Site Preparation
20
7750 SR ESA 100G Chassis Installation Guide
Release 20.5
3HE 16094 AAAA TQZZA Issue: 01
3.2 Site Selection
The 7750 SR ESA 100G should be mounted in a standard 19-inch equipment rack.
The site should be a weather-protected and temperature-controlled location, and
should include the following criteria:
• maintain the site temperature within 41°F to 104°F (5°C to 40°C) and its humidity
within 5 to 85%, non-condensing, for the 7750 SR ESA 100G
• provide adequate space on the front, rear, and two sides of the chassis to enable
servicing and proper airflow
• ensure a secure environment in which only authorized and trained service
personnel are allowed to service the unit (IEC 60950 safety requirement)
Warning:
• The chassis is suitable for installation as part of the Common Bonding Network (CBN)
or an Isolated Bonding Network (IBN).
• The chassis is suitable for installation in Network Telecommunication Facilities or
locations where the NEC applies.
• All bare conductors must be coated with an appropriate antioxidant compound before
connections are made. All unplated connectors, braided strap, and bus bars must be
brought to a bright finish and then coated with an antioxidant before connecting them.
• When making the primary ground connection, a star washer must be used for
antirotation.
• When connecting the device to the rack frame, use thread-forming screws and paint-
piercing washers. The ground lug is secured to the frame and EUT by screws tightened
to a torque of 58 to 68 lbf-in (6.55 to 7.68 N·m).
• The equipment under test (EUT) is specified for DC-I power configurations. The battery
returns must remain isolated until they reach the main power bus.
• The 7750 SR ESA 100G with DC power supply should be installed only in restricted
access areas (such as dedicated equipment rooms and electrical closets) in
accordance with Articles 110-26 and 110-27 of the most recent National Electrical
Code ANSI/NFPA 70.
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