Electrical Energy Source

Electrical energy must be controlled via a mechanical energy isolating device that physically prevents the transmission or release of energy. Electrical energy lockout devices use positive means such as a lock and key to keep the associated energy isolation device in the safe (disconnected) position and prevent equipment energization. The use of control logic such as emergency stop buttons or gate interlocks is not an acceptable form of energy isolation. Verifying the absence of electrical energy after performing lockout/tagout can be done by attempting to operate the associated components and by observing the associated indicators. It is also a good practice to use a voltmeter and verify that there is no power by observing zero voltage in the associated circuits.