free app! Download now! -Electrical Wires & Cables Trunk Cable Management System (CMS) Size Calculator/trunk sizer is a simple application capable to identify the suitable trunk containment size which can accommodate the selectable standard and filling the overall diameter for non-standard copper and aluminum wires & cables with entering their quantities, the resulted trunk size capable to accommodate total cross-sectional area of all cables not greater than 45% of the cross-sectional area