Electrical conductances of tetraalkylammonium iodides, R(4)NI (R = butyl to heptyl), in different mass % (20 to 80) of carbon tetrachloride (CCl(4)) + nitrobenzene (PhNO(2)) have been measured at 298.15 K. Limiting molar conductances Lambda(0), association constants K(A), and cosphere diameter R for ion pair formation in the mixed solvent mixtures have been evaluated using the Lee-Wheaton conductivity equation. However, the deviation of the conductometric Curves (Lambda versus root c) from linearity for the electrolytes in 80 mass % of CCl(4) + PhNO(2) indicated triple ion formation, and therefore corresponding conductance data have been analyzed by the Fuoss-Kraus theory of triple ions. Limiting ionic molar conductances lambda(+/-)(0) have been calculated by the reference electrolyte method along with a numerical evaluation of ion pair and triple ion formation constants (K(P) approximate to K(A) and K(T)) the results have been discussed in terms of solvent properties and configurational theory.