I worked in a retirement home building (14 landings) in building maintenance. Elec for much was 277v. Scary darn $hit! I think the chillers was three phase 277v. I would open the doors to the breaker cabinet and it was like a friggin'magnet was pulling you in. I never got lit by it but a coworker was thrown off his ladder by it. He asked why I didn't help him while he was screaming... I told him he wasn't screaming, but the ladder was doing a jitterbug on the floor.
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