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The wiring diagram identifies the fan motor and compressors wire colors and functions a wiring chart on the fan motors case also identifies the fan motors wire colors and each wires function the letters stamped into the compressors housing near the wire terminals identify each terminal function. There you will see the wiring diagrams for motor control relays when changing the voltage of the motor be sure to see the wiring diagram on the motor label and make sure of the circuit voltage which is supplied to the motor matches one of the optional voltage configurations of the motor how to wire a 3 phase air compressor . Assortment of wiring diagram for air compressor motor a wiring diagram is a streamlined conventional pictorial depiction of an electric circuit it reveals the elements of the circuit as simplified shapes and the power and signal links between the devices. While wiring a compressor there are a number of things to consider for a proper electrical hook up a main concern is the amperage requirements of the compressor this dictates the size of the wires another factor is if the compressor is single phase or three phase power this dictates the configuration of the wiring. Electric motor start run capacitor instructions how to hook up an electric motor start or run capacitor this article gives electric motor start run capacitor installation wiring instructions for electric motor capacitors designed to start run an electric motor such as an ac compressor heat pump compressor or a fan motor and how to wire up a hard starting air conditioner compressor