Section [26 24 16.11] [16442]
PANELBOARDS
Square DTM by Schneider Electric
I-Line Combo Panelboards
PART 1
GENERAL
1.1
SUMMARY
A.
Scope: Provide labor, material, equipment, related services, and supervision required, including, but
not limited to, manufacturing, fabrication, erection, and installation for panelboards as required for the
complete performance of the work, and as shown on the Drawings and as herein specified.
B.
Section Includes: The work specified in this Section includes, but shall not be limited to, distribution
panelboards as specified herein and where shown on the associated schedules and the Drawings.
C.
Related Sections: Related sections include, but shall not be limited to, the following:
1.2
1.
[Section 26 28 00 - Overcurrent Protective Devices] [Section 16280 - Surge Protective Devices].
2.
[Section 26 09 13 - Electrical Power Monitoring and Control] [Section13810 - Energy Monitoring
and Control Systems].
3.
[Section 26 09 26 - Lighting Control Panelboards] [Section 16440 - Remote Controlled Lighting
Panelboard Systems].
REFERENCES
A.
General: The publications listed below form a part of this Specification to the extent referenced. The
publications are referred to in the text by the basic designation only. The edition/revision of the
referenced publications shall be the latest date as of the date of the Contract Documents, unless
otherwise specified.
B.
American Society of Civil Engineers (ASCE):
1.
C.
D.
ASCE 7, "Minimum Design Loads for Buildings and Other Structures."
Canadian Standards Association (CSA):
1.
CSA C22.2 No. 5, “Molded Case Circuit Breakers, Molded Case Switches and Circuit Breaker
Enclosures.”
2.
CSA C22.2 No. 29, “Panelboards and Enclosed Panelboards.”
Federal Specifications (FS):
1.
FS W-C-375, "Circuit Breakers, Molded Case, Branch Circuit and Service."
Section [26 24 16.11] [16442]
Panelboards
Page 1
03/08/2016
Square DTM by Schneider Electric
2.
E.
F.
G.
H.
1.3
FS W-P-115, "Panel, Power Distribution."
International Code Council (ICC):
1.
ICC IBC, "International Building Code."
2.
ICC IBC Section 1621, “Architectural, Mechanical, and Electrical Component Seismic Design
Requirements.”
National Electrical Manufacturers Association (NEMA):
1.
NEMA AB 1, "Molded Case Circuit Breakers and Molded Case Switches."
2.
NEMA PB 1, "Panelboards."
3.
NEMA PB 1.1, "General Instructions for Proper Installation, Operation and Maintenance of
Panelboards Rated 600 Volts or Less."
National Fire Protection Association (NFPA):
1.
NFPA 70, "National Electrical Code," hereinafter referred to as NEC.
2.
NFPA 5000, “Building Construction and Safety Code.”
Underwriters Laboratories, Inc. (UL):
1.
UL 50, "Enclosures for Electrical Equipment, Non-Environmental Considerations.”
2.
UL 67, "Standard for Panelboards."
3.
UL 489, "Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker
Enclosures.”
SUBMITTALS
A.
General: See [Section 01 33 00 - Submittal Procedures] [Section 01300 - Submittals].
B.
Product Data: Submit product data showing material proposed. Submit sufficient information to
determine compliance with the Drawings and Specifications.
1.
C.
Shop Drawings: Submit shop drawings for each product and accessory required. Include information
not fully detailed in manufacturer’s standard product data.
1.
D.
Manufacturer shall provide installation instructions. Comply with NEMA PB 1.1.
Drawings shall include, but shall not be limited to, overall panelboard dimensions, interior
mounting dimensions, and wiring gutter dimensions. The location of the main, which can be
placed anywhere along the I-Line bus, shall be clearly shown. The branches and solid neutral
shall be clearly shown. In addition, the shop drawings shall illustrate one-line diagrams with
applicable voltage systems.
