In Épée, the A and B lines run up separate wires to the tip (there is no lamé). When the tip is depressed, it connects the A and B lines, resulting in a valid touch. However, if the tip is touching the opponents weapon (their C line) or the grounded strip, nothing happens when it is depressed, as the current is redirected to the C line. Grounded strips are particularly important in Épée, as without one, a touch to the floor registers as a valid touch (rather than off-target as in Foil).