Generator Ready Load Center
NEMA 3R
Features
J UL Listed
J NEMA 3R for outdoor use
J Split interior design allows for standby back up power
to user defined critical circuits
- Lower, standby protected section has 18 one inch
spaces for 30 circuits
- Upper, utility only section has 10 one inch spaces
for 10 circuits
- An additional 2 spaces and 2 circuits are reserved
for generator installation
J Designed to accept the Siemens Automatic Transfer
Switch (Catalog No. GENTFRSWTCH)
J Designed for use with Siemens, Generac, Centurion,
and Guardian standby generators
J Main Lug load center convertible to main breaker.
Acceptable main breakers:
- Murray: MBK225M, MBK200M, MBK150M, all
Type MP circuit breakers backfed on upper section
only
J Main breaker load center also convertible to main lug
with use of lug kit part no. ECMLK225
J Neutral and ground bars have multiple 1/0 conductor
terminals
J Lifetime warranty on Murray installed circuit breakers
J Factory installed ground bars on all devices
J Invertible for bottom feed applications
J The neutrals and grounds in the generator ready
load center are NEC and UL approved to accept multiple
ground terminations in one terminalbc
J Accepts standard Murray load center accessories
aExcluding AFCI, GFCI and Surge breakers
bNEC is a registered trademark of the National Fire Protection Agency.
cSee the wiring diagram on the panel door for the latest product
information.
Catalog no.
One inch
spaces*
Max
circuits*
Max.
Amp rating
Dimensions (inches)
Length
Width
Depth
LW3042B1200GEN
30
42
200A
42.00
14.63
4.00
LW3042L1225GEN
30
42
225A
42.00
14.63
4.00
*2 Spaces and 2 circuits are reserved for standby generator installation.
Data Sheet
www.murrayconnect.com
Murray Generator Ready Load Center.qxd
10/22/2007
10:41 AM
Page 2
Knockout diagrams and lug data
Knockout Diagrams and Lug Data
Torque Table
� Use copper or aluminum 60/75oC wire.
� See circuit breaker markings for wire size and
torque requirements.
4 1/4” K.O.s
2 K.O.’s For
3/8”, 1/2”, 3/4”, 1”, 1-1/4”
Conduit
10 K.O.’s For
1/2”, 3/4”, 1”
Conduit
10 K.O.’s For
1”,1-1/4”,2”,2-1/2”
Conduit
12 K.O.’s For
3/8”, 1/2”, 3/4”
Conduit
52 K.O.’s For
1/2” Conduit
INDOOR / 12-42 Circuit
4 K.O.’s For
1”,1-1/2”,2”,2-1/2”
Conduit
12 K.O.’s For
1/2”Conduit
8 K.O.’s For
1/2”,3/4”
Conduit
4 K.O.’s For
1”, 1-1/2” Conduit
For 100A, 125A Main Breaker
and Main Lug Enclosures
Terminals
Wire
Torque
2/0-4 AWG
110 lb.-ins.
A, B
Neutral and Equipment Ground Bars
Small Terminals 10-14 AWG
20 lb.-ins.
8 AWG
25 lb.-ins.
6 AWG
35 lb.-ins.
Large Terminals 10-14 AWG
35 lb.-ins.
8 AWG
40 lb.-ins.
1/0-6 AWG
45 lb.-ins.
LX081M
2/0 - 6 AWG
50 lb.-ins.
Neutral Lug Kit
Main Lug/Main Breaker to
45 lb.-ins.
Bus Connection (1/4-20 Nut)
For 150A, 200A, 225A Main Breaker
and Main Lug Enclosures
Terminals
Wire
Torque
A, B
300 kcmil - 4 AWG 275 lb.-ins.
N
300 kcmil - 4 AWG 250 lb.-ins.
G
2/0-6 AWG
90 lb.-ins.
Neutral and Equipment Ground Bars
Small Terminals 10-14 AWG
20 lb.-ins.
8 AWG
25 lb.-ins.
6 AWG
35 lb.-ins.
Large Terminals 10-14 AWG
35 lb.-ins.
8 AWG
40 lb.-ins.
1/0-6 AWG
45 lb.-ins.
LX081M
2/0 - 6 AWG
50 lb.-ins.
Neutral Lug Kit
Main Lug/Main Breaker to
45 lb.-ins.
Bus Connection (1/4-20 Nut)
Equipment Ground Bar
Terminals are suitable for the following wire
combinations.
Small Terminals:
(1) 14-6 AWG Cu; (1) 12-6 AWG Al;
(2) 14 AWG Cu; (2) 12 AWG Cu;
(2) 12 AWG Al solid wires.
Large Terminals:
(1) 14-2 AWG Cu; (1) 12-2 AWG Al;
(2) or (3) 14 AWG Cu;
(2) or (3) 12 AWG Cu or Al;
(2) 10 AWG Cu; (2) or (3) AWG Al;
(3) 10 AWG Cu solid when torqued to 50 lb.-in;
(3) 10 AWG Cu stranded.
OUTDOOR / 12-42 Circuit
Murray Electrical Products
Siemens Energy & Automation, Inc.
3333 Old Milton Parkway
Alpharetta, GA 30005
�2004 Siemens Energy & Automation, Inc. All Rights Reserved.
Siemens is a registered trademark of Siemens AG. Murray is a
registered trademark of Siemens Energy & Automation, Inc.
Product names mentioned may be trademarks or registered
trademarks of their respective companies. Specifications are
subject to change without notice.
Drawing layouts
Murray Electrical Products
Siemens Energy & Automation, Inc.
Industry Sector
3333 Old Milton Parkway
Alpharetta, GA 30005
1-800-964-4114
info.sea@siemens.com
©2009 Siemens Energy & Automation, Inc.
All Rights Reserved. Siemens is a registered
trademark of Siemens AG. Product names
mentioned may be trademarks or registered
trademarks of their respective companies.
Specifications are subject to change without
notice.
MYFL-NEMA1-0609
www.murrayconnect.com