I start every morning off with CQD…. keeps me in tune with the code, thanks for your service.
My Companies Pre Fab Dept installs Standard Manufacture’s Panelboards onto a painted welded steel rack with an Enclosure on top connected by 3-3” close nipples. We save money in Prefab by being in a controlled environment. Our customers love this because all the circuits of a panel are ran Up into the enclosure (# 10 THHN)( unless a larger circuit is called for) where we have 50a finger safe color-coded terminal blocks for each of the 3 phases and the Grounded Conductor (neutral). The Eq. Ground wire terminates on a bar within the panel and the same size wire up to an additional ground bar in the enclosure. Customers love this because maintenance or adding a circuit does not require taking the panel cover off and exposing employees to the higher Arc Flash Hazard that exists in the panel itself. Right Now we take the individual # 10 grounded conductors from the Panelboard neutral bar up to the terminal block.
Question: Would the code allow us to run the same size grounded conductor that feeds the Neutral bar in the panel, from the Neutral bar in the panel, to an additional Neutral bar in the Enclosure above. This would be in lieu of running 42 # 10 grounded conductors from the neutral bar in the panel to the enclosure above.
Thanks again for your service,