While current rating is usually the main consideration in selecting a fuse, voltage rating is also important. For example, if you use a fuse in a circuit that is rated at 208 VAC and you get the fuse from your local automotive store, there's a chance you may have a fire in that equipment. A fuse that has been flashed like this can handle more current than the original fuse and cause a fire. Wire size is also important and it is the third party testing laboratory's responsibility to check to make sure that the wire size is correct for the application. As for electrical shock hazards, the inspector is looking at isolation, grounding, and insulation issues.
Grounding is the most important.
These are all things that can cause hazards to your employees.