Abstract: A heavy current electrical terminal (2) comprises a flat metal plate (4) having a wire slot (6) with a flared, insulation piercing, mouth (8) opening into an edge of the plate (4). An insulation piercing and wire support anvil (12) projects from base of the slot (6) which has an elongate constricted portion (18) between the mouth (8) and the anvil (12). The anvil (12) serves to support and to locate a heavy current wire (32) having insulation (34), when the wire (32) has been forced down into the portion (18) of the slot (6). The terminal (2) may be arranged in a housing having a cover with a wire stuffer bar for forcing the wire (32) into the slot (6). The walls (28) of the constricted slot portion (18) and the anvil (12) make contact with the wire (32) from three sides.