Plug Fuse Box Cover Units - Fuse Accessories - Grainger If you are searching for a way to protect a motor in a HVAC unit, Grainger offers a plug fuse and fuse box cover to meet your needs. Whether you need to install a plug fuse box cover on a new heating or AC unit or complete a major electrical project, Grainger can help you find the right fuse cover. Fuse Box Covers - CARiD Fuse Box Cover (W0133-1627374-APA) by URO Parts®. This superior electrical part by URO is a great alternative solution to the costly factory equipment that will help you restore smooth and efficient operation of your vehicle. Thoroughly..