AutoCAD Electrical has little use for the ViewCube. Its really there for 3D modeling. There is a check box in the options that turns it off when in 2D Wireframe but brings it back if you ever change to a 3D visual style.
1. Getting to the options dialog
Press the button in the top left corner (Application Options) and from the menu choose Options.
Options is also still in the right click menu if you have nothing selected in the graphics window.
In the option dialog go to the 3D Modeling tab and clear the 2D Wireframe visual style check box. If you ever do decide to poke around in 3D the cube will come back as soon as you switch to done of the 3D visual styles.