Siemens 4MLKA1A User manual

s
P1-400 Panelboard Kit
4MLKA1A, 4MLKA3A
Main / Feed-thru Lugs
Installation
Instructions
11-A-1108-01 Rev. 01
-4-
(for use in Revised P1 Panelboards ONLY)
To confirm, note the part number of the panel (marked on the interior label).
If it ends in an “N” or a “T” it is a “Revised P1” and is compatible with this kit.
(For example: P1E42MC250A is an Original P1; P1E42MC250AT is a Revised P1)
1
1
These instructions do not purport to cover all details or variations in equipment, or to provide for every possible
contingency to be met in connection with installation, operation or maintenance. Should further information be
desired or should particular problems arise, which are not covered sufficiently for the purchaser’s purposes, the
matter should be referred to the local Siemens sales office. The contents of this Instruction manual shall not
become part of or modify any prior or existing agreement, commitment or relationship. The sales contract
contains the entire obligation of Siemens. The warranty contained in the contract between the parties is the sole
warranty of Siemens. Any statements contained herein do not create new warranties or modify the existing
warranty.
Trademarks - Unless otherwise noted, all names identified by ® are registered trademarks of Siemens AG or
Siemens Industry, Inc. The remaining trademarks in this publication may be trademarks whose use by third
parties for their own purposes could violate the rights of the owner.

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