Test the operating controls at the machine. Make sure no one is close enough to get hurt. Put the control button in the on position. Press all start buttons. Make sure the power doesn't go back on.
Check circuits with a voltmeter.
Perform necessary service or maintenance. Avoid doing something that will re-energize the equipment. Restore energy safely. Make sure all tools have been removed and all lines reconnected or unblocked, all guards replaced, and other workers are safely out of the way. Notify affected and other employees that the maintenance or service is completed.