In the project described here, the main mechanical effects associated with the circulation of three-phase short-circuit currents in low-voltage electrical panels with busbars in non-staggered configuration using IEC standard criteria can be identified, in addition the critical design points with which during this process, it is possible to have a previous vision of this type of phenomena in order to optimize the construction model; In the final section, the results obtained when performing deformation simulations using the COMSOL V5.3 software will be shown, measuring the quantitative values of the critical displacement of the central main bus.