This is a story from Wayne Burgess, a self-employed Electrician.

"A maintenance man was working on a 480 volt roof top air conditioning unit at an industrial complex. The maintenance man decided that this job was more than he could handle. So, he called the company that I worked for and requested a technician. We sent an electrician with over 15 years of experience to the job site. The electrician after reaching the roof, realized he had left his tester in the truck.  Rather than go back to the truck to get the tester, he yelled to the maintenance man to ask if the breaker for the unit had been shut off. He replied "yea it's off, you're all set." The electrician put his hand behind the electrical attachment point to check connections, the 480 volts from the unit that was still on burnt his hand severely. He was taken to the hospital where he underwent surgery to try to repair his hand. The Electrical Company had a very strict safety policy in place, the electrician not only was injured that day, but he also lost his job!

 Remember this story the next time you don't want to take 20 minutes to walk down and get your tester.

Here is a classic example of why people need to use Lockout/ Tagout. This situation could have been avoided a few different ways. First, test it for power...wait, it was downstairs.  Second, check the breaker yourself. Then you would know for sure that the correct breaker had been turned off. Third, use the OSHA Lockout/ Tagout procedures. Create a safer working environment.

Thanks to Wayne for sharing this story with us. I think everyone can apply these same practices to many different situations. Remember, it's your life. Safety Matters. Take the time. It could save your life.