I do not put VFDs in cabinets at all - use masses of them. The ones we use are IP66 and they go on a stick alongside the motor - you can hose them safely. This means you only have to use a metre or so of that very expensive shielded cable as well. As much of my work is swimming pools everything has to run on a 30ma RCD - people in water. The drives I use are Australian designed and made and have a low loss filter system. I have 75kW drives running on 30ma RCDs.