Sub Panel Electrical Advice

Discussion in 'Garages, Workshops & Tools' started by ultimateoffroad, Feb 10, 2014.

  1. ultimateoffroad

    ultimateoffroad Veteran Member Lifetime Gold Member

    213
    1
    Feb 21, 2010
    Friendswood, TX
    I am hoping someone here has some electrical knowledge.

    I am needing to run a sub panel to my garage to run the mig, compressor, etc. I was planning on adding a 60A but figure while I am doing it might as well just do a 100A. Question is I am planning to run two #3 one #6 and one #8. Once I get the wire in the attic does it have to be in conduit through the attic?

    Thanks for any input!
     
  2. daddio4048

    daddio4048 Veteran Member

    815
    1
    Jan 21, 2013
    Valdosta,Ga.
    Check you local codes. I personally would run it in conduit because it's 220.Gray PVC conduit is pretty cheap anyway.
     
  3. ultimateoffroad

    ultimateoffroad Veteran Member Lifetime Gold Member

    213
    1
    Feb 21, 2010
    Friendswood, TX
    I agree. Will run conduit. Now how often do I need strap it horizontal and vertical. Local just refers to the 2008 standard.

    Also, should I go out the top of the box up or out the side. Does going out the top of box create potential for water issues?
     
  4. Gary S

    Gary S Administrator Lifetime Gold Member

    20,631
    181
    Apr 14, 1999
    Bismarck, North Dakota
    Check your local wiring codes. In most places, you need three #3 wires. The neutral is usually the same size as the two hot lines. The ground can be smaller, but again, check the codes to select the correct size. I assume you are talking about copper wire. Aluminum would need to be larger than #3 for 100 amps.
     
  5. ultimateoffroad

    ultimateoffroad Veteran Member Lifetime Gold Member

    213
    1
    Feb 21, 2010
    Friendswood, TX
    Thanks Gary. I tend to side with safety so will use the 3#3. Yes on copper
     
  6. Rick WI

    Rick WI Veteran Member

    10,400
    1
    Jul 9, 2001
    Madison, WI
    And on subpanels the neutral and ground are separated. Run the neutral to an insulated bar in the subpanel and the ground to a grounded bar. Do not combine as the neutral is a current carrying conductor back to the main panel. The ground is not a current carrying conductor, unless there is a short. The ground is for safety
     

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