Both twisted pair and shielded wire are sufficient when wiring to the VFD's control board. Two and three-wire connections are recommended. For many drives, the minimum wire size is 18 AWG.

Figure 3 shows a sample wiring diagram of a VFD controlling one 20 hp electrical induction AC motor; the hp rating of the VFD must not exceed the hp rating of the motor. In the example shown in Figure ...

The image above is a terminal board diagram. Consult with the VFD user manual to find the function of the terminal. In most cases though, VFDs are used for their variable speed control with ...