Wiring Diagrams: Submit wiring diagrams detailing power, signal, and control systems, clearly
differentiating between manufacturer-installed wiring and field-installed wiring, and between
components provided by the manufacturer and those provided by others.
Section [26 24 16.11] [16442]
Panelboards
Page 2
03/08/2016
Square DTM by Schneider Electric
E.
1.4
Operation and Maintenance Data: Submit operation and maintenance data for panelboards to include
in operation and maintenance manuals.
QUALITY ASSURANCE
A.
B.
Qualifications:
1.
Manufacturer Qualifications: Manufacturer shall be a firm engaged in the manufacture of
panelboards of types and sizes required, and whose products have been in satisfactory use in
similar service for a minimum of 50 years.
2.
Installer Qualifications: Installer shall be a firm that shall have a minimum of five years of
successful installation experience with projects utilizing panelboards similar in type and scope to
that required for this Project.
Regulatory Requirements: Comply with applicable requirements of the laws, codes, ordinances, and
regulations of Federal, State, and local authorities having jurisdiction. Obtain necessary approvals from
such authorities.
1.
C.
Without limiting the generality of other requirements of this Section, all work specified herein shall
conform to or exceed the applicable requirements of the following standards; provided, that
wherever the provisions of said publications are in conflict with the requirements specified herein,
the more stringent requirements shall apply:
a.
ASCE 7 (seismic compliance requirements).
b.
CSA C22.2 No. 5.
c.
CSA C22.2 No. 29.
d.
FS W-C-375.
e.
FS W-P-115 (Type I, Class 1).
f.
ICC IBC and ICC IBC Section 1621.
g.
NEMA AB 1 - Molded Case Circuit Breakers
h.
NEMA PB 1.
i.
NEMA PB 1.1.
j.
NEC.
k.
NFPA 5000 (seismic compliance requirements).
l.
UL 50.
m.
UL 67.
n.
UL 489.
Pre-Installation Conference: Prior to commencing the installation, meet at the Project site to review the
material selections, installation procedures, and coordination with other trades. Pre-installation
conference shall include, but shall not be limited to, the Contractor, the Installer, manufacturer’s
representatives, and any trade that requires coordination with the work. Date and time of the pre-
Section [26 24 16.11] [16442]
Panelboards
Page 3
03/08/2016
Square DTM by Schneider Electric
installation conference shall be acceptable to the Owner and the Architect.
D.
1.5
Single Source Responsibility: Obtain panelboards and required accessories from a single source with
resources to produce products of consistent quality in appearance and physical properties without
delaying the work. Any materials which are not produced by the manufacturer shall be acceptable to
and approved by the manufacturer.
DELIVERY, STORAGE, AND HANDLING
A.
Deliver materials to the Project site in supplier’s or manufacturer’s original wrappings and containers,
labeled with supplier’s or manufacturer’s name, material or product brand name, and lot number, if any.
B.
Store materials in their original, undamaged packages and containers, inside a well-ventilated area
protected from weather, moisture, soiling, extreme temperatures, and humidity.
1.
Store in a clean, dry environment. Maintain factory packaging and, if required, provide an
additional heavy canvas or heavy plastic cover to protect enclosures from dirt, water, construction
debris, and traffic.
C.
Inspect and report concealed damage to carrier within their required time period.
D.
Handle carefully to avoid damage to panelboard internal components, enclosure, and finish.
PART 2
PRODUCTS
2.1
MANUFACTURERS
A.
Product specified shall be “I-LINE - Class 2110” as manufactured by Square D by Schneider Electric.
Items specified are to establish a standard of quality for design, function, materials, and appearance.
Equivalent products by other manufacturers are acceptable. The Design Professional will be the sole
judge of the basis of what is equivalent.
1.
2.2
Substitutions shall be submitted in writing three weeks prior to original bid date with supporting
documentation demonstrating that the alternate manufacturer meets all aspects of the Section
herein.
POWER DISTRIBUTION PANELBOARDS
A.
I-LINE Combo, Distribution and Lighting, Panelboard
1.
