Specification

23
Load Center Selection & Application Guide |
s
To activate standby power the utility main
breaker must be in the “OFF” position to
prevent dangerous feedback between the
power sources.
Panels in which the bussing or wire
forms from the meter socket land on
main lugs are not acceptable for use in
standby systems because turning the
main breaker to “OFF” does not prevent
feedback to the utility power lines.
Examples of such panels include catalog
numbers that start with the
following letters.
MC0606L1200*
MM0406L1*
MC1212L1200*
Standard features
n
UL listed for use in most
Siemens load centers and meter
combinations
n Suitable for use with optional
standby systems in accordance
with article 702 of the National
Electric Code
n Corrosion resistant finish
n Easy assembly requiring no
modifications to the load center
or meter combination
n Remains attached to the main
breakers when load center cover
Wire forms
or bussing
Acceptable usage of Interlock Kits by load center/meter combination catalog numbers
Siemens Meter Combinations
MC0816B1150RTH 5 7 MC2040B1200 5 7
MC0816B1150T 5 7 MC2040B1200R 5 7
MC0816B1150TH 5 7 MC2442B1200FEC 2
MC0816B1200FCTM 2 MC2442B1200SEC 2
MC0816B1200RT 5 7 MC3040B1200SECW 5 7
MC0816B1200RTB 5 7 MC3042B1200FED 3
MC0816B1200RTH 5 7 MC3042B1200SED 3
MC0816B1200SCTM 2 MC3042B1225FED 3
MC0816B1200T 7 MC3042B1225SED 3
MC0816B1200TH 5 7 MC4040B1200SECW 5 7
MC0816B1350RLTM 5 7 MC0816B1200RJBT 8
MC0816B1400RLTM 5 7 MC0816B1150RJBT 8
MC1224B1100FEC 2 MC0816B1200RCT 8
MC1224B1100SEC 2 MC0816B1150RCT 8
MC1224B1125 1 2 MC0816B1200CT 8
MC1224B1125FEC 2 MC0816B1150CT 8
MC1224B1125SEC 2 MC2040B1150RCT 9
MC1632B1100SEC 2 MC2040B1150CT 9
MC1632B1125FEC 2 MC2040B1200RCT 9
MC2040B1150 5 7 MC2040B1200CT 9
Numbers 1 through 9 in these tables represent
the last digit in each interlock kit catalog number.
Example: 1 = ECSBPK01
When used in horizontal positions as typical in
most load centers, ECSBPK07 is recommended for
use only with QNR type circuit breakers.
Standby power interlock kits are not intended for use
with AFCI, GFCI, 3-pole or 1/2” frame circuit breakers
and 4 space, 125 amp load centers.
Siemens type EQ load centers using a “4-pole” main
breaker do not have a kit available to interlock this
main to branch circuits. Branch circuit positions can
be interlocked.
Utility main breaker
Standby power
main breaker
Load Centers
Manual Transfer Interlock Kits for Load Centers and Meter Combinations
Convert load centers or meter combinations into standby power panels
ES Series Load Centers
can utilize interlock kits:
1, 2, 5, 6, 7. Kits 3 and 4
can also be used on main
breaker panels.
PL Series Load Centers
can utilize interlock kits:
1, 2, 3, 4, 5, 6, 7.