Disconnect doors provide a means to mount flange-mount disconnects to PROLINE™ enclosures. Steel doors are 14-gauge and painted with RAL 7035 light-grey textured polyester powder. Hinged mullion provides unobstructed access to interior, thus easing equipment installation. Disconnect mullion is hinged to provide easy disconnect installation and maximum access to subpanel. Removable door bar is included on disconnect door. A flush handle with defeater operates an internal 3-point latch system on disconnect door and latches to the disconnect mullion. Interlocking is provided from master door to disconnect mullion. The disconnect mullion and disconnect door include 140° hinges and are gasketed to maintain enclosure integrity.