If you haven’t seen or heard yet, the 2020 edition of NFPA 70 ®, National Electrical Code® (NEC ®), is set to hit the shelves this fall. As we at the National Fire Protection Association (NFPA) are ...

The typical industrial or commercial facility has load-side distribution at 480V, with 480V transformer (s) center-tapped to provide 277V for lighting. Branch-circuit panel supply transformers step ...