1. business and industrial
2. energy
3. electricity

Commercial Metering Switchboards
Meter Sections
General
Type SMM / SMD — For
EUSERC Utility Area
Installations
Type SMM Service Multi-Metering
switchboards are specifically designed
with built-in flexibility for all types of
multi-metering commercial and industrial
applications.
Features
쐍 4000 Amperes Main Service 480
Volt Maximum
쐍 200 Ampere Continuous Duty
Metering Sockets
쐍 With Test Blocks
쐍 Meets EUSERC Requirements
쐍 UL Listed and Labeled
쐍 Hot Sequence Metering Standard
쐍 All Meter Sockets Are Prewired
쐍 Copper or Aluminum Bus
쐍 65,000A Sym Bracing Standard
(Higher Bracing Available if
Required)
쐍 Type 3R Construction Available
쐍 Available With Corner Sections
쐍 Meets PB2 Standards
쐍 Rear Cable Barrier Available for Top
Load Cable Exit
8
Commercial Metering
Switchboards
Type MMS
Features
쐍 Up to 4000A Main Service, 120 /
240V, 240V, 208Y / 120V, 480Y /
277V, 480V, 1쏗3W, 3쏗3W, 3쏗4W
쐍 100A or 200A Tenant Mains are
Interchangeable
쐍 UL Listed and Labeled
쐍 Hot Sequence Metering is Standard;
Cold Sequence also Available
쐍 50,000A Symmetrical Bus Bracing
(higher available if required)
쐍 All Meter Sockets are Pre-Wired for
100A or 200A Devices
CSI Section 16470
쐍
쐍
쐍
쐍
쐍
쐍
쐍
Copper or Aluminum Bus Available
All Units Front Accessible
Type 3R Construction Available
Available with Cable Pull Sections
and Corner Sections
Sockets are 200A Rated with Lever
Type Manual Bypass
Load Cable Exit Top or Bottom
Common Depth for Main and
Metering Sections upon Request
Siemens Electrical Products and Systems
Specification Guide
145
Commercial Metering Switchboards
Meter Sections
General
Type SMM / SMD — For
EUSERC Utility Area
Installations
Type SMM Service Multi-Metering
switchboards are specifically designed
with built-in flexibility for all types of
multi-metering commercial and industrial
applications.
Features
쐍 4000 Amperes Main Service 480
Volt Maximum
쐍 200 Ampere Continuous Duty
Metering Sockets
쐍 With Test Blocks
쐍 Meets EUSERC Requirements
쐍 UL Listed and Labeled
쐍 Hot Sequence Metering Standard
쐍 All Meter Sockets Are Prewired
쐍 Copper or Aluminum Bus
쐍 65,000A Sym Bracing Standard
(Higher Bracing Available if
Required)
쐍 Type 3R Construction Available
쐍 Available With Corner Sections
쐍 Meets PB2 Standards
쐍 Rear Cable Barrier Available for Top
Load Cable Exit
8
Commercial Metering
Switchboards
Type MMS
Features
쐍 Up to 4000A Main Service, 120 /
240V, 240V, 208Y / 120V, 480Y /
277V, 480V, 1쏗3W, 3쏗3W, 3쏗4W
쐍 100A or 200A Tenant Mains are
Interchangeable
쐍 UL Listed and Labeled
쐍 Hot Sequence Metering is Standard;
Cold Sequence also Available
쐍 50,000A Symmetrical Bus Bracing
(higher available if required)
쐍 All Meter Sockets are Pre-Wired for
100A or 200A Devices
CSI Section 16470
쐍
쐍
쐍
쐍
쐍
쐍
쐍
Copper or Aluminum Bus Available
All Units Front Accessible
Type 3R Construction Available
Available with Cable Pull Sections
and Corner Sections
Sockets are 200A Rated with Lever
Type Manual Bypass
Load Cable Exit Top or Bottom
Common Depth for Main and
Metering Sections upon Request
Siemens Electrical Products and Systems
Specification Guide
145
Commercial Metering Switchboards
Meter Sections
General
Type SMM / SMD — For EUSERC Utility Area Installations
Table 8.1 — Type SMM/SMD Meter Sections Checklist
Cabling
Protective
Device
T-Fuse Pullout
Circuit Breaker
Service
Sockets
Fusible Switches
Top Load
480 / 277V, 480V,
240, 208Y / 120
3 Phase 3 Wire
3 Phase 4 Wire
Available with 200 A sockets,
Test Blocks. Wiring for 100 or 200A
depending on tenant mains, which
are interchangeable with field
installation kit (cable not included).
