BC sizing for TMGB in Data Center

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BC sizing for TMGB in Data Center

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attaingroup

Posted Friday, March 05, 2010 4:03 PM

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Group: Forum Members
Last Login: Monday, March 08, 2010 1:32 PM
Posts: 4, Visits: 8

I have a client that has a desgin which I am questioning on his behalf. It specs a 750 MCM BC from the TMGB to the main building electrical ground (approx 500 ft away).

I say standards show max is 3/0. His design seems more based on a 48V DC grounding system.

Also he specs all racks and cabinets to be discreetly grounded back to TMGB. I believe you can bond to a common ground cable in tray (not serially). Trying to save client major dollars as their budgets are very tight and I believe this is totally unecessary. Could you some help backing up my case.

Anyone?

Post #4562

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