Did some electrical/safety training in a small food-processing plant a couple of decades ago. It had an original {LA Dept of Water&Power} 800A 240V 3ø 3w corner-grounded ∆ for motors and forklift-battery chargers, with odds’n’ends 120V dry-type transformers for lighting and convenience outlets.
Later, a 400A 120/240V 1ø 3w service was added. This gave the plant three separate sets of grounded-circuit conductors [all correctly white] to keep track of. At the end of training, I had the chief maintenance mechanic sort of clear on what was what, {none there were originally hired as ‘electricians’} with the agreement that he would call me if he needed further explanation.
