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Electrical Code of the Day 20 February 2019

jar546

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Here is one that is often overlooked:

408.3(F)(1) High-Leg Identification. A switchboard, switchgear, or
panelboard containing a 4-wire, delta-connected system where
the midpoint of one phase winding is grounded shall be legibly
and permanently field marked as follows:
“Caution _____ Phase Has _____ Volts to Ground”
 
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