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  1. #1
    Join Date
    Nov 2013
    Posts
    13

    Default 100' extension cord dynasty 200dx

    yeah yeah i know its been covered 100 times. believe me, i've been up and down google and every forum available for the past few days. cannot find a straight answer.

    I need a 100' extension from my dryer outlet which is 230v30A
    to my machine.

    10/3? or 8/3? or 6/3?

    I know how to wire it, i know what plugs and receptacles i need, I know I need SOOW flexible strand AWG etc.

    thanks in advance for the assistance.

  2. #2
    Join Date
    Jul 2008
    Location
    Flin Flon & Creighton area
    Posts
    233

    Default I think you could get away with the 8/3

    Im a welder , not an electrician. I have used the lws supplied 50 foot and 25 foot 230v extension cords, they are 8/3 wire. I used two 50 footers once on a job and didnt have any issues. I guess if your running max output on the machine at that distance there could be the potential for trouble. I guess it depends on current draw and for how long you are doing it. one continuous piece of 8/3 probably would be better as there is no possibilty of the plug and connectors having a poor connection that could cause trouble. If you had to you could probly use heavier cord. Probly be best to consult an electrician and the appropriate code book.
    I have a welding addiction

    ...the only stupid question is the one you didn't ask

  3. #3
    Join Date
    Jul 2008
    Location
    Flin Flon & Creighton area
    Posts
    233

    Default ext cord.

    Nearly forgot, The stuff i described above was using the full 50 amp rated plugin setup , with the 30 amp you describe there could be an issue. Best Consult an electrician. You might be tripping breakers life a mofo if your pulling rated max duty cycle for the machine.
    I have a welding addiction

    ...the only stupid question is the one you didn't ask

  4. #4
    Join Date
    Nov 2013
    Posts
    13

    Default

    thats kind of what i figured. call a sparky.
    chances of running the machine at max duty at output are slim but its nice to have the ability.

    i have a 50A stove plug but its probably another 50' away bringing the total to 150'.

    i hate so much living in a rental house. who builds a shop without 220v service to it? some people...

    thanks for the input stu

  5. #5
    Join Date
    Nov 2012
    Location
    Northern Arizona
    Posts
    498

    Default

    What is the maximum draw on that machine? 8/3 would be your minimum but 6/3 would be safe and would allow you use it for other things down the road. The cost difference would be minimal up front verses replacing it down the road with a larger gauge wire should the need arise.
    MillerMatic 251
    CST 280 w/tig torch (for sale)
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    A rockcrawler, er money pit, in progress...

  6. #6
    Join Date
    Dec 2007
    Location
    Los Angeles
    Posts
    2,876

    Default

    Stu-
    There isn't a code for extension cords. There are guidelines and on a job site you can have OSHA rules to follow but at a home nuttin'.

    Anyhoo-
    I would buy a 10/3 100' cord from lowes Home Depot and then change out the ends.

    I don't think you want to see the price on 100' of soow cord.
    Ed Conley
    http://www.screamingbroccoli.net/
    MM252
    MM211
    Passport Plus w/Spool Gun
    TA185
    Miller 125c Plasma 120v
    O/A set
    SO 2020 Bender
    You can call me Bacchus

  7. #7
    Join Date
    Nov 2013
    Posts
    13

    Default

    Haha I've seen the prices and that's why I don't wanna f this up.

    as far as I can tell from the 200dx manual:
    Single phase 60% duty cycle
    230v input
    20a input at rated output


    further in this chart it lists max conductor length (EXCLUDING FLEXIBLE CORD OR CABLE) as 79' of 12awg


    So I should be able to run off my 30a dryer breaker/line right?
    And I assume to make up for the extra 20' or so and to make up for the "flexible cord" bs if I bump up to 8/3 I should be ok. Maybe I should put in a 30a line fuse in on the welder side to protect me from the 8/3 catching fire? Any one know if I'm assuming correctly?

  8. #8
    Join Date
    Dec 2007
    Location
    Los Angeles
    Posts
    2,876

    Default

    The 79' includes the original wiring in the wall and using Minimum wire size of 12 which is allowed for machines that have a duty cycle. There's a formula to figger it out.
    But your dryer receptacle by code will be wired with 10g so you are starting with a bigger wire than what is listed in the Miller manual.

    So whatever that length is from the panel to the dryer receptacle

    And then you want to run out 100' feet from there.

    8/3 cord will certainly do

    Look for sjo- junior - good for up to 300v- might be a little cheaper

    SO- is good up to 600v

    The W- for wet applications
    Last edited by Broccoli1; 11-03-2013 at 10:40 PM.
    Ed Conley
    http://www.screamingbroccoli.net/
    MM252
    MM211
    Passport Plus w/Spool Gun
    TA185
    Miller 125c Plasma 120v
    O/A set
    SO 2020 Bender
    You can call me Bacchus

  9. #9
    Join Date
    Nov 2013
    Posts
    13

    Default

    Thanks broccoli. Now I just have to track down some 8/3...

  10. #10
    Join Date
    May 2013
    Location
    East Tenn
    Posts
    148

    Default 100' extension cord dynasty 200dx

    I second Broc's 8/3. You shouldn't have to worry about any voltage drop if your under 250ft.

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