If you use HNC connectors instead of BNC the center pin will 
          be protected, and will, I believe, disconnect before the 
          shield disengages. This will eliminate HV hazards on 
          disconnect
          
          
          Cortland


______________________________ Reply Separator _________________________________
Subject: Electrical Enclosure
Author:  "Ray Russell" <[email protected]> at internet
List-Post: [email protected]
Date:    12/19/96 17:32


     Greetings,
          
     We have a piece of lab equipment that uses 2kV to accelerate electrons 
     down a long tube. The top of the tube extends above the cabinet of the 
     product. This would not be too bad, except standard BNC connectors are 
     used to connect the HV to the top of the tube. This presents a shock 
     hazard if someone loosens one of the BNC connectors. The shape of this 
     item has made fabricating a metal cover very troublesome. A plastic 
     cover would have to be tooled, which means dollars and time for a low 
     volume product. So I'm looking for a way to secure these connectors 
     with a tool.
          
     Has anyone seen covers that go over a BNC connector that screw 
     together?
          
     Or...A design engineer also asked about using a cloth like material, 
     like kevlar, to cover the area that would also keep dust out. My UL 
     Engineer has not seen any material that would meet mechanical tests 
     for enclosures. 
          
     Thank you for your input. I've lost several hairs lately trying to 
     find a solution!
          
          
     Regards,
          
     Ray 
          
     [email protected]
          
          

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