Specification Number: 26 24 16.70
Product Name: MODULAR PANELBOARD SYSEMS
SECTION 26 24 16.70
MODULAR PANELBOARD SYSTEMS
PART 1 GENERAL
1.01 SECTION INCLUDES
A. Modular Panelboard Systems - Furnish and install the integrated solution as specified herein
and where shown on the associated [schedules] [drawings].
1. The lineup shall include:
a. Power panel interiors
b. Lightning and Appliance panel interiors
c. Lighting control
d. Integrated transformers
e. TVSS devices
1.02 REFERENCES
A. The panelboard(s) and circuit breaker(s) referenced herein are designed and manufactured
according to the latest revision of the following specifications.
1. NEMA PB 1 – Panelboards
2. NEMA PB 1.1 - Instructions for Safe Installation, Operation and Maintenance of
Panelboards Rated 600 Volts or less.
3. NEMA AB 1 - Molded Case Circuit Breakers
4. UL 50 - Enclosures for Electrical Equipment
5. UL 67 – Panelboards
6. UL 489 - Molded-Case Circuit Breakers and Circuit Breaker Enclosures
7. Federal Specification W-P-115C - Type I Class 1
8. Federal Specification W-C-375B/Gen - Circuit Breakers, Molded Case, Branch Circuit
and Service.
9. NFPA 70 - National Electrical Code (NEC)
10. ASTM - American Society of Testing Materials
11. IBC – International Building Code – Seismic compliance requirements
12. NFPA 5000 – NFPA Building Code – Seismic compliance requirements
13. ASCE 7 – American Society of Civil Engineers, Minimum Design Loads for Buildings
and Other Structures – Seismic compliance requirements
14. ICC ES AC156 – International Code Council Evaluation Services Acceptance Criteria for
Seismic Qualification by Shake-Table Testing of Nonstructural Components and Systems
– seismic testing protocol
1.03 SUBMITTAL AND RECORD DOCUMENTATION
A. Approval documents shall include drawings. Drawings shall contain overall panelboard
dimensions. The location of the main, branches, and solid neutral shall be clearly shown. In
addition, the drawing shall illustrate one line diagrams with applicable voltage systems.
1.04 QUALIFICATIONS
A. Company specializing in manufacturing of panelboard products with a minimum of twentyfive (25) years documented experience.
B. Panelboards shall be manufactured in accordance with standards listed Article 1.02 REFERENCES.
C. The company that assembles and provides the integrated equipment enclosure(s) shall be the
same company that manufactures the panelboards, circuit breakers and dry type transformers.
1.05 DELIVERY, STORAGE, AND HANDLING
A. Inspect and report concealed damage to carrier within their required time period.
B. Handle carefully to avoid damage to panelboard internal components, enclosure, and finish.
C. Store in a clean, dry environment. Maintain factory packaging and, if required, provide an
additional heavy canvas or heavy plastic cover to protect enclosure(s) from dirt, water,
construction debris, and traffic.
1.06 OPERATIONS AND MAINTENANCE MATERIALS
A. Manufacturer shall provide installation instructions and NEMA Standards Publication PB 1.1
- Instructions for Safe Installation, Operation and Maintenance of Panelboards Rated 600
Volts or less.
1.07 WARRANTY
A. Manufacturer shall warrant specified equipment free from defects in materials and
workmanship for the lesser of one (1) year from the date of installation or eighteen (18)
months from the date of purchase.
PART 2 PRODUCTS
2.01 MANUFACTURERS
A. Shall be Square D
B. __________
C. ______________
D. Substitutions must be submitted in writing three (3) weeks prior to original bid date with
supporting documentation demonstrating that the alternate manufacturer meets all aspects of
the specification herein.
2.02 RATINGS
A. The MPS assembly shall be rated to withstand mechanical forces exerted during short circuit
conditions when connected to a power source having an available fault current of [22,000],
[25,000], [42,000], [65,000] amperes symmetrical at rated voltage as shown on the drawing.
B. Voltage ratings to be as indicated on the drawings.
C. The short circuit current rating of any section shall be limited to the lowest UL listed short
circuit rating or series connected rating of any device installed in the section.
D. The equipment shall be suitable for and certified to meet applicable seismic requirements of
the International Building Code (IBC), 2003 ICC Edition and ASCE 7-02, or later, for the
site-specific location. Guidelines for the installation shall be provided by the equipment
manufacture and based on testing of representative equipment. Equipment capacity shall be
determined from tri-axial seismic shake table results as defined in ICC ES AC 156.
2.03 ENCLOSURES
A. Each lineup shall consist of the required number of vertical sections bolted together to form a
rigid assembly.
B. All sections of the lineup shall be rear aligned with the depth as shown on the drawings and
shall be front-accessible.
C. NEMA Type 1 enclosures shall be constructed in accordance with UL 50 requirements.
Galvannealed steel will not be acceptable.
D. Enclosure Depths
1. NEMA Type 1 panel, contactor, and equipment space sections shall be 10”deep
maximum.
2. NEMA Type 1 Transformer Assembly sections shall be 24” or 36” deep depending on
the size, type and rating of the transformer(s).
E. Enclosure Height
1. All panel, contactor and equipment space sections shall be 86” high maximum.
2. Transformer Assembly sections shall be 91.5”high maximum as standard.
F. Single section-shipping splits shall not exceed 44 in. (1117 mm) in width to facilitate handling
manually.
