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Thread: What size 220V Wiring?

  1. #31
    Quote Originally Posted by res0r9lm View Post
    Aluminum wire is becoming popular again to run to panel because of copper prices. you need a bigger size and connection need a anti-oxidant on connection like Noalox.

    Aluminum Wire amp rate
    #8 30 amps
    #6 40 amps
    #4 55 amps
    #2 75 amps
    #1 85 amps
    1/0 100 amps
    2/0 115 amps
    3/0 130 amps
    4/0 150 amps
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  2. #32
    Yeah, length of run would be my guess. Resistance is directly proportional length. And voltage is inversely proportional to resistance.
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  3. #33
    Authorized Longevity Dealer dzljon's Avatar
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    Quote Originally Posted by Bdub View Post
    Ok guys, I need some help with wire size. I'm running a new 220V wire from my basement to the garage for my LC-520D. Reading many of the threads, it looks like 220 is the way to go. I have a good piece of 10g, but I'm wondering if I really need 8g. My run is approximately 35 feet. Also, what size breaker should I use? Thanks in advance.
    I use 6 gauge and 50 amp breaker



  4. #34
    There is NEC code for welders (630.11 - 630.12) and in regards to a single welder.

    For the conductor look on the back of welder there should be a rating plate look for the I1eff value that will be the minimum ampacity needed. The value is based on a combination of duty cycle and I1max
    The ampacity conductors shall not be less than the I1eff value supplied on the rating plate
    For overload protection (breaker): Shall be no more than 200% of of conductors ampacity.


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