An electrical connector (100 min ) has a plurality of contacts (10) positioned in a dielectric housing (20 min ) for terminating respective electrical wires (1) and a plurality of wire retaining grooves (70) on the housing (20 min ) for receiving and retaining respective electrical wires (1). Each groove (70) is provided with projections (72a,72b) on respective sidewalls (74). The projections (72a,72b) are positioned at different depths relative to each other.
