Electron cyclotron (EC) waves can perform a variety of roles in ITER including start-up assist, heating to ignition, on and off-axis current drive and instability control. EC wave absorption is robust and well understood producing highly localised heating with total absorption anticipated for almost all parameters foreseen in ITER. Other advantages for ITER include the easily adjustable absorption location, the absence of damping on alpha particles, no requirements on edge plasma control for wave launching and no specific impurity generation problems. Extensive calculations with the BANDIT-3D code at Culham (1) have helped to determine the optimum EC system configuration on ITER and its capabilities in both standard ignited and 'advanced tokamak' equilibria. BANDIT-3D is a relativistic and selfconsistent ray tracing and Fokker Planck code incorporating 2D velocity space (speed and pitch angle) and 1D real space effects. Electron radial diffusion, trapping, toroidal dc electric fields and realistic magnetic geometry can all be included. Calculations in the standard scenario will be briefly discussed with more emphasis on the results for the 'advanced tokamak' regime.