I remember (barely) from my Navy days as a shipboard electrician that for our shore power connection we had 3 3Ø 4W 400A cables that had lugs at one end and large pin connectors at the other, though there was a threaded sleeve at the pin connector end to keep them fully engaged. Kind of a pain to drag around, but relatively trouble free otherwise.

Radar

There are 10 types of people. Those who know binary, and those who don't.