Nebs Compliance; Important Information - Dell Networking S4048 Installation Manual

For your system to be network equipment building system (NEBS) compliant, you must follow the instructions detailed in this section.
To be NEBS compliant, orient your system in the rack so that the air inlet is from the front aisle and the air exhaust is to the back aisle.

Important information

WARNING: The SFP+, QSFP, QSFP28, console, Ethernet management, and universal serial bus (USB) ports are suitable for
connection to intrabuilding or unexposed wiring or cabling only. You MUST NOT metallically connect the ports to interfaces that
connect to the out side plant (OSP) or its wiring. Use these interfaces as intrabuilding interfaces only (Type-2 or Type-4 ports as
described in GR-1089-CORE, Issue 6) and they require isolation from the exposed OSP cabling. Adding primary protectors is not
sufficient protection to connect these interfaces metallically to OSP wiring.
WARNING: If you install and connect the S4048-ON system to a commercial AC power source, you must connect the system to
an external special protection device (SPD).
To be NEBs compliant:
• Locate your system in a restricted-access area were only trained personnel are allowed access.
• Install and connect your system to the common bonding network (CBN).
• You can also install and connect your system to the central office.
• Connect the battery returns of your system as DC-I.
• Ground your system using a copper ground conductor.
• Clean and coat all bare grounding connection points on your system with an antioxidant solution before making connections.
• Bring all unplated surfaces on your system to a bright finish and treat them with an antioxidant solution before making connections.
• To ensure electrical continuity, remove any nonconductive surfaces on your system from the threads and connection points.
• Use the two-hole, Listed, compression-type lug with an AWG 14 gauge wire for system grounding.
NOTE: The S4048–ON can operate at -40.5 VDC to -60 VDC at a maximum current level of 15A.
NOTE: The S4048-ON is Earthquake Z4-compliant when you attach the ReadyRails to the four-post frame using threaded
hardware. Do not use the tool-less or two-post installation methods.

NEBS compliance

NEBS compliance
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