Shujinko
Senior Member
I have a Switchboard that is feed by 3-500KW generators. The switchboard/generators back up a campus utility grid. When the utility company feed is down for an emergency/natural disaster this feeds power to the utility lines on campus. The switchboard/generators are rated at 480Y/277V and feed a step-up transformer 480Y/277V Pri: 12470GY/7200 Sec. In the transformer, the primary side neutral is tied to ground and the high/low side (Ho-Xo) neutral terminals are tied together. Do I still need to tie neutral/ground in the switchboard or is that considered taken care of with the neutrals being connected to ground at the transformer?
The Switchboard and generators are customer owned.
The Switchboard and generators are customer owned.