This is a short refresher course. Control of hazardous energy sources is a requirement that organizations must lockout electricity to prevent equipment from accidentally being turned on during repair and maintenance. This requirement was introduced in September 1989. Prior to that time, lockout and tagout procedures were only required on machinery and equipment hazards. Organizations must implement this procedure for the safety of employees. This program explains the basic procedures, terminology and general requirements in controlling hazardous energy sources with an emphasis on safety.