—
If load cables exit top, a rear load
cable barrier or loadside
wireway must be added.
Vacu-Break 240V
120 / 240V, 480V,
240V, 208Y / 120
1 Phase 3 Wire
3 Phase 3 Wire
3 Phase 4 Wire
Vacu-Break 480V
480 / 277V, 480V,
3 Phase 3 Wire
3 Phase 4 Wire
100 and 200A switches are
field interchangeable
Directly into
Metering Section
Lugs required. A full-size
meter section must be used.
A 20 in. (508 mm) high pullbox
required for top entry. Bottom
entry not available. A 20 in.
(508 mm) wide section with
incoming lugs requires a
pull section.
Lugs required. A full-size
meter section must be used.
A 20 in. (508 mm) top hat or
transition section may be
required depending upon
the direction of the feed and
location of load disconnects.
Circuit Breaker / T-Fuse Pullout
Commercial Metering
Switchboards
8
Bottom Load
Full-size Section
Bottom Load
Half Section
Vacu-Break
Half Section
Available in
240V Only
Bottom Load
Half Section
146
Full Section
Available in
480Y Only
Bottom Load
Full-size Section
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Commercial Metering Switchboards
Meter Sections
General
Type MMS
Table 8.2
Type MMS Meter Sections Checklist
Protective Device Service
480 / 277V, 480V,
T-Fuse Pullout
240, 208Y / 120
3 Phase 3 Wire
Circuit Breaker
3 Phase 4 Wire
Vacu-Break 240V
120 / 240V, 480V,
240V, 208Y / 120
1 Phase 3 Wire
3 Phase 3 Wire
3 Phase 4 Wire
Vacu-Break 480V
480 / 277V, 480V,
3 Phase 3 Wire
3 Phase 4 Wire
Sockets
Cabling
200A, Includes a manual bypass lever.
Wiring for 100 or 200A depending on
tenant mains, which are interchangeable
with field installation kit (cable not included).
When cable is brought directly into
meter section, a full-size meter section
is required. A 20 in. (508 mm) high top pull box
is required for top entry. Bottom entry not
available. A transition section may be required
depending on direction of feed and location
of tenant mains.
Circuit Breaker / T-Fuse Pullout
8
Commercial Metering
Switchboards
Top Load
Half Section
Bottom Load
Full-size Section
Vacu-Break
Bottom Load 240V Only햲
Half Section
햲
Top Load 240V Only햲
Full-size Section
480V Sections are available.
CSI Section 16470
Siemens Electrical Products and Systems
Specification Guide
147
Commercial Metering Switchboards
Disconnect Ratings
Technical
Type SMM / SMD and MMS
Table 8.5 —
Main Vacu-Break® Switches
Table 8.3 Main Circuit Breakers
Commercial Metering
Switchboards
8
Siemens
Ampere Breaker Type
Rating For SMM
JXD2
JXD6
JD6, SJD6
400
HJD6 / SHJD6
—
LD6, SLD6
HLD6 / SHLD6
600
LXD6
—
MD6 / LMD6 / SMD6
800 HMD6 / HLMD6 / SHMD6
—
ND6 / SND6
1000
HND6 / SHND6
ND6, SND6
HND6 / SHND6
1200
—
PD6 / SPD6
HPD6 / SHPD6
1600
—
RD6
2000
SBS
2500
SBS
3000
For MMS
JXD2
JXD6
JD6, SJD6
HJD6 / SHJD6
CJD6, SCJD6
LD6, SLD6
HLD6 / SHLD6
LXD6
CLD6, SCLD6
MD6 / LMD6 / SMD6
HMD6 / HLMD6 / SHMD6
CMD6, SCMD6
ND6 / SND6
HND6 / SHND6
ND6 / SND6
HND6 / SHND6
CND6 / SCND6
PD6 / SPD6
HPD6 / SHPD6
CPD6
RD6
SBS
SBS