Interior:
a.
Shall be Square D I-LINE Combo type rated 600Y/347 volts AC maximum or 48 volts DC
maximum. Continuous main current ratings shall be as indicated on associated schedules
and the Drawings, not to exceed 1200 amperes maximum. Panelboard ratings (bus ratings,
heat rise, etc.) shall be conducted in accordance with, and witnessed by, UL as per UL67.
b.
Provide UL-listed short circuit current ratings (SCCR) as indicated on the associated
schedules and the Drawings, not to exceed the lowest interrupting capacity rating of any
circuit breaker installed with a maximum of 200,000 RMS symmetrical amperes.
c.
The horizontally oriented power distribution section shall have three flat bus bars stacked
and aligned with glass reinforced polyester insulators laminated between phases. The
molded polyester insulators shall support and provide phase isolation the entire length of
Section [26 24 16.11] [16442]
Panelboards
Page 4
03/08/2016
Square DTM by Schneider Electric
bus.
2.
d.
Lighting sections shall be provided with one or more continuous bus bar(s) per phase.
Each bus bar shall have sequentially phased branch circuit connectors suitable in NQI
sections as plug-on or bolt-on branch circuit breakers or bolt-on branch circuit breakers in
NFI sections. The bussing shall be fully rated or tapered. Panelboards shall be rated in
accordance with, and witnessed by, UL as per UL67 specification for panelboards. Current
carrying parts shall be insulated from ground and phase-to-phase by high dielectric
strength thermoplastic.
e.
The bussing shall be sequentially phased branch distribution. Fully rated panelboard
bussing shall be available up to 800 amperes (copper) and 400 amperes (aluminum).
Tapered bussing is available up to 1200 amperes.
f.
Interior trim shall be of deadfront construction to shield user from energized parts. Main
circuit breaker and main lug interiors shall be field convertible for top or bottom incoming
feed. The main incoming device located on the power distribution section shall be oriented
at the bottom of the enclosure.
g.
A solidly bonded [aluminum] [copper] equipment ground bar shall be provided. [An
additional [aluminum] [copper] isolated/insulated ground bar shall also be provided when
specified.]
h.
Solid neutral shall be equipped with a full capacity bonding strap for service entrance
applications. [UL-listed panelboards with 200 percent rated solid neutrals shall have plated
copper neutral bus for non-linear load applications.]
i.
Nameplates shall contain system information and catalog number or factory order number.
UL-listed label and short circuit current rating shall be displayed on the interior or in a
booklet format. Leveling provisions shall be provided for flush mounted applications.
Power Section Circuit Breakers:
a.
Circuit breakers shall be group mounted plug-on with mechanical restraint on a common
pan or rail assembly.
b.
The interior shall have three flat bus bars stacked and aligned vertically with glass
reinforced polyester insulators laminated between phases. The molded polyester insulators
shall support and provide phase isolation to the entire length of bus.
c.
Circuit breakers equipped with line terminal jaws shall not require additional external
mounting hardware. Circuit breakers shall be held in mounted position by a self-contained
bracket secured to the mounting pan by fasteners. Circuit breakers of different frame sizes
shall be capable of being mounted side by side without restriction.
d.
Line-side circuit breaker connections shall be jaw type.
e.
Unused spaces provided shall be fully equipped for future devices, including, but not limited
to, appropriate connectors and mounting hardware (excludes individual breaker
Section [26 24 16.11] [16442]
Panelboards
Page 5
03/08/2016
Square DTM by Schneider Electric
communication equipment).
f.
3.
Provide Square D type circuit breakers. Circuit breakers shall be CSA and UL-listed with
amperage ratings, interrupting ratings, and number of poles as indicated and scheduled on
the Drawings.
I-Line Combo Panelboard Molded Case and Miniature Circuit Breaker Characteristics:
a.
