The answer is B: The machine or piece of equipment was not completely shut off
Machines that breakdown inevitably need to serviced. According to OSHA, it is not enough to shut them off while making repairs. You need to have power sources removed, locked out and isolated from the source to prevent LO/TO hazards. It is only under non-routine activities like maintenance, repair, set-up, or removal of jams that injuries or death can occur. Serious injuries have happened especially when someone thought that the machine was safely shut off. LO/TO programs protect you and others by making sure that the machines remain completely, temporarily off. These programs make sure that all controls are in off position and verifies that all moving parts like gears and flywheels have come to a complete stop.
