safety – lockout

every jobsite where you are potentially exposed to live equipment ,should implement a lock-out procedure to ensure that you are protected from electrocution hazards. this is a guide from worksafe, your site may be somewhat different ,but should be in compliance. if it is not ,contact the hall, and talk to your supervisor.
http://www.worksafebc.com/publications/health_and_safety/by_topic/assets/pdf/lockout.pdf