Re: VFD wire type
From my experience of installing VFD's over a number of decades, I have never used shielded cable from VFD to motor, for the most part, what I have used is liquid seal metallic flex conduit, with TEW/MTW in the flex, the 3ph conductors need to be twisted together with the ground conductor ran along side them (untwisted).
This ends up with the conduit, which is essentially a shield, grounded both ends.
The earth conductor goes to the VFD and continues on to the motor frame.
the effect of grounding and bonding both ends essentially eliminates ground loops.
The definition of a ground loop, BTW is when there is a potential difference between one point of ground and another.
The oldest motor I fitted a VFD to was originally installed in 1959!!
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.