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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 38,160
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Lot of questions. The current code states that you need 4 wires to the plug. The equipment ground (EGC) is not a neutral. That machine needs no neutral on the 240v side so leave it capped in the box. Ground the box and the machine through the plug. All wires need "protection" from external damage. You can run them behind a board if you wish. Or use MC cable. No splices can be made outside of a box and no boxes can be concealed.
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