Distribution section circuit breakers shall comply with [Section 26 28 16.14 - Enclosed
Switches and Circuit Breakers] [Section 16410.5 - Enclosed Switches and Circuit
Breakers], which includes, but shall not be limited to, thermal magnetic devices, equipment
ground fault protection devices, electronic trip circuit breakers with STR trip system and
electronic trip circuit breakers with MICROLOGIC trip system.
b.
NQ Lighting Section Miniature Circuit Breakers:
1)
Shall be Square D Type QO/QOB circuit breakers.
2)
Shall have an overcenter, trip-free, toggle mechanism which shall provide quickmake, quick-break contact action. Circuit breakers shall have a permanent trip unit
with thermal and magnetic trip elements in each pole. Each thermal element shall be
true RMS sensing and shall be factory-calibrated to operate in a 40 degrees C
ambient environment. Thermal elements shall be ambient compensating above 40
degrees C.
3)
Two-pole and three-pole circuit breakers shall have common tripping of all poles.
4)
When tripped the circuit breaker shall reside in a position between on and off. The
circuit breaker shall provide a visible trip indication on the faceplate of the breaker.
5)
Breaker handle and faceplate shall indicate rated ampacity. Standard construction
circuit breakers shall be UL-listed for reverse connection with the use of line or load
markings.
6)
Circuit breaker escutcheon shall have international I/O markings, in addition to
standard on/off markings. Circuit breaker handle accessories shall provide provisions
for locking handle in the on or off position.
7)
Lugs shall be CSA and UL-listed to accept solid or stranded [copper and aluminum
conductors] [copper conductors only]. Lugs shall be suitable for [75 degrees C rated
wire] [90 degrees C rated wire, sized according to the 75 degrees C temperature
rating per NEC Table 310-16]. Lug body shall be bolted in place; snap-in designs are
not acceptable.
8)
The circuit breakers shall be CSA and UL-listed for use with the following
accessories:
Section [26 24 16.11] [16442]
Panelboards
a)
Shunt trip.
b)
Under voltage trip.
c)
Ground fault shunt trip.
Page 6
03/08/2016
Square DTM by Schneider Electric
c.
d)
Auxiliary switch.
e)
Alarm switch.
f)
Mechanical lug kits.
g)
Compression lug kits for E-frame and I-line circuit breakers.
9)
Shall have [bolt-on] [plug-on] type bus connectors.
10)
The exposed faceplates of branch circuit breakers shall be flush with one another.
NF Lighting Section Miniature Circuit Breakers:
1)
Shall be Square D type circuit breakers. Circuit breakers shall be CSA and UL-listed
with amperage ratings, interrupting ratings, and number of poles as indicated on the
panelboard schedules and the Drawings.
2)
Molded case branch circuit breakers shall have bolt-on type bus connectors.
3)
Circuit breakers shall have an overcenter toggle mechanism which shall provide
quick-make, quick-break contact action. Circuit breakers shall have thermal and
magnetic trip elements in each pole.
4)
Two-pole and three-pole circuit breakers shall have common tripping of all poles.
5)
When tripped the circuit breaker shall reside in a position between on and off. The
circuit breaker shall provide a visible trip indication on the faceplate of the breaker.
6)
The exposed faceplates of branch circuit breakers shall be flush with one another.
7)
Lugs shall be UL-listed to accept solid or stranded [copper and aluminum
conductors] [copper conductors only]. Lugs shall be suitable for [75 degrees C rated
wire] [90 degrees C rated wire, sized according to the 75 degrees C temperature
rating per NEC Table 310-16].
8)
Breakers shall be CSA and UL-listed for use with the following factory installed
accessories:
9)
a)
Shunt trip.
b)
Auxiliary switch.
c)
Alarm switch.
Breaker shall be CSA and UL-listed with the following ratings:
a)
Section [26 24 16.11] [16442]
Panelboards
15 to 110 amperes; heating, air conditioning, and refrigeration (HACR).
