Well think of it as an uninsulated screwdriver, pliers, crimping tools etc. Electricians do not tend to use uninsulated tools and an uninsulated tool is just an extension of their hand. An electrician blew himself up two weekends ago in our office complex. His helper got
60% burns. The how is with the lead electrician. They were having some issue with the building popping main breakers. Electricity scares me.