HP Cisco MDS 9020 Cisco Nexus 5000 Series Hardware Installation Guide (OL-1590 - Page 55

Chapter 2 Installing the Cisco Nexus 5000 Switch Grounding the System Send documentation comments to [email protected] Table 2-3 Proper Grounding Guidelines Environment Electromagnetic Noise Severity Level Grounding Recommendations Commercial building is subjected to direct lightning strikes. High For example, some places in the United States, such as Florida, are subject to more lightning strikes than other areas. All lightning protection devices must be installed in strict accordance with manufacturer recommendations. Conductors carrying lightning current should be spaced away from power and data lines in accordance with applicable recommendations and codes. Best grounding recommendations must be closely followed. Commercial building is located in an area where lightning storms frequently occur but is not subject to direct lightning strikes. High Best grounding recommendations must be closely followed. Commercial building contains a mix of information technology equipment and industrial equipment, such as welding. Medium to high Best grounding recommendations must be closely followed. Existing commercial building is not subject to natural environmental noise or man-made industrial noise. This building contains a standard office environment. This installation has a history of malfunction due to electromagnetic noise. Medium Determine source and cause of noise if possible, and mitigate as closely as possible at the noise source or reduce coupling from the noise source to the affected equipment. Best grounding recommendations must be closely followed. New commercial building is not Low subject to natural environmental noise or man-made industrial noise. This building contains a standard office environment. Electromagnetic noise problems are not anticipated, but installing a grounding system in a new building is often the least expensive route and the best way to plan for the future. Best grounding recommendations should be followed as closely as possible. Existing commercial building is Low not subject to natural environmental noise or man-made industrial noise. This building contains a standard office environment. Electromagnetic noise problems are not anticipated, but installing a grounding system is always recommended. Best grounding recommendations should be followed as much as possible. OL-15902-01 Cisco Nexus 5000 Series Hardware Installation Guide 2-11