Maximum Interrupting Capacity
Symmetrical RMS Amperes
480 V
240 V
65,000
—
65,000
35,000
100,000
200,000
65,000
100,000
65,000
200,000
65,000
100,000
200,000
65,000
100,000
65,000
100,000
200,000
65,000
100,000
200,000
65,000
100,000
100,000
65,000
150,000
35,000
65,000
35,000
150,000
50,000
65,000
100,000
50,000
65,000
50,000
65,000
100,000
50,000
65,000
100,000
50,000
100,000
100,000
Maximum
Fuse For
Interrupting Capacity
Switchboard Symmetrical
RMS Amperes
Ampere Type
Rating
SMM MMS 240 Volt
480 Volt
R
J, R, T
400
100,000
100,000
R
J, R, T
600
100,000
100,000
L
L
800
100,000
100,000
L
L
1200
100,000
100,000
Table 8.6 Branch Vacu-Break®
Fusible Switches
Maximum
Fuse For
Interrupting Capacity
Switchboard Symmetrical
Type
RMS Amperes
Ampere
Rating
480 Volt
SMM MMS 240 Volt
J
J, T
200,000
100,000
100
—
R
R
100,000
J
J, T
200,000
100,000
200
R
R
42,000
42,000
Table 8.7 —
Main Bolted Pressure Switches
Maximum
Fuse For
Interrupting Capacity
Switchboard Symmetrical
Type
RMS Amperes
Ampere
Rating
SMM MMS 240 Volt
480 Volt
L
L
800–4000
200,000
200,000
Table 8.4 Tenant Circuit Breakers with Commercial Meter Sockets
Maximum Interrupting
Capacity Symmetrical
RMS Amperes
10,000
22,000
42,000
햲 100A
148
Table 8.8
480 V
240 V
Ampere
Rating
100
200
Breaker
Type햲
2, 3 Pole
BQ
QJ2
100
BHQ
200
100
200
QJH2
HBQ
QJ2-H
Maximum Interrupting
Capacity Symmetrical
RMS Amperes
18,000
30,000
42,000
Ampere
Rating
100
200
Breaker
Type 햲
2, 3 Pole
ED4
FD6
100
HED4
200
100
200
FD6
HHED6
HFD6
and 200A tenant circuit breakers may be specified within same AIC grouping only.
Siemens Electrical Products and Systems
Specification Guide
Fusible Pullouts
Maximum
Fuse For
Interrupting Capacity
Switchboard Symmetrical
RMS Amperes
Ampere Type
Rating
SMM MMS 240 Volt
480 Volt
T
T
100
200,000
200,000
T
T
200
200,000
200,000
Table 8.9
Main HCP Switches
Maximum
Fuse For
Interrupting Capacity
SMM & MMS Symmetrical
RMS Amperes
Ampere
Rating
240V 480V
240 Volt
480 Volt
T
L
800
200,000
200,000
T
L
1200
200,000
200,000
CSI Section 16470
Commercial Metering Switchboards
Type SMM / SMD — For EUSERC Utility Area Installations
Dimensions
Circuit Breaker Main
Table 8.11
Table 8.10 Circuit Breaker Main With
Underground Pull Section
32
(813)
90
(2286)
D2
20
(508)
38
(965)
46
(1168)
11.5
(292)
28
(711)
Ampere Rating
400
600
800
1000
1200
1600
2000
2500
3000
Dimensions in Inches (mm)
H
W
D1
90
(2286)
32
(813)
D2
20
(508)
11.5
(292)
38
(965)
8
28
(711)
Commercial Metering
Switchboards
Ampere Rating
400
600
800
1000
1200
1600
2000
Dimensions in Inches (mm)
H
W
D1
Circuit Breaker Main Without Pull Section
Fusible Switch Main
Table 8.13 Vacu-Break and HCP Main Without
Pull Section
Table 8.12 Vacu-Break and HCP Main With
Underground Pull Section
Switch
Type
Vacu
Break
HCP
Ampere
Rating
400
600
800
1200
800
1200
CSI Section 16470
Dimensions in Inches (mm)
H
W
D1
32
(813)
90
(2286)
38
(965)
D2
20
(508)
28
(711)
20
(508)
11.5
(292)
Switch
Type
