I agree with many of the comments here. My experience is that the Factory owners have Engineering staff... that usually/should direct/design stuff.. kind of how they get around the licensing angle here.. some bosses think anyone can change 277v ballasts....then when they don’t work...call myself or my competent unlicensed colleague whom has multiple associates degrees in electrical/electronics to fix it... there is sooo much save a penny stuff that creates hazardous situations you have to watch yourself..in the end that’s the only person you can control. And usually even so called qualified electricians from union training aren’t licensed...just means you can pass a test.
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