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CHAPTER 4: NEBS COMPLIANCE
For your switch to be network equipment building system (NEBS) compliant, you must follow the instructions detailed in this
section.
To be NEBS compliant, orient your switch in the rack so that the air inlet is from the front aisle and the air exhaust is to the rear
aisle.
4.1 IMPORTANT INFORMATION
WARNING: The form-factor pluggable plus (SFP+), QSFP+, QSFP28, console, Ethernet management, and universal serial bus (USB)
ports are suitable for connection to intrabuilding or unexposed wiring or cabing only. You must NOT metallically connect the ports
to interfaces that connect to the outside 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 EMS100G-32 switch to a commercial AC power source, you must connect the switch to an
external special protection device (SPD).
To be NEBs compliant, you must follow these regulations:
Locate your switch in a restricted access area where only trained personnel are allowed access.
Install and connect your switch to the common bonding network (CBN).
You can also install and connect your switch to the central office.
Connect the battery returns of your switch as DC-I.
Ground your switch using a copper ground connector.
Clean and coat all bare grounding connection points on your switch with antioxidant
Clean and coat all bare grounding connection points on your switch with an antioxidant solution before making connections.
Bring all unplated surfaces on your switch to a bright finish and treat them with an antioxidant solution before making connections.
Remove any nonconductive surfaces on your switch from the threads and connection points to ensure electrical continuity.
Use the two-hole, Listed, compression-type lug with an AWG 14 gauge wire that uses 4-in./lb. to secure your switch to the frame.
NOTE: The switch can operate at -40.5 VDC to -60 VDC at a maximum current level of 15 A.
NOTE: The switch is Earthquake Z4-compliant when you attach the rails to the frame using threaded hardware.
4.2 NEBS-COMPLIANT GROUND INSTALLATION
Before you install the switch into a rack, install the ground (GND) lug assembly.
Your switch includes two installed M3 screws on the lower-left side of your chassis. Your switch also includes an assembled
UL-certified GND lug with bracket, packaged separately. If any parts are missing, contact Black Box Technical Support
at 877-877-2269 or [email protected]
