We have a 480-208/120v, 1000/1333 KVA transformer with load running close to its OA rating. We decided to install custom made fans, such that air is forced to go through windings. I know this might not equal it's FA rating, but how can we calculate new rating? we can measure all peremeters...
Anyone knows a good industrial brand for Sag Protection, using energy storage devices such as capacitors, flywheel, or battery for > 1000KVA applications?
Our contractor installed a multiconductor cable in a tray. I was told per NEC, we have to increase size of existing bare tray grounding cable because it's smaller than our newly installed cable equipment ground. Is that correct? Each cable in this tray has its own equipment ground.