Vacu
Break
HCP
Ampere
Rating
400
600
800
1200
800
1200
Siemens Electrical Products and Systems
Specification Guide
Dimensions in Inches (mm)
H
W
D1
32
20
(813)
(508)
90
(2286)
38
(965)
28
(711)
D2
11.5
(292)
20
(508)
149
Commercial Metering Switchboards
Type SMM / SMD — For EUSERC Utility Area Installations
Dimensions
Bolted Pressure Switch
Table 8.15
Table 8.14 Bolted Pressure Switch Main With
Underground Pull Section
Ampere Rating
800
1200
1600
2000
Commercial Metering
Switchboards
8
Dimensions in Inches (mm)
H
W
D1
90
(2286)
38
(965)
46
(1168)
Dimensions in Inches (mm)
H
W
D1
Ampere Rating
800
1200
1600
2000
2500
3000
4000
D2
28
(711)
Bolted Pressure Switch Without Pull Sections
11.5
(292)
38
(965)
90
(2286)
28
(711)
D2
11.5
(292)
46 (1168)
52
(1321)
38
(965)
Meter Sections
Circuit Breaker and T-Fuse Pullout
Table 8.16
Maximum
Cross Bus
Ampere
Rating
800–2500
NEMA 1 Dimensions In Inches (mm)
Circuit Breaker with Test Block
H
90
(2286)
Max.
Voltage
480
No. of
Sockets
3
6
3
6
W
20 (508)
32 (813)
20 (508)
32 (813)
480V Only
Vacu-Break Switches
Type SMM / SMD Meter Section Dimensions
3000–4000
햲
240V Only
Vacu-Break
D
20
(508)
28
(711)
Max.
Voltage
240
480햲
240
480햲
No. of
Sockets
2
6
2
6
W
20 (508)
58 (1473)
20 (508)
58 (1473)
D
20
(508)
28
(711)
NEMA 3R
Dimensions In Inches (mm)
W
H
CB
VB
26 (660)
26 (660)
38 (965)
61 (1549)
91
(2311)
26 (660)
26 (660)
38 (965)
61 (1549)
D
31.5
(800)
39.5
(1003)
Available with or without test blocks.
150
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Commercial Metering Switchboards
Type MMS
Dimensions
Circuit Breaker and T-Fuse Pullout Sections
Top Load
Top Load
Bottom Load
Bottom Load
Vacu-Break Sections
8
Commercial Metering
Switchboards
Top Load
240V Unit
Table 8.17
Top Load
240V Unit
Top Load
480V Unit
Bottom Load
240V Unit
Bottom Load
240V Unit
Type MMS Meter Section Dimensions
Circuit Breaker or T-Fuse Pullout
Vacu-Break
Dimensions
in Inches (mm)
Socket
Amp
Rating
200
Bottom Load
480V Unit
Max.
Voltage
240 or
480
Load
Top
Bottom
Top
Bottom
CSI Section 16470
No. of
Sockets
2
3
4
6
H
20
(2286)
W
20
(508)
32
(813)
Dimensions
in Inches (mm)
D
NEMA
1
3R
Socket
Amp
Rating
20
(508)
31
(787)
100 or
200
Max.
Voltage
240
Load
Top or
Bottom
480
Siemens Electrical Products and Systems
Specification Guide
No. of
Sockets
2
4
4
H
90
(2286)
W
20 (508)
38 (965)
D
NEMA
1
3R
20
(508)
31
(787)
46 (1168)
151
Commercial Metering Switchboards
Auxiliary Sections
Dimensions
Types SMM / SMD and MMS
D
D
D
Bussed
Pull Section
Non Bussed
Pull Section
Transition
Section
H2
Commercial Metering
Switchboards
8
D
D
Load Side Wireway
Top Pull Box
Table 8.18 Types SMM/SMD and MMS Auxiliary Sections Dimensions
Section
Dimensions in Inches (mm)
NEMA 1
H
Non Bussed Pull Section
EUSERC
Bussed UGPS
W/Utility Studs
H1-90 (2286)
Bussed Pull Section
Transition Section
Load Side Wireway
Top Pull Box
H2-10 (254) 햲
햲 Other standard heights 15 in. (381 mm) and 20 in. (508 mm).
