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   alt.engineering.electrical      Electrical engineering discussion forum      2,548 messages   

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   Message 825 of 2,548   
   Bob E. to All   
   Re: Mains wiring question: flush vs. sur   
   13 May 13 16:38:25   
   
   XPost: sci.electronics.design, sci.electronics.equipment   
   From: bespoke@invalid.tv   
      
   > run wire between the studs under the sheet rock from a knock out of the   
   > subpanel up to the joist and down the wall under the rock where the   
   > charger will be, even though in some places it is acceptable to bore   
   > holes no more than a specific side in the studs to pass wire   
   > horizontally, I would wouldn't recommend it. If you do decide on   
   > this, use rigid with feed through stud supports that can be mounted.   
   >   
   >    THe charger should have knock outs on the back panel inside for the   
   > power entrance. Most people in this case use a rung of romix. You   
   > simply surface mount the charger with the entrance poking through inside.   
   >   
   >    I always thought a charger was an appliance and should have a   
   > rubber cord with cap to a surface or recessed receptacle.   
   >   Jamie   
      
   The 100A circuit needed by the charger (the actual charger is in the vehicle   
   -- this is really just a connector to the structure's 240 ac mains) requires   
   3 awg copper wire (4 awg ground). Some kind of conduit required, probably   
   1.25 inch. Romex not an option.   
      
   Under the 'rock is difficult: water heater & furnace are between the panel   
   and the charge station proposed location. Enough clearance over the 'rock but   
   going "sub" requires much frustration, if possible.   
      
   What's a "feed through stud support"? (Googling this gets hits relating to   
   threaded electrical stud, not a 2x4...)   
      
   Still think that surface mount except for the last 18 inches then going "sub"   
   is the best option.   
      
   These cars are 85 KWh capacities. Think "SLA charger times 10."   
      
   Thanks.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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