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Tuesday, July 2, 2019
Question:
Can you leave 4/0 cable conductors as "pig tails" hooked to the load side of a 3 phase 480v transformer? Is it against code to leave them hooked up and hanging inside the transformer after line power has been restored?
Erik Briggs
A
Answer:
Hey Erik thanks for your question. Yes, live parts operating at 50 to 1000 volts must be guarded against accidental contact as stated in 110.27. If the energized conductors including any stripped ends (Live Parts as defined in Article 100) are inside the transformer enclosure they are considered guarded.