10 dumb things smart people do when testing Electricity 1- Replace the original fuse with a cheaper one or incorrect size. 2- Use a bit of wire, metal or aluminum foil to get around the fuse. 3-Use the wrong test tool for the job 4-Use the cheapest testing tool on the rack. 5- Neglect wearing Safety Equipment "Safety glasses etc." 6- Work on live circuits 7- Fail to follow lockout/tagout procedures 8- Multi-task while measuring 9- Neglect test leads 10- Hang onto an old test tool forever.