As "AK" said, CCl4 has no dipole moment
In other cases, the vectorial sum of dipole moments of three C-Cl bonds seems like to be more, than the same sum for two C-Cl bonds, and each of them ought to be more than one single vector.
(Not taking into account possible influence of Cl atoms on each other. Hope it doesn't have any significant effect)
CCl4 CH3Cl CH2Cl2 CHCl3