Reply from: Bob If the wiring is inside the VFD itself the wiring is the manufactures call. Inside the VFD the low voltage can be tied to in the same bundle as the 120 if the manufacturer so decides and, in fact, it often is. However, the low voltage and the high voltage must enter the VFD in separate conduits or cables. In general the manufacturer takes responsibility for the wiring inside their devices. However, local codes almost always insist that the device have a listing label or laboratory certification.. When wiring these devices ALWAYS follow the manufacturers instructions. Added wiring, such as bypass starters, are under the NEC and the AHJ. . |