From: lfsheldon@gmail.com   
      
   On 8/22/2014 15:10, mroberds@att.net wrote:   
   > I've worked hot on DC systems from 12 V to 144 V, with available fault   
   > currents of way less than an amp (telephone) to several hundred amps   
   > (starting and traction batteries).  It's not my favorite thing in the   
   > world to do, but it's possible.  You can get tools with insulated   
   > handles rated to a few hundred volts (expensive), or you can just wrap   
   > the tools you have with electrical tape (cheap).   
      
   I used to manage projects in a computer center (in the days that a   
   computer center housed ONE computer with maybe one auxiliary computer in   
   attendance)--the electrician that won all of the bids we put out (or got   
   the emergency work order to repair work done by others) would never work   
   on "old" work that was not "hot".   
      
   He had lots of wrapped or plastic tools to do the work with.  His   
   argument was that if the work MIGHT be "hot" he wanted it to be hot   
   because it kept him in the right frame of mind and removed the risk of   
   somebody energizing it without his knowledge.  ("Hot" meant 480V, by the   
   way.)   
      
   I've worked around "hot" stuff a lot--it really is not a big deal if you   
   work safely.   
      
      
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