There are many different types of locking systems. There are many types of potentially hazardous energy including, electrical, thermal, chemical, pneumatic, hydraulic, mechanical and gravitational energy. All such forms of energy must be locked out, blocked or released to ensure that machinery or equipment does not turn on or move during installation, repair or maintenance. With that in mind, here are some general guidelines when it comes to padlocking that your manufacturing or industrial environment can keep in mind when ensuring proper locking of all machines, depending on how they are aligned.