The Parlier Police Department says it happened just before 9 am along Manning Avenue in Parlier.
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Authorities say the man was taking a boom lift off of a truck when the boom arm lifted and hit live wires.
A boom lift is a type of vehicle called an aerial work platform, used to lift workers into the air to perform their work.
PG&E had to turn off the electricity before someone could approach the man.
No one else was injured.
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Manning Avenue is expected to be closed as the investigation continues.
The man has not been identified.