햳 14 in. (356 mm) minimum width. Pull section widths may vary
햴 Add 11.5 in. (292 mm) for EUSERC Sections
152
W
14 (356)
20 (508)
32 (812)
38 (965)
32 (813)
38 (965)
46 (1168)
52 (1321)
20 (508)
32 (813)
38 (965)
20 (508) min.
14 (356)
20 (508)
14 (356) min. 햳
D
NEMA 3R
H1
D
94.25 (2394)
Same as Main Section
91 (2311)
11 (279) 햴
94.25 (2394)
Same as Metering Section
Same as Main Section
depending on local utility requirements.
Siemens Electrical Products and Systems
Specification Guide
CSI Section 16470
Commercial Metering Switchboards
Type SMM / SMD — For EUSERC Utility Area Installations
1. Scope
Furnish and install, as shown on the
plans, a metering switchboard as
specified herein, for the system
indicated below:
앮 120 / 240
앮 1-phase 앮 3-wire
앮 208Y / 120V 앮 3-phase 앮 4-wire
앮 480Y / 277V 앮 phase 앮 wire
앮 480V
앮 ______V
2. Configuration
The switchboard enclosure shall be:
앮 Type 1 indoor construction
앮 Type 3R outdoor construction
CSI Section 16470
5. Load Cables shall
Exit 앮 Top 앮 Bottom
6. Bus Requirements
The bus shall be 앮 tin plated aluminum, 앮 silver plated copper of
sufficient size to limit the temperature
rise to 65°C, based on UL tests. The
bus shall be braced for 앮 50,000,
앮 75,000, 앮 100,000, 앮 200,000
amperes symmetrical and supported
to withstand mechanical forces
exerted during short circuit conditions
when directly connected to a power
source having the indicated available
short circuit current. Provide a full
capacity neutral when a neutral is
indicated on the drawings.
The through bus on the end metering
section shall be extended and predrilled to allow the addition of future
sections with standard splice plates.
Ground bus and lugs shall be furnished
— Ground bus shall extend the entire
length of the switchboard and shall be
firmly secured to each vertical section.
Siemens Electrical Products and Systems
Specification Guide
7. Main Protective Device
(Select one of Item #C)
The main protective device, to be
installed in the main device section,
shall be as indicated below:
C-1 Molded case circuit breaker shall
be of the quick-make, quick-break,
trip-free, (heavy duty) (extra heavy
duty) (solid state) type. It shall be
_____ frame (2-pole) (3-pole) 600volt breaker with trip current rating
of:
앮 400A 앮 600A 앮 800A
앮 1000A 앮 1200A 앮 1600A
앮 2000A 앮 2500A 앮 3000A of
an interrupting capacity of not less
than____amperes RMS symmetrical at the system voltage. The following accessory features are to
be included:
앮 Shunt Trip, 앮 Ground Fault
Relay, 앮 Electrical Operator,
앮 Integral ground fault trip (for
solid state Sensitrip II breakers
only). 앮 Other______(list)
C-2 Fusible switch of the quick-make,
quick-break type. It shall be a (2pole) (3-pole) (240V) (600V) VacuBreak unit with a continuous current rating of (400) (600) (800)
(1200) amperes and with ____
ampere class ____ fuses, suitable
for application on a system with
_____ amperes symmetrical available fault current.
C-3 Bolted pressure switch of the
quick-make, quick-break type. It
shall be 3-pole, 앮 240V, 앮 480V
unit with a continuous current rating of: 앮 800A, 앮 1200A 앮
1600A 앮 2000A 앮 2500A 앮
3000A 앮 4000A. Provisions for
Class L fuses shall be provided
complete with mounting hardware.
The following accessory features
are to be included: 앮 Shunt Trip,
앮 Ground Fault Relay, 앮 Electrical
Operator, 앮 Other _____(list)
153
8
Commercial Metering
Switchboards
3. General
The complete switchboard shall be
phosphatized and finished with light
gray, ANSI-61 paint.
Each switchboard section shall have a
nameplate permanently affixed to it,
listing the following information:
Name of manufacturer, System
Voltage, Ampacity, Type,
Manufacturer’s shop order number
and date of manufacture.
