Page 1
s
P1-400 Panelboard Kit
MBKJD1A & MBKJD3A
JD Main Breaker Kit
Installation
Instructions
11-A-1115-01 Rev. 02
-4-
NOTE: For both feed location configurations, the breaker handle must point upward when in the “ON” position.
BREAKER
SUPPORT
UP
SUPPORT
BARRIER
ORIENTATION
TOP FEED CONFIGURATION
BOTTOM FEED CONFIGURATION
SUPPORT
BARRIER
ORIENTATION
BREAKER
SUPPORT
Figure 2: Top & Bottom Feed Kit Configurations
NOTE: For both feed location configurations, the filler is oriented as shown, with the “MAIN” label
positioned above the breaker handle.
Figure 3: Top & Bottom Feed Deadfront Filler Installation
TOP FEED
BOTTOM FEED
UP
(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
Also for JD
breaker kits
with breaker
INCLUDED.
Part numbers:
MBKJD1***A
MBKJD3***A
MBKJD12***A
MBKJD32***A
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.
SUPPORT
BARRIER
ORIENTATION
BREAKER
SUPPORT
(ALREADY
MOUNTED
TO INTERIOR)
(MUST BE
SECURED
TO BOTH
BREAKER
AND RAILS)
Figure 2A: Bottom Feed
for Pre-Installed Breaker
Kit Configuration
BREAKER
SUPPORT
(ALREADY
MOUNTED
TO BREAKER)
(NO NEED
TO SECURE
OR REMOVE)
Page 2
Installation Instructions
The following instructions are for the installation of a Siemens JD main breaker kit in a 400 amp Revised P1 Panelboard. The parts provided in this kit are for connection to a 1-phase 2 or 3-wire system or to a 3-phase 3 or 4-wire
system. For all 1-phase systems, disregard the B-phase connector instructions. The breaker is NOT included with
this kit and must be purchased separately. Be sure to choose the appropriate breaker for the voltage, system &
feed location in use. For systems with no neutrals, disregard the neutral connection.
NOTE: Other main breaker kits may include this kit AND a breaker with main breaker support(s) attached.
White text on black background on these pages denote instructions specific to these particular kits (see
list on front cover). (For clarification, DANGER warning below applies to all.)
11-A-1115-01 Rev. 02
-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.
11.
Attach the main cables to the breaker and neutral
terminal and torque connections
to values specified
on the device. If no values are listed on the device,
refer to the Hardware Tightening Torque label
affixed to the rear of the deadfront.
8. On 1-phase 3-wire and 3-phase 4-wire systems,
neutral lugs are required. For the 600 kcmil neutral
lug (item 11), insert the 1/4”-20 x 1”
carriage bolt
(item 13) through the square hole on the neutral
riser from below, then place the 600 kcmil neutral
lug and the anti-turn plate (item 12) as shown.
Finish with the 1/4”-20 belleville washer nut (item 14).
14. Before energizing the panel, ensure that all con nections have been properly torqued, that all
circuit breaker terminal covers are secured, that the
deadfront is installed and that all fillers are in place.
BREAKER SUPPORT BARRIER
1
PHASE CONNECTOR
BREAKER ESCUTCHEON
MAIN LABEL
3/8” NARROW WASHER
HELICAL SPRING LOCKWASHER
DEADFRONT
DEADFRONT
SUPPORT
BASE
RAIL
NEUTRAL
CROSS BUS
** (2) FOR 1Ø, (3) FOR 3Ø
NEUTRAL
CROSS BUS
**
**
**
1
1
MAIN
END
FEED-THRU
OR SUBFEED
END
1
2
3
4
5
6
7
3/8”-16 x 1” HEX HEAD BOLT
5/16”-18 x 3/4” HEX HEAD SEMS* ASSEMBLY SCREW
***
2
**
8
9
1/4”-20 x 2-3/4” PHILLIPS ROUND HEAD THREAD-FORMING SCREW
5. Position one of the outer breaker connectors
(item 2) so that the single-hole end rests on the
breaker pad and the double-hole end rests on
the panel section or main bus. Note that the
outer connectors are mirror images and are NOT
interchangeable. Attach the connector to the
breaker pad using 3/8”-16 bolt (item 7), a helical
spring lockwasher (item 6) and a plain washer
(item 5) as shown. Do not tighten at this time.
Repeat the process to attach the other outer
connector to the breaker.
6.
3-Phase panels require a B-phase connection.
Position the B-phase connector so that the single hole end rests on the breaker pad and the double hole end rests on the panel section or main bus.
