Application Guide

Section 5876 Installation Instructions
Issue AT, April 26, 2013 Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B)
Page 4-34 Chapter 4. Making Electrical Connections
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Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
LOAD CONNECTIONS
Note: Refer to System Application Guide SAG582140000 for recommended wire sizes
and crimp lugs. Refer also to the SAG for maximum size of wire to connect to the
various lug landing points. Refer to drawing 031110100 for lug crimping
information. Refer to drawings 031110200 and 031110300 for additional lug
information. The SAG and Engineering Drawings can be accessed via the CD
(Electronic Documentation Package) furnished with your system. A copy of
drawing 031110100 is also located at the end of this manual for your
convenience.
Power/Distribution Bay
Each Power/Distribution Bay has two (2) distribution buses. Each distribution bus has
twenty-four (24) fuse/circuit breaker device mounting positions. Note that the various
fuse/circuit breaker devices require different number of mounting positions. The load
side of each fuse/circuit breaker mounting position is bused up to the top of the bay.
Each fuse/circuit breaker device is supplied with a load lug adapter plate that mounts to
the appropriate load side busbar at the top of the bay (except bullet nose-type devices
which use the existing busbar provided at the top of the bay and do not require a lug
adapter plate). Load return leads are terminated outside the bay. An optional external
ground busbar mounted on top of the bay is available.
Refer to Figure 4-10 for load lug landing locations.
When lugs are secured using 1/4 inch hardware, recommended torque is 60 in-lbs when
a Belleville lock washer is used, and 84 in-lbs when a standard flat washer and lock
washer are used.
When lugs are secured using 3/8 inch hardware, recommended torque is 180 in-lbs when
a Belleville lock washer is used, and 300 in-lbs when a standard flat washer and lock
washer are used.
Load Side
Connect load leads to the respective load busbar located at the top of the bay. These
busbars are provided with 1/4-20 studs and hardware on 5/8 inch centers for installation
of customer provided two hole lugs. Note that for distribution devices that require more
than one distribution mounting positions, lug adapter kits are furnished. The kit supplied
lug adapters are provided with 3/8 clearance holes on 1 inch centers for installation of
customer provided two hole lugs. The kits also contains 1/4" and 3/8" mounting
hardware.
Load Return Side
To Optional External Top-Mount Ground (Load Return) Busbar Assembly and
Optional Load Return Lug Extension Busbar Assembly: Connect load return leads to
the external ground busbars mounted on top of the bays. These busbars are provided
with 3/8 inch clearance holes on 1 inch centers for installation of customer provided two
hole lugs. Customer must supply lug mounting bolts and hardware (note that the Load
Return Lug Extension Busbar is provided with lug mounting hardware).
To Optional Internal Ground (Load Return) Busbar Assembly: Connect load return
leads to the internal ground busbars mounted inside the bays. These busbars are
provided with clearance holes for installation of customer provided two hole lugs.
Customer must supply lug mounting bolts and hardware. Refer to Figure 4-11
.