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 Wiring 50 amp power cord to truck?

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chasendad

  • Total Posts: 95
  • Joined: 12/10/2011
  • Location: Burleson, TX
Wiring 50 amp power cord to truck? Wed, 01/2/13 6:22 PM (permalink)
I'm going to use 4 wire 50 amp RV plug on the truck I'm building and cannot find any diagrams for the wiring.. I'm pretty sue, Red & black go to the line terminals in the breaker box and the green and white go to the ground/ neutral bar.  Can anyone tell me if I'm right on this/// I have lots of customers thru my business but no electricians to ask this to..
 
#1
    CCinNJ

    • Total Posts: 7762
    • Joined: 7/24/2008
    • Location: Bayonne, NJ
    Re:Wiring 50 amp power cord to truck? Wed, 01/2/13 6:28 PM (permalink)
    You can always check (or double-check) on this forum...

    http://www.electriciantalk.com/
     
    #2
      RodBangkok

      • Total Posts: 385
      • Joined: 10/12/2008
      • Location: Bangkok Thailand, XX
      Re:Wiring 50 amp power cord to truck? Wed, 01/2/13 11:37 PM (permalink)
      Here is a reference for ac wire color standards.  Make sure you understand proper grounding and how to test for it.
       
      http://www.allaboutcircui..com/vol_5/chpt_2/2.html
       
       
       
      #3
        edwmax

        • Total Posts: 2015
        • Joined: 1/1/2007
        • Location: Cairo, GA
        Re:Wiring 50 amp power cord to truck? Thu, 01/3/13 9:54 AM (permalink)
        That is correct.    With volt meter, from hot to hot you should read 240 v (+/-, line voltage drop).   Hot to ground or neutral will read 120v +/-.
         
        If you have additional questions, this site should be able to help and has pictures.  http://www.bobhatch.com/electricStuff/30to50amp.htm
         
        #4
          chasendad

          • Total Posts: 95
          • Joined: 12/10/2011
          • Location: Burleson, TX
          Re:Wiring 50 amp power cord to truck? Thu, 01/3/13 4:41 PM (permalink)
          Well the 1 electrician customer I have that has owed me money since August stopped by to pay today so I told him he had to answer this question as interest..
          He said my drawing is correct but I need to add a wire from the neutral bar to the connection of the green  ground wire to the box..
           
           
          #5
            edwmax

            • Total Posts: 2015
            • Joined: 1/1/2007
            • Location: Cairo, GA
            Re:Wiring 50 amp power cord to truck? Thu, 01/3/13 6:04 PM (permalink)
            chasendad


            Well the 1 electrician customer I have that has owed me money since August stopped by to pay today so I told him he had to answer this question as interest..
            He said my drawing is correct but I need to add a wire from the neutral bar to the connection of the green  ground wire to the box..


             
            That is not correct.   ... You only need to connect the neutral to the equip ground at the main service panel where the utility Co entrance is.  This is not the case on your truck.
             
            Think about it.   Your incoming  wires are red, black, white (neutral), & green (ground). If the white (neutral) & green (ground) are cross connected then one wire is useless & unnecessary.     The white (neutral) is a current carrying wire. The green (ground) should not have current though it except in a short to ground.    These wires should not cross connect in your box or any place between your box and the main service panel.
             
            At the main service panel the ground bar (green) is directly connected to a ground rod into the earth.  This is where the neutral connects to earth ground and returns to the utility Co. by cross connecting to the ground bar.
             
            On your truck, you do not have a ground rod connection.  This is the reason for the 4-wire shore cord, to provide separate paths (wire) for the neutral & ground back to the main service box.
            Cross connecting these two wires in a sub-panel is a safety and a fire hazard.
             
            #6
              THE WILD DOG

              • Total Posts: 1465
              • Joined: 1/12/2010
              • Location: Hunt Valley, MD
              Re:Wiring 50 amp power cord to truck? Fri, 01/4/13 12:32 AM (permalink)
              i have 50amp in my truck, wired it myself... hang on, i'll post a pic of the box
               
               
              #7
                edwmax

                • Total Posts: 2015
                • Joined: 1/1/2007
                • Location: Cairo, GA
                Re:Wiring 50 amp power cord to truck? Fri, 01/4/13 8:58 AM (permalink)
                Oh ... BTW ... I recommend making a ground connection from the panel ground buss to the truck frame & service body (both).   This is to prevent electrocution should a short occur to the truck & you step out of the truck; or a customer at the service window puts his hands on metal while standing on the ground.     ... The rubber tires insulates you while in the truck; but any one standing on the ground will complete an electrical path though his body.
                 
                #8
                  chasendad

                  • Total Posts: 95
                  • Joined: 12/10/2011
                  • Location: Burleson, TX
                  Re:Wiring 50 amp power cord to truck? Sat, 01/5/13 6:12 PM (permalink)
                  Wild dog I'd like to see the picture...
                   
                   
                  #9
                    chasendad

                    • Total Posts: 95
                    • Joined: 12/10/2011
                    • Location: Burleson, TX
                    Re:Wiring 50 amp power cord to truck? Sun, 01/6/13 11:20 AM (permalink)
                    Heres my final hookup on the 4 wire, ran a wire to under the chassis as a ground also
                     
                    #10
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