Reply by CaptainKlutz

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

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3743 posts in 2382 days

#1 posted 03-09-2019 09:39 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.

-- If it wasn't for bad luck, I wouldn't have no luck at all, - Albert King - Born Under a Bad Sign released 1967

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