Installing new subpanel

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  #1  
Old 11-28-04, 08:54 PM
1970Monte
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Installing new subpanel

ok i am installing a new subpanel for my attached garage it will have a 70 amp breaker feeding the subpanel with 4 gauge between the panels and from there it will split into 1 30 amp 220 circuit for the welder and 1 20 amp circuit for the regular outlets and 1 20 amp circuit for the lights
1. To power the subpanel do i neew 4 or 3 wires from the main panel (2 hot, ground and a nuetral)
2. My welder has a three prong twist lock plug what 3 wires need hooked to that is it the 2 hots plus a ground.
 
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  #2  
Old 11-28-04, 10:41 PM
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1. Four: two hots, one neutral, and one ground.
2. Yes, two hots plus ground. No neutral needed (so you can use 10/2 for this 30-amp circuit).
 
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Old 11-28-04, 11:14 PM
1970Monte
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thanks for the help but i have 1 more question is there any reason not to run 8/2 to the welder just to be safe thanks
 
  #4  
Old 11-29-04, 07:43 AM
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Larger wire never hurts.
 
  #5  
Old 11-29-04, 12:56 PM
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As John said, using larger wire doesn't hurt....as long as you make sure that the rest of the system matches. Conduit will need to be larger, the junction box will need to be larger, and you should double check that the receptacle that you are installing is designed for 8ga wire. Some L6-30 receptacles take #8, others only take #10.

-Jon
 
  #6  
Old 11-29-04, 01:20 PM
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The welder most likely wont have a 30A plug, it will have a 50. It will need a 6-50-R. What model is it?
 
  #7  
Old 11-29-04, 01:59 PM
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The only reason not to use larger wire is if it won't fit in the breaker or receptacle connectors you are using.
 
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