In the past few years, I have encountered these lockout devices for light switches. I even witnessed an OSHA Outreach Trainer using a picture of a similar device in a 10-hr OSHA course during his LOTO presentation. Now I know that a light switch can be wired in a special way that could make it an isolation device, but I would bet that 99.99% of light switches are NOT wired such that when they are in the OFF position, they are a POSITIVE MEANS of energy isolation. Light Switches are CONTROL DEVICES, and OSHA’s definition of an “Energy Isolating Device” states it is…