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Reply by Raymer

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Posted on New plug for my Pot belly jointer, 3 wire

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Raymer

92 posts in 966 days


#1 posted 03-09-2019 10:04 PM



3 wire 220/240V has no neutral. So it doesn t matter which of the 240V wires (Black/white) goes to which pin (X/Y). The only one that matters is the ground, or green wire. It should be attached to the rounded single pin. For a locking style connector, the ground pin is typically the pin with extra hook on it.
The only time you worry about red wire is when wiring up a 4 wire circuit, as then you have neutral – which is then the white wire, and X/Y are black/red.

So to be clear, if your tool only has 3 wires, put the black/white on X/Y and green on ground.

If the tool wiring has all 4 wires, then you may need an electrician to upgrade your house outlet to 4-wire.

- CaptainKlutz

Thank you, the tool is my new 37-301 delta 8” jointer. It is 3 wire 220, but the plug is just the wrong type. It has this one:

However my outlet is this;

So I bought this:

My tool does only have 3 wires and I knew where ground wire goes on the new plug, just wasn’t sure where which connector took the white wire and which took the black.

-- -Measure once, cut twice, cut once more for good measure.


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