One of the more popular electrical services that is supplied to medium-size commercial buildings is the Wye or Star configuration. The name comes from the transformer’s secondary winding configuration ...

One of the more popular three-phase electrical services supplied to medium-size commercial buildings is the Wye or Star configuration transformer. The name comes from the transformer’s secondary ...

All questions and answers are based on the 2017 NEC. Underlined text indicates a Code change. Q. What is the reason stated in the NEC for connecting electrical systems to the earth (grounding)? A.

I have found and corrected several instances of privately owned high-voltage systems with unjacketed primary concentric neutral (exposed bare neutral conductor on outside of the cable) where the ...