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Thread: New CNC from China Need to hook up 220v wire and plug, to plug in.

  1. #13
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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Quote Originally Posted by Toinvd View Post
    I am from the Netherlands, here we use a two pin plug for NOT grounded ( safety ground ) systems. and a three pin plug for grounded systems.
    because these plugs can be reversed, you never know which pin is going to L1 and which to N but the safety ground is always the same.
    In this case safety ground should be connected to the chassis ( Cabinet ) and the other two to L1 and N
    If you know which one is the HOT pin then connect that to L1 and the neutral to N and still always connect the ground to the chassis lug.

    EDIT remark !!!! I agree with MACTEC54 safety first and stick to the local rules !!!!!!!!!!!!!
    In the NA they don't have a Neutral for 240v single phase they have 2 Hot wires each being 120v they are 180 degrees out of phase, ( so to make this very simple ) each hot takes turns at being neutral, so this works out to be the same as yours except you have ( 1 ) Hot wire and a Neutral and a Ground for a piece of equipment like this, this machine is missing the Ground part which it needs before it is put into service the Hot wire part is fine you just connect the ( 2 ) input terminals L1 and N with the 2 Hot wires used in NA ( North America )

    Mactec54


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Every machine I have Imported from China has the grounding conductor and ground plug correctly installed. Chinese 220 volt does not need a neutral, the 2 USA L1 & L2 wires hook directly up. Please have a qualified electrician, (licensed) to do the hook up for you. Do not rely on what someone tells you on the internet.

    Added: Yes, I did need to change the plug on the end of the cord.

    Last edited by wmgeorge; 05-24-2019 at 06:41 PM.
    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Thank you guys for the advice. I have wired up the two 120 legs, one to L1 and one to N, and the ground to the ground lug on the cabinet, but I will not plug it in until I have a qualified industrial electrician give it a look. I'm in Canada. I believe our code is similar to the US.



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    Quote Originally Posted by neowalla View Post
    Thank you guys for the advice. I have wired up the two 120 legs, one to L1 and one to N, and the ground to the ground lug on the cabinet, but I will not plug it in until I have a qualified industrial electrician give it a look. I'm in Canada. I believe our code is similar to the US.
    The sad part about it, unless he does industrial wiring he may not have a clue.

    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    I'm in Windsor and we have several electrical companies in the area that specialize in industrial work. We're right across from Detroit so there is a lot if automotive, and automation companies here. I just need to find one who is willing to work with a Mr small potatoes guy like me. I'm trying to get a business started but right now I'm just a guy in his garage with a day job.



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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Well until I retired I held a Masters license, but I did not see the need to pay $300 USD every two years and maintain a bond and Ins after that. I am 99% sure your good to go as you have it wired. But I am not standing in front of your machine and Inspected the wiring myself. I am current with the NEC Code however and I have had Chinese machines in the past few years or so. Good luck!!

    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Here are a couple pictures of the mains hookup in my cabinet. Red wire is not used. (bought the wrong cable at Lowes)
    For what it is worth, my salesperson confirmed it is correct.
    Ok never mind. I guess I cannot upload pictures.

    Last edited by neowalla; 05-25-2019 at 09:53 AM. Reason: uploaded pictures nowhere to be seen.


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Quote Originally Posted by neowalla View Post
    Here are a couple pictures of the mains hookup in my cabinet. Red wire is not used. (bought the wrong cable at Lowes)
    For what it is worth, my salesperson confirmed it is correct.
    Ok never mind. I guess I cannot upload pictures.
    To attach your photos, at the bottom of this window reply/reply with a quote open then, there is a tab Go Advanced scroll down and you will see another tab, manage attachments, open that tab and you will see where and how to attach each photo and upload

    Mactec54


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    New CNC from China Need to hook up 220v wire and plug,  to plug in.-220v-jpg
    The black and white are the two legs of 120 from the 220v circuit.
    The ground is connected to the cabinet.
    I plugged it in and flipped the breaker and nothing happened, but I still want to have a licensed industrial electrician look it over before I go hitting any power buttons.

    New CNC from China Need to hook up 220v wire and plug,  to plug in.-ground-jpg

    Attached Thumbnails Attached Thumbnails New CNC from China Need to hook up 220v wire and plug,  to plug in.-220v-jpg   New CNC from China Need to hook up 220v wire and plug,  to plug in.-ground-jpg  
    Last edited by neowalla; 05-25-2019 at 02:28 PM. Reason: had to scale down the images.


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Quote Originally Posted by neowalla View Post
    New CNC from China Need to hook up 220v wire and plug,  to plug in.-220v-jpg
    The black and white are the two legs of 120 from the 220v circuit.
    The ground is connected to the cabinet.
    I plugged it in and flipped the breaker and nothing happened, but I still want to have a licensed industrial electrician look it over before I go hitting any power buttons.

    New CNC from China Need to hook up 220v wire and plug,  to plug in.-ground-jpg
    Cover the white wire with black or Red tape or shrink tubing just at each end and that part will be fine the Grounding is not and will have to be reworked

    Mactec54


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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    First remove the white wire from any Hot 240 volt line feeding the machine. White should never be used for Hot or live wiring. Use the Red wire for the other side of the 240 volt line. In other words Black on one hot and Red on the other hot. Green or bare should go to the equipment ground in the machine and the ground buss in the power or service panel.

    If you did not have the Red wire you could mark the White with either Red or Black tape or paint at both ends, and be legal here in the US, not sure about Canada.

    To me it looks correct or will be when you change the wire colors. Wether or not you turn the power on is up to you but your supplier told you it was ok??

    Last edited by wmgeorge; 05-25-2019 at 03:41 PM.
    Retired Master Electrician, HVAC/R Commercial. FLA Saturn 2 4x4 CNC Router Mach4 Kimber 1911 45ACP


  12. #24
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    Default Re: New CNC from China Need to hook up 220v wire and plug, to plug in.

    Yes my supplier said it was correct but I have someone coming out to look at it just so I am sure. I made the change from white to red as you suggested. The cable I bought from Lowes had black, red and white lines. I'm always thinking in 120v terms so I used black and white and left the red unused. I switched it leaving white unused now. So as long as one leg goes to L1 and the other goes to N, there is 220v between them correct? Now I need to figure out the grounds. I wish I could find a book on CNC electrical/electronics.



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New CNC from China Need to hook up 220v wire and plug,  to plug in.

New CNC from China Need to hook up 220v wire and plug,  to plug in.