connectCAD uses the current drawing units to calculate all dimensions. Before you start your project decide on the units and the grid, and set them up. Changing units in the middle of a project could work but we cannot guarantee that. We also make sure that connectCAD follows the Vectorworks grid settings so that all graphics are created on the current snap grid. i.e. the spacing of socket placements follows the grid. Again it is much better to set up the grid at the beginning and not change it.
Cable length calculations are in meters when a metric units system is selected, and feet when non-metric units are used.