Installation Instructions
The following instructions are for the installation of Siemens main / feed-thru lug kit in a Revised P1, 400 amp,
Panelboard. The parts provided in this kit are for connection to a 1-phase 2 or 3-wire system OR a 3-phase 3
or 4-wire systems. For systems with no neutrals, disregard the neutral instructions.
11-A-1108-01 Rev. 01
-3--2-
DANGER
Hazardous voltage.
Will cause death or
serious injury.
Keep out.
Qualified personnel only.
Disconnect and lock off all
power before working on
this equipment.
5. Position the main lugs (item 3) as shown.
Fasten each lug to the panel section or main
bus using two 5/16”-18 x 1” SEMS thread-
forming screws (item 2) per lug.
MAIN LABEL 1
5/16”-18 x 1” SEMS* THREAD-FORMING SCREW
DOUBLE LUG
BLANK FILLER
350 kcmil LUG ASSEMBLY
**
***
1
1
THIS KIT CONTAINS THE FOLLOWING ITEMS:
ITEM DESCRIPTION QTY
1
2
3
4
5
BASE
RAIL
DEADFRONT
MAIN
END
NEUTRAL
RISER
NEUTRAL
CROSS BUS
1/4”-20 BELLEVILLE WASHER NUT 2
6
ANTI-TURN PLATE 1
7
600 kcmil LUG 1
8
7.
Position the 350 kcmil
neutral lug assembly
(item 5) under the neutral riser, allowing the
stud to penetrate as shown. Fasten it to the
riser with a 1/4”-20 belleville washer nut (item 6).
NOTE: If the panelboard is fed by (2) 250 kcmil
or smaller cables, this lug assembly is used for
the second incoming cable and one of the 1/0
terminations on the neutral strip is used for a
grounding electrode conductor (if required for
service equipment applications). If the panel-
board uses a 600 kcmil cable for the neutral and
is being used as service equipment, the 350 kcmil
lug is used for the grounding electrode conductor.
1/4”-20 x 1” CARRIAGE BOLT 1
9
DEADFRONT
SUPPORT
MAIN LUGS
3-PHASE SYSTEM SHOWN
2
3
3-PHASE 4-WIRE SYSTEM SHOWN
350 kcmil
NEUTRAL LUG 600 kcmil
NEUTRAL LUG
SNAP B-PHASE
BARRIER IN
PLACE BEFORE
THE LUG IS
INSTALLED
ON BUS
1
4
10
INTERPHASE BARRIER ****
10
** (4) FOR 1-PHASE; (6) FOR 3-PHASE
*** (2) FOR 1-PHASE; (3) FOR 3-PHASE
**** (0) FOR 1-PHASE; (1) FOR 3-PHASE
For installation as main lugs:
For installation as feed-thru lugs*:
* For panels with feed-thru or subfeed space ONLY
1. Lock off all power supplying this equipment
before working on it.
9.
Attach the cables to the lugs and torque
connections
to values specified on the Hardware
Tightening Torque label affixed to the rear of the
deadfront.
10. Remove any breaker fillers (if installed) and fill the
opening with the blank filler (item 4) provided with
this kit.
11. A label is provided (item 1) to mark the ampacity
of the panel’s main lugs. Apply the label to the
center of the installed blank filler (item 4).
12. Before energizing the panel, ensure that all con-
nections have been properly torqued, that the
deadfront is installed and that all fillers are in place.
13. Follow steps 1 through 11 except that any existing
subfeed or feed-thru lug assemblies are to be
removed. In addition, do not install the “MAIN”
label. Finish with Step 12.
3. To install this kit for main lug use, remove the
main (if installed).
2. Remove the deadfront.
8. Torque all connections to the values specified
on
the Hardware Tightening Torque label
affixed to the rear of the deadfront.
6. On 1-phase 3-wire or 3-phase 4-wire systems,
neutral lugs are required.
For the 600 kcmil lug,
push the carriage bolt (item 9) through the
square hole on the underside of the neutral riser,
then place the 600 kcmil lug (item 8) and the
anti-turn plate (item 7) as shown. Finish with the
1/4”-20 belleville washer nut (item 6).
* SEMS ASSEMBLY SCREWS HAVE A CAPTIVE WASHER ON THE SCREW
4. For 3-phase applications, snap the interphase
barrier (item 10) in place on B-phase by
inserting the tabs on the barrier into the slots
on the bus support.
MAIN LUGS
NOT SHOWN
7
8
6
9
5
6