G. Multiple section shipping splits shall not exceed 86 in. (2183 mm) in width to facilitate
handling with a forklift.
2.04 FRONTS
A. Trim front shall meet strength and rigidity requirements of applicable UL 50 standards.
B. Front shall have ANSI 49 gray enamel electrodeposited over cleaned phosphatized steel.
C. Trim fronts shall be [surface] [surface with door], the door shall have rounded corners and
edges free of burrs.
D. A clear plastic directory cardholder shall be mounted on the inside of the door.
E. Locks shall be cylindrical tumbler type and shall be keyed alike.
F. Two (2) keys shall be provided with each lock.
G. Equipment space shall have a piano hinged front and mounted with trim screws. The door
shall be retained with screws to discourage unauthorized access.
2.05 WIRING/TERMINATION
A. Factory installed type THHN power cables shall electrically connect the power panel
interiors, lighting and appliance panel interiors and transformers in the lineup.
B. All control wire shall be type [MTW], [SIS] bundled and secured with nylon ties.
C. [Wire markers shall be provided at each end of the control wiring for lighting contactors
(lineside wiring only)] or [Terminal blocks shall be clearly labeled in lieu of wire markers for
lighting contactors (line and load side wiring)].
D. When shipping splits are required, power and control cables shall be cut to length, stripped,
labeled and rolled back in one of the adjacent enclosures.
2.06 PANEL INTERIORS
A. Panel interiors shall be flush mounted with the front of the enclosure to allow easy access to
line and/or load conductor’s entering/exiting top or bottom. Recessing the panel interior more
than 3 inches from the front of the enclosure will not be acceptable.
B. Each panel interior shall be compartmentalized with steel walls on all four sides; barriers
between interiors are not acceptable.
C. Panel main breakers shall be integral to the panel interior. Main breakers separate from the
interior will not be acceptable
D. Power panel interiors shall be I-LINE circuit breaker type rated 600 Vac maximum – Refer to
product specification 16440-3.3 to obtain interior and circuit breaker specifications.
E. Lighting and Appliance panel interiors shall be NQ circuit breaker type rated 240 Vac
maximum - Refer to product specification 16440-3.2 to obtain interior and circuit breaker
specifications.
F. Lighting and Appliance panel interiors shall be NF circuit breaker type rated 480Y/277 Vac
maximum - Refer to product specification 16440-3.1 to obtain interior and circuit breaker
specifications.
G. Lighting Control System shall be NF POWERLINK G3 circuit breaker type rated 480Y/277
Vac and 240 Vac maximum respectively - Refer to product specification 16440-4 to obtain
interior and circuit breaker specifications.
2.07 [LIGHTING CONTROLS]
A. [PowerLink NF G3 lighting control systems]
1. The Lighting control system shall consist of microprocessor-based control electronics
with remotely operated circuit breakers mounted in a UL 67 listed lighting panel interior.
2. Each master control panel shall control 168 branch circuits in a master/slave
configuration and accept remote commands through the facilities Ethernet infrastructure.
3. Master panels shall contain both a power supply module and controller in the indicated
spaces.
4. Each lighting control panel shall contain the necessary busses and network hardware to
allow connection of the sub-net wiring between panels.
B. [Lighting contactors]
1. Lighting contactors shall be pan mounted as indicated on the associated [schedules]
[drawings].
2. [Branch breakers shall be factory wired to the line side of the contactors]or [Branch
breakers shall be factory wired to the line side of the contactors, the load side of the
contactors shall be factory wired to terminal blocks.]
3. Lighting contactors shall be Square D Class [8903 type L], [8903 type SM], [8910 type
DP] electrically held, [8903 type LX] or [8903 type SM] mechanically held.
2.08 [TVSS DEVICES]
A. Integrated surge protective devices (SPD) shall be Listed and Component Recognized in
accordance with UL 1449 Second Edition to include Section 37.3 highest fault current
category. SPD shall be UL 1283 listed.
B. Each mode including N-G shall be fused with a 200kA UL recognized surge rated fuse and
incorporate a thermal cutout device. TVSS shall safely reach an end of life condition when
C.
D.
E.
F.
G.
H.
subjected to fault current levels between 0 and 200kA, including low level fault current from
5 to 5000 amperes.
TVSS devices in the NQ, and NF lighting and appliance panel interiors shall be bus
connected or branch breaker connected.
TVSS devices in I-LINE power panel interiors shall be [bus mounted and bus connected to
bus mounted breakers] or [branch breaker connected].
Audible diagnostic monitoring shall be by way of audible alarm. The alarm shall activate
upon a fault condition. An alarm on/off switch shall be provided to silence the alarm. An
alarm push to test switch shall be provided. Dry contacts shall provide strike indication as
standard. Strike counter and remote strike monitoring shall be provide as an option when
shown on the drawings
See the associated [schedules], drawings for TVSS surge current ratings.
TVSS devices shall be free from defects in material and workmanship for a period of ten (10)
years from the date of invoice by the manufacture or its authorized sales channel.
TVSS devices shall be Square D Model IMA for service entrance, power distribution, and
lighting and appliance panelboard applications. - Refer to product specification 164280-1.2
for in depth TVSS specifications.
2.09 [INTEGRATED TRANSFORMERS]
A. Shall be Square D [General Purpose] [Energy Efficient] [Non-Linear] dry type lighting
transformers.
B. Transformer coils shall be [aluminum] [copper] wound construction and shall be impregnated
with nonhygroