The electrical field within the machining area of a WEDM machine was simulated using COMSOL Multiphysics software. In this document, we share the results of this simulation, in particular the geometry considered Figure 5: Electrical field distribution while machining a) with negative polarity of -10 V, b) with positive polarity of +5 V and c) with positive polarity of +2 V Figure 6: Worktank geometry considered and electrical field distribution during storage with an external applied voltage of -0.5 V. 1) when the WC-Co workpiece is connected to the machine ground with: a) brass wire also connected to the ground and b) wire removed. 2) when the WC-Co workpiece is insulated (floating ground) with the c) wire connected to the ground, d) wire at floating ground and e) wire removed.