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My home wiring is copper/white/green but the new dishwasher is black/white/green. I thought copper meant ground so I'm a little confused by the green being ground and what should connect to what.

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    Your general location might matter. North America orange/copper can be used as a hot/black wire colour, but unusual. Would be found more with conduit than wire cable system. Ground can be only green colour(yellow stripes allowed) or bare(no insulation/copper)
    – crip659
    Jun 7 at 22:05
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    The insulation is ORANGE. The wire inside it is copper. "Copper" as a wire color implies bare uninsulated wire (or wire that should not be in your house walls, like cheap clear speaker cables)
    – Ecnerwal
    Jun 8 at 1:53

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If you are in the US, your "copper" is really orange and designates a hot wire. Connect it to the black on the DW. ( be sure the power is off)

White to white

Green to Green

Done.

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