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#613290 10/13/17 07:47 PM
Joined: Jun 2004
Posts: 4,552
Moderator-Comdial, ESI, Voicemail, Cisco
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Moderator-Comdial, ESI, Voicemail, Cisco
Joined: Jun 2004
Posts: 4,552
In an IDF at one of our facilities, we have a busbar grounded to the ufer, and all racks, cable runway, and a couple BETs grounded to the busbar. The busbar is a smaller CPI model, however this particular one that we installed previously in the room, prior to a recent expansion, didn't have enough pre-punched holes to accommodate additional equipment. We had another identical unit in stock, so that was installed next to the original. The question, though, is whether it's legal or code-compliant to bond one to the other, and if so, what's the best method, and what conductor size should be used? The conductor from the ufer is #0 or #1, and all other conductors are #6. The other option, if necessary, is to replace both smaller busbars and buy a single, larger busbar with enough space to accommodate all connections. Thanks in advance for the advice.

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Joined: Feb 2006
Posts: 1,716
Joined: Feb 2006
Posts: 1,716
No NEC code violation. Install the new buss bar as the original and use an appropriately sized conductor to bond the two together. If the original is a #0, then use that.


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