One of the things that make working around electrical equipment so dangerous is that you cannot always see the hazard. Sharp edges that can cause cuts are usually visible. The same is true of rotating gears and pulleys that create pinch points. Electricity is something you cannot see. This makes staying safe around it more challenging than it otherwise might be. As a result, there are certain things that should be done ahead of time to avoid finding out the hard way that an electrical hazard was present.