I bought a few sets of the industrial connectors from a local shop a few years back. They are good for 1000V AC. only 30 dollars per set.
I could not find multi-conductor wire/cable for the job. Most multi-conductors cable are good for low voltage only. Can I use a bundle of teflon hook-up wires, bind them together to create an umbilical cord?
though I much prefer to use multi-conductor cable.