Note: If a tag is used without a lockout device to isolate an electrical circuit, then it must be supplemented by one additional safety measure such as the removal of an isolating circuit element, blocking of a controlling switch, or opening an extra disconnecting device.
Caution: Return operating control(s) to neutral or "off" position after verifying the isolation of the equipment.
Note: A qualified person must verify that all electrical circuit parts exposed during service or maintenance are deenergized through the use of test equipment. This test must also determine if any energized condition exist due to inadvertently induced voltage or unrelated voltage feedback even in circuits that have been deenergized and presumed safe. If the circuit to be tested is over 600 volts, the test equipment must be checked for proper operation before and immediately after the test.
Source: MaintainX (Community Member)