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  1. #1
    Can anybody shed some light on what wire gauge / mm / mm2 wire should be used for control panel wiring, 240v AC, 24v DC and signal wires?

    Some articles mention 14 AWG for mains AC and 16/18 AWG for DC / signal, but then it gets confusing with mm and mm2.

    Thanks again

  2. #2
    Quote Originally Posted by Dwayne Dibbley View Post
    Can anybody shed some light on what wire gauge / mm / mm2 wire should be used for control panel wiring, 240v AC, 24v DC and signal wires?

    Some articles mention 14 AWG for mains AC and 16/18 AWG for DC / signal, but then it gets confusing with mm and mm2.

    Thanks again
    0.5 mm or 0.75mm is more than enough as there is hardly any current drawn. for the DC low voltage side ..Clive
    Last edited by Clive S; 15-03-2015 at 03:12 PM.

  3. The Following User Says Thank You to Clive S For This Useful Post:


  4. #3
    Thanks Clive, so I'm assuming 0.5 and 0.75 are mm2. Would that equate to the top two items on this page http://www.csecables.com/acatalog/Tri-Rated-Cable.html?

  5. #4
    Quote Originally Posted by Dwayne Dibbley View Post
    Thanks Clive, so I'm assuming 0.5 and 0.75 are mm2. Would that equate to the top two items on this page http://www.csecables.com/acatalog/Tri-Rated-Cable.html?
    Yes they are fine but for the signal cables to the limits etc I would go with screened ie 3 or 4 core CY 0.5mm type I have used cat5 inside the control box for the BOB to the drives. ..Clive
    Last edited by Clive S; 15-03-2015 at 10:15 PM.

  6. #5
    OK, can someone just cast their eyes over the main wiring for my cabinet ( attached image ), a little bit of reverse engineering from other diagrams on here and adapted to fit my needs i think?

    Thanks
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #6
    24V seems low for the power supply to the drivers. What is the max that the drivers can take and which motors are you using? ..Clive

  8. #7
    Quote Originally Posted by Clive S View Post
    24V seems low for the power supply to the drivers. What is the max that the drivers can take and which motors are you using? ..Clive
    Clive, see this thread regarding the PSU http://www.mycncuk.com/threads/5541-PSU-question from quite a while back when i started. I have upgraded the original drivers to these http://www.planet-cnc.com/files/MotorDriver25A-32.pdf now. It runs fine ( i presume ) just needed to move the electrics off the bench into a dust free environment.


    Thanks again
    Last edited by Dwayne Dibbley; 05-04-2015 at 08:22 PM.

  9. #8
    The drawing is a bit ambiguous for me I would prefer more of a schematic. Do you really need 4 PSU 2 x 24 V 1 x 9v and 1 x 12V.


    I don't know how big your machine is but its a shame to use only 24V psu and those drivers because your machine might have so much more potential if they were changed.
    I have bumped this up so that Dean might see it and chime in. Clive

  10. #9
    Quote Originally Posted by Clive S View Post
    I have bumped this up so that Dean might see it and chime in. Clive
    Ding Dong Ding Dong.!! . . . . 24Vdc is correct for these drives Clive they only Take 30Vdc Max so don't want to release the Magic smoke.!!

    Quote Originally Posted by Dwayne Dibbley View Post
    OK, can someone just cast their eyes over the main wiring for my cabinet ( attached image ), a little bit of reverse engineering from other diagrams on here and adapted to fit my needs i think?
    Ok well see a couple of things.

    Don't see the latching Relay wiring.?

    Don't see the point of the Green 240V Led just use Red Led that's on all the time Power is On. Use the Green Led for indicating System is Reset and Ready. I'd Also use 24V leds.

    Don't Like the fact your using 1x Mcb for 3 x Psu all different sizes. You will be better having the smaller ones on separate Glass Din rail fuses.
    Last edited by JAZZCNC; 06-04-2015 at 09:55 AM.

  11. #10
    ill upgrade to real drivers one day :), regarding the other PSU's the 9v powers the USB controller, and the 12v spins some fans on the drivers and the din 24v powers the estop thingy to kill power to the other psu's

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