Vertiv | NetSure 7100 Series -48V DC Power System Installation Manual (IM582127000) | Rev. BB
Relay Rack or Enclosure Grounding Connection (Frame Ground)
System components are factory mounted in a relay rack, on shipping rails, or in an enclosure as specified when
ordered.
For relay rack and enclosure grounding requirements, refer to the current edition of the American National
Standards Institute (ANSI) approved National Fire Protection Association's (NFPA) National Electrical Code
(NEC), applicable local codes, and your specific site requirements.
A customer's grounding network lead can be attached to the top of the relay rack or enclosure. Provision is
made for installing a lead with a two-hole lug that has 1/4" bolt clearance holes on 5/8" centers. When using 1/4-
inch hardware, recommended torque is 84 in-lbs when a standard flat washer and lock washer are used. Refer
to Figure 37 for locations.
NOTE!
REMOVE TAPE (IF PRESENT) FROM HOLE LOCATIONS BEFORE INSTALLING LUG.
NOTE!
The DC return connection to this system can remain isolated from system frame and chassis
(DC-I).
NOTE!
This system is suitable for installation as part of the Common Bonding Network (CBN).
Central Office Ground Connection
Landing points are provided on the battery return bus for a central office ground lead (see Figure 104, Figure
105, and Figure 108). For central office grounding requirements, refer to the current edition of the American
National Standards Institute (ANSI) approved National Fire Protection Association's (NFPA) National Electrical
Code (NEC), applicable local codes, and your specific site requirements.
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