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NetSure™ ITM with eSure™ Technology
Installation Manual, Section 6040 (Issue AB, April 8, 2013)
Spec. No: 582145500
23
Section 6040
Model: NetSure™ ITM Issue AB, April 8, 2013
4.4 Making Electrical Connections
Before making electrical connections, do the following for each DC UPS module (see Figure 10 and
Figure 11 for circuit breaker and fuse locations).
• Open the front door. For bottom cable installations, remove the lower front panel. For all
installations, remove protective panels as required (see 4.2 - Protective Covers).
• Ensure the main AC input circuit breaker(s) is in the OFF position.
• Ensure all PCU AC input circuit breakers are in the OFF position.
• Ensure the three (3) battery disconnect fuses are removed.
• Ensure all distribution circuit breakers are in the OFF position or distribution fuses are removed.
4.4.1 Cabinet Grounding Connection
The cabinet grounding connection is made to a stud located on the top of the DC UPS module, as
shown in Figure 12. A cabinet grounding cable must be connected to this stud, per site requirements.
Tighten the connection to the torque indicated in Figure 12.
Each module also contains a separate stud located on each side to connect the supplied grounding
strap between DC UPS modules, if desired.
All modules and cable conduit should be grounded in accordance with the NEC and all applicable
local codes.
Figure 12 Cabinet Grounding Connection
4.4.2 DC Distribution Ground/Return Busbar Grounding Connection
The DC distribution ground/return busbar must be connected via a solidly grounded lead to the main
building ground. Three extra positions are provided on the ground/return busbar for customer
connection to site ground. Refer to Figure 10 and Figure 11 for location of the DC distribution
ground/return busbar. Refer to Table 250-122 in the American National Standards Institute (ANSI)
approved National Fire Protection Association's (NFPA) National Electrical Code (NEC) for
grounding conductor size. Typically use equivalent or minimum of 1/0 AWG.
!
CAUTION
The electrical connections described in this section must be performed by authorized
electricians or qualified technical personnel. Follow the NEC and applicable local codes. If you
have any difficulties, contact your local Emerson representative or Emerson Services.
!
WARNING
Failure to follow proper grounding procedures can result in electric shock hazard to personnel
or the risk of fire, should a ground fault occur.
NOTE
Proper grounding significantly reduces electromagnetic interference problems in systems.
Module Cabinet
Grounding Stud
Studs for Connecting
Grounding Strap
between Modules
3/8” (M10) Stud.
Recommended Torque is
407-434 in-lbs (46-49 Nm).
5/16” (M8) Studs.
Recommended Torque is
204-221 in-lbs (23-25 Nm).
Module Top View
Customer supplied
conduit fittings