Page 7
03/08/2016
Square DTM by Schneider Electric
15 to 30 amperes; high intensity discharge (HID).
c)
15 to 20 amperes; switch duty (SWD).
d)
15 to 50 amperes; equipment protection device (EPD) (480Y/277 volts AC
maximum).
4.
Surge Protective Devices: Surge protection devices in the I-Line combo panelboard shall comply
with [Section 26 28 00 - Overcurrent Protective Devices] [Section 16280 - Surge Protective
Devices].
5.
Enclosures:
a.
b.
c.
Type 1 Boxes:
1)
Boxes shall be hot-dip galvanized steel constructed in accordance with UL 50
requirements. Unpainted galvannealed steel is not acceptable.
2)
Boxes shall have interior mounting studs. Interior support bracket shall be provided
for ease of interior installation.
Type 1 Trim Fronts:
1)
Trim front steel shall meet strength and rigidity requirements per UL 50 standards
and shall be painted with enamel electrodeposited over cleaned phosphatized steel.
2)
Trim front shall be [four-piece surface] [four-piece with door] [hinged one-piece with
door] available in [flush] [surface] mount. Trim front door shall have rounded corners
and edges free of burrs. A clear plastic directory cardholder shall be mounted on the
inside of the door.
3)
Locks shall be cylindrical tumbler type with larger enclosures requiring sliding vault
locks with three-point latching. Lock assemblies shall be keyed alike. One key shall
be provided with each lock.
Type 3R, Type 5, and Type 12:
1)
Enclosures shall be constructed in accordance with UL 50 requirements. Enclosures
shall be painted with enamel electrodeposited over cleaned phosphatized steel.
2)
Doors shall be gasketed and shall be equipped with a tumbler type vault lock. A clear
plastic directory cardholder shall be mounted on the inside of door. Lock assemblies
shall be keyed alike. One key shall be provided with each lock.
PART 3
EXECUTION
3.1
EXAMINATION
A.
b)
Verification of Conditions: Examine areas and conditions under which the work is to be installed, and
notify the Contractor in writing, with a copy to the Owner and the Architect, of any conditions detrimental
to the proper and timely completion of the work. Do not proceed with the work until unsatisfactory
Section [26 24 16.11] [16442]
Panelboards
Page 8
03/08/2016
Square DTM by Schneider Electric
conditions have been corrected.
1.
3.2
Beginning of the work shall indicate acceptance of the areas and conditions as satisfactory by the
Installer.
INSTALLATION
A.
Install panelboards in accordance with reviewed product data, final shop drawings, manufacturer’s
written instructions and recommendations, and as indicated on the Drawings.
1.
3.3
Install panelboards in accordance with latest version of NEMA PB 1.1, and UL and NEC
standards.
FIELD QUALITY CONTROL
A.
Inspect complete installation for physical damage, proper alignment, anchorage, and grounding.
B.
Measure steady state load currents at each panelboard feeder. Rearrange circuits in the panelboard to
balance the phase loads within 20 percent of each other. Maintain proper phasing for multi-wire branch
circuits.
C.
Check tightness of bolted connections and circuit breaker connections using calibrated torque wrench
or torque screwdriver per manufacturer's written specifications.
3.4
DEMONSTRATION
A.
3.5
Provide the services of a factory-authorized service representative of the manufacturer to provide startup service and to demonstrate and train the Owner’s personnel.
1.
Test and adjust controls and safeties. Replace damaged or malfunctioning controls and
equipment.
2.
Train the Owner’s maintenance personnel on procedures and schedules related to start-up and
shutdown, troubleshooting, servicing, and preventive maintenance.
3.
Review data in operation and maintenance manuals with the Owner’s personnel.
4.
Schedule training with the Owner, through the Architect, with at least seven day’s advanced
notice.
PROTECTION
A.
Provide final protection and maintain conditions in a manner acceptable to the Installer, that shall
ensure that the panelboards shall be without damage at time of Substantial Completion.
END OF SECTION
Section [26 24 16.11] [16442]
Panelboards
Page 9
03/08/2016
Square DTM by Schneider Electric