Grounding of copper busbars in network cabinets

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The busbar or vertical grounding strip should be used to provide a visually verifiable, all-copper grounding path. When equipment does not provide a lug-mounting pad, the next best option is to bond the equipment mounting flanges directly to the rack rails. Mounting bare copper grounding busbars to steel or aluminum frames invites galvanic corrosion, especially in humid or thermally dynamic environments. Over time, oxidation and electrochemical reactions degrade conductivity and increase resistance. A grounding busbar is a conductive copper bar used to connect multiple grounding wires from different devices to a single grounding point. Color-coded product mounting dimensions throughout this guide allow for visual matching of lugs and grounding kits to the mounting locations on busbars.

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