A temporary insulating switch cabinet cover is installed in the doorway of an electrical switch cabinet having high voltage energized switchgear in order to enable a worker to perform maintenance tasks on the switchgear while the switchgear is energized. The cover is designed to expose a part of the energized switchgear while covering and isolating another part of the energized switchgear so that a worker is enabled to work on the exposed part of the energized switchgear while being protected and insulated from the unexposed covered part of the energized switchgear.