Attach the connector to the breaker pad using
the same hardware as the A and C-phases.
Do NOT tighten at this time.
10.
Torque all connections to the values specified on
the Hardware Tightening Torque label affixed to the
rear of the deadfront (or reference assembly instructions
where appropriate).
* SEMS ASSEMBLY SCREWS HAVE A CAPTIVE WASHER ON THE SCREW
THIS KIT CONTAINS THE FOLLOWING ITEMS:
ITEM
QTY
DESCRIPTION
4
9
MAIN
OPENING
3
2
BREAKER
SUPPORT
BRACKET
350 kcmil NEUTRAL LUG ASSEMBLY
600 kcmil NEUTRAL LUG
1
1
10
11
12
ANTI-TURN PLATE
1/4”-20 x 1” CARRIAGE BOLT
1
2
1
13
14
1/4”-20 BELLEVILLE WASHER NUT
*** (4) FOR 1Ø, (6) FOR 3Ø
1
5
6
7
8
11
10
14
12
13
4. Refer to Figure 2 on page 4 to determine the
correct breaker mounting for the panel’s feed
location. Also refer to main breaker instructions
for access to mounting holes; breaker covers
may need to be removed for access. Follow
instructions on the Wire Grip Kit Installation
Instructions to install breaker lugs (lug kit
TA2J6500; purchased separately) on the
correct end of the breaker before continuing.
TOP FEED: Install lugs at the ON end of the breaker.
The breaker support bracket is pre-installed on
the breaker ON end. Attach this bracket to the
base rails using the hardware removed in step 3.
Skip to step 5.
BOTTOM FEED: Install lugs at the OFF end of
the breaker.
Leave the pre-installed breaker support bracket
attached to the breaker but note it does not need
to be secured to the base rails. Instead, attach
the breaker to the
existing mounted support
bracket (as shown in Fig. 2A on pg. 4) by
following these directions:
Insert both 1/4”-20 x 2-3/4” screws (item 9) through
the appropriate end of the breaker case and through
the outer holes on the support barrier (item 1)
as shown in Figure 1, to retain the barrier during
installation. Fasten the breaker to the support.
Figure 1
7.
Fasten all breaker connectors to the panel section
or main bus using two 5/16”-18 SEMS screws
(item 8) per joint.
12.
Remove the main lug blank filler from the deadfront
main opening (if present). Refer again to Figure 3
on page 4 to determine the correct orientation of the
deadfront main breaker escutcheon (item 3) for the
panel’s feed location. Insert the breaker escutcheon
into the front of the deadfront.
13. For main breaker applications, apply the “MAIN”
label (item 4) to the breaker escutcheon as shown.
For installation as a Main Breaker:
1. Lock off all power supplying this equipment
before working on it.
3. To install this kit for main breaker use, remove
the main lugs (if installed).
TOP FEED: Also remove the main breaker
support already installed onto rails. (Save
hardware for mounting of pre-installed support.)
2. Remove the deadfront.
9. Position the 350 kcmil neutral lug assembly
(item 10)
under the neutral riser, allowing the stud to pene trate as shown. Fasten it to the riser with a 1/4”-20
belleville washer nut (item 14).
NOTE: If the panelboard is fed by two 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 appli cations). If the panelboard uses a 600 kcmil cable
for neutral and is being used as service equipment,
the 350 kcmil lug is used for the grounding electrode
conductor.
N/A
N/A
N/A
72 lb-in
TORQUE
N/A
N/A
N/A
72 lb-in
N/A
N/A
N/A
N/A
****
240 lb-in
**** TORQUE (lb-in): 72 for 1/8” CU; 108 for 3/16” or 1/4” AL; 144 for 3/16” CU
Bottom-feed mains are reverse fed,
and require Type JXD breakers.
Top-feed mains may be either
Type JD or JXD:
Top-feed Main Breakers:
JD, HJD, JXD, HJXD
Bottom-feed Main Breakers:
JXD, HJXD
The P1-400 Panel provides wiring
space for the following cable options:
For (2) 250 MCM line cables per
phase use breaker line lug TA2J6500
or copper lug TC2J6500
For (1) 600 MCM line cables per
phase use breaker line lug TA1L6750
or copper lug TC1J6600
NOTE: Kits that include a breaker will have the following
items pre-assembled to the breaker and are not included
in the itemized list on this page:
(1) Type JD circuit breaker
(1) breaker support barrier (see item 1)
(2) 1/4”-20 round head screws (see item 9)
(1) breaker support bracket
(All items in the itemized list below are included in this kit
for use as needed for installation per these instructions.)
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