Each section of switchboard shall be
of the required number of vertical sections bolted together to form one
metal enclosed rigid switchboard. The
sides, top and rear shall be covered
with removable screw-on code gauge
steel plates. Switchboard shall include
all protective devices and equipment
as listed on drawings with necessary
interconnections, instrumentation and
control wiring.
Switchboard shall be constructed in
accordance with the latest NEMA
PB-2 and UL 891 standards.
Meter sockets shall contain (test
block) (lever bypass). Meter sockets
shall be rated (100A) (200A) continuous duty.
4. Incoming Service
1. Underground Service:
To isolate incoming underground
service conductors, an underground
cable pull or auxiliary section shall
be used. This section shall be of
the 앮 nonbussed, 앮 bussed type
and shall be sealable per local utility
requirements, 앮 utility studs,
앮 screw-type mechanical lugs,
앮 compression lugs to terminate,
앮 aluminum, 앮 copper cable,
shall be furnished as detailed on
the plans.
2. Overhead Service: Cable entry 앮 utility studs, 앮 screw-type mechanical
lugs, 앮 compression lugs to terminate, 앮 aluminum, 앮 copper cable
shall be furnished as detailed on the
plans. Where necessary provide top
cable pull box which shall be sealable
per local utility requirements.
Specifications
Commercial Metering Switchboards
Type SMM / SMD — For EUSERC Utility Area Installations
8. Tenant Branch Protective Devices
(Select one of Item #D)
All molded case circuit breakers, fusible
switches, or fusible pullouts, used as a
protective device in a branch circuit will
meet the requirements of the appropriate
paragraph below.
D-1 Molded case circuit breakers shall
be of quick-make, quick-break, trip
free thermal magnetic type, with
frame, trip and voltage ratings,
either 2-pole or 3-pole, as indicated on the plans. All breakers shall
have an interrupting capacity of
not less than ______ amperes
RMS symmetrical at the system
voltage. All breakers shall be
removable from the front of the
switchboard without disturbing
adjacent units. The switchboard
shall have space or provisions for
future units as shown on the plans.
D-2 Current limiting circuit breakers
shall provide inverse time delay,
instantaneous circuit protection,
and also limit the let-through l2t of
one-half cycle wave of the symmetrical prospective current without any fusible elements. Breakers
shall have an interrupting capacity
of not less than ____ amperes
RMS symmetrical at the system
voltage.
D-3 Fusible switches shall be quickmake, quick-break units utilizing
the double-break principle of circuit interrupting to minimize arcing
and pitting and shall conform to
the ratings shown on the plans.
Specifications
Each switch shall have an individual door over the front, equipped
with a voidable interlock that prevents the door from being opened
when the switch is in the ON position unless the interlock is purposely defeated by activation of
the voiding mechanism. All
Switches shall have externally
operated handles. Switches shall
be equipped with 앮 NEC standard, 앮 Class R rejection type
fuse holders, and class 앮 H,
앮 RK1, 앮 RK5, 앮 J and
앮 T fuses of ampere rating and
type as indicated on the plans suitable for application on system
with ____ampere symmetrical
available fault current.
D-4 Fusible pullouts for class T fuses.
Commercial Metering
Switchboards
8
Typical One-Line
Horizontal Bus
Horizontal Bus
Type MMS
The Service Section(s) for (lighting)
(power) (lighting and power) shall be suitable for (underground) (overhead) service
from _________Power Company lines.
The Service Section shall contain space
and mounting facilities for terminating
power company cables in the ampere ratings and quantities shown on the plans.
154
Branch disconnects shall be (Siemens
type BQ, QJ, etc...., quick-make, quickbreak thermal-magnetic circuit breakers)
(Siemens type Vacu-Break quick-make,
quick-break fusible switches) in the ratings and quantities shown on the plans.
The main disconnect, when required,
shall be installed in an enclosure to
Siemens Electrical Products and Systems
Specification Guide
match the Service Section(s). Enclosures
shall be bolted together and electrically
connected by horizontal bus bar to form a
complete assembly.
Meter sockets shall contain (test block)
(lever bypass). Meter sockets shall be
rated (100A) (200A).
CSI Section 16470