GE Industrial Solutions Spectra Series Power Panelboards Bolt-On Main Lug Kits User Manual
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DEH071 Installation Instructions R02
Spectra Series™ Power Panelboards
Bolt-On Main Lug Kits
Application
These instructions apply to main lug kits with the
following catalog numbers. An “F” suffix indicates that the
kit includes all cover plates.
AMB2120N(F) AMB3120N(F) AMB2120DN(F)
AMB3120DN(F) AMB2250CA(F) AMB3250CA(F)
AMB2600CA(F) AMB3600CA(F) AMB2800CA(F)
AMB3800CA(F) AMB2120CA(F) AMB3120CA(F)
AMB2250DCA(F) AMB3250DCA(F) AMB2600DCA(F)
AMB3600DCA(F) AMB2800DCA(F) AMB3800DCA(F)
AMB2120DCA(F) AMB3120DCA(F)
Installation
WARNING: Danger of electrical shock or injury.
OFF
Turn
switchboard before workin
e
Equipment is to be installed and maintained b
properly trained and qualified personnel only.
1. Orient the lug base with the lug wire holes facing the
end of the box stamped
the interior, as illustrated in Figure 1.
ower ahead of the panelboard or
inside the
ment or removing any component.
LINE or toward the line side of
Line Side
2. Locate the mounting position. For Spectra APNB bolton style interiors, locate the side of the panelboard
interior in which the dimension from the nearest bus
face to the inner face of the bus support rail is 2.75
inches, as shown in Figure 2. The lug straps will be
mounted on this side of each phase of the bus.
Nut, Flat
Washer,
Conical
Washer
Figure 2. Lug strap positions relative to the bus bars of a Spectra
For Spectra APN plug-in style interiors, the lug straps
are positioned between the buses for each phase, as
shown in Figure 3. For Spectra APN interiors rated at
600 A or less, the lug tangs are positioned as described
above for Spectra APNB interiors.
Nut, Flat
Washer,
Conical
Washer
Lug
Strap
Lug
Strap
Bus
Carriage
Bolt
APNB bolt-on interior.
Bus
Carriage
Bolt
Figure 3. Lug strap positions relative to the bus bars of a Spectra
APN plug-in interior.
Figure 1. Lug assembly orientation.
3. Align the mounting holes. Align the lug strap
mounting holes with the first and third bus holes from
the box end stamped
LINE on the rear row of holes, as
shown in Figure 4.
6. Wire the lugs using the conductor sizes and tightening
torques listed in Table 1. If compression lugs are used,
follow the tool and wire information stamped on the
lugs.
Mounting Holes
Figure 4. Bus bar mounting holes.
4. Fasten the lug straps to the bus using a carriage bolt,
flat washer, Belleville washer, and nut, as shown in
Figures 2 and 3. Tighten these bolted connections to
200–250 in.-lb.
5. Install the wire barriers. Position the wire barriers so
that the second and fourth holes from the top of the
wire barrier align with the first and fourth holes of the
panel side rails or Z rails, as shown in Figure 5. Secure
the wire barriers to the panel side rails or Z rails using
the thread-forming screws supplied.
Wire
Barrier
Panel Side
Rail
Torque,
Lug Part No.
252B3638G9–10 375
252B3638G1–2 450 2/0–600 kcmil (4)
252B3638G3–8 450 2/0–600 kcmil (8)
GEA2-750 475 3/0–750 kcmil (2)
in.-lb.
Wire Size
(# of wires)
8–500 kcmil (1)
#2/0–600 kcmil (1)
Table 1. Recommended tightening torque and wire sizes.
7. Install the cover. Lug kits whose catalog numbers have
an F suffix include cover plates. Two covers are
included: one for 36"- and 40"-wide boxes and one for
44"-wide boxes. Choose the appropriate cover for the
box to be used.
Attach the cover to the barriers in four places with the
screws and nut fasteners provided, as shown in Figures
6 and 7. Also use the black spacers for the style of
cover shown in Figure 7. Tighten the screws to 25–30
in.-lb.
Thread-
Forming
Screws
Figure 5. Wire barrier installation.
Barrier
Cover
Screw
Nut
Fastener
Figure 6. Installing the cover.
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