Many of these accidents can be prevented if the energy sources are isolated, and locked or tagged out. The OSHA regulation requires that employer have documented clearance procedures to ensure that machinery does not start up while an employee is working on it. The most common form of energy is electrical, but mechanical, hydraulic, pneumatic, chemical, and thermal energy can also be dangerous. Energy can also mean movement or the possibility of movement. There are two types of energy.
Kinetic energy is the force caused by the motion of an object.
A spinning wheel is an example of kinetic energy. A spring under tension is an example of potential energy. Garbage compactors and gravel crushers are also examples. Potential energy can also be the potential energy from suspended parts or springs. To keep equipment from being energized during repairs or maintenance, it can often be locked out .