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Colours mean something in the IEC309 Power Connector world.  Although, there are exceptions to the rule, here are the basics for North America.  We will cover more about clock position in a future Newsletter.

Yellow - is 120 volts
Black - is 600 volts
Red is 480 volts or 415 volts
Blue is 250 volts
Orange is 120/240 volts

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