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3 phase electrical plug question

cbxjeff
I need to replace the plug on my Bridgeport mill to one that's compatible with the new receptical. Am I correct that I only need to be sure that I have the ground in the correct position and there is no order of the three hot wires?
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Comments

8 comments

Date Votes
  • lkannes
    That is correct. Once wired bump it over to check the rotation direction. If it is back-wards, just swap any 2 wires and it will be the correct direction.
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  • Chief Shaway
    lkannes wrote:
    That is correct. Once wired bump it over to check the rotation direction. If it is back-wards, just swap any 2 wires and it will be the correct direction.
    Correct, as long as you don't swap the ground. ;)
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  • cbxjeff
    Thanks for the replies guys. A follow-up question ... my single phase supply has 3 hot wires and a neutral naturally. I have that neutral connected to a true earth ground because I've been advised about ground loops. I should add that my shop is fed by my home which is 100 yds away. Have I done anything wrong? I never have understood the difference between neutral and ground. Thanks guys. I would just hire a real electrician to do this but being on a fixed income money is a problem. Electrocution doesn't sound good either!
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  • Tcatt
    cbxjeff wrote:
    Thanks for the replies guys. A follow-up question ... my single phase supply has 3 hot wires and a neutral naturally. I have that neutral connected to a true earth ground because I've been advised about ground loops. I should add that my shop is fed by my home which is 100 yds away. Have I done anything wrong? I never have understood the difference between neutral and ground. Thanks guys. I would just hire a real electrician to do this but being on a fixed income money is a problem. Electrocution doesn't sound good either!

    OK, first I never give advise on boards on technical issues, cause its hard to get all the details, so no detail.

    Earth Ground is for Safety; Neutral and Ground are not connected in the field, for Safety Reasons. Yes, you should have a competent electrician look at your wiring and equipment. That also goes for your three-phase setup. How are you getting three phase to your equipment : Utility, or Inverter? Never mind, get an electrician with industrial experience with three phase to look over your equipment.
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  • dav1965
    I live in NC and i do not know any house that has 3 phase going to it so how can you run 3 phase from your house?
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  • gunndealer28518200
    I have a home here in NC with 3 phas current.
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  • Horse Plains Drifter
    dav1965 wrote:
    I live in NC and i do not know any house that has 3 phase going to it so how can you run 3 phase from your house?
    I think he has single phase incoming from his house, then runs the single phase through a fake-a-phase.
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  • cbxjeff
    Yes, I have a rotary phase converter installed in the shop.
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