divided into one or more pairs of wire gripping jaws. The barrel is integral with a second electrical contact connected to the barrel by an integral loop serving as a sloped wire stop at the entry of said barrel. Each electrical terminal is mounted on a web which interconnects partition walls. One of the partition walls is provided with a hook and a latch. Another partition wall is provided with a hook receiving recess and a latch receiving recess allowing a plurality of barrier blocks to be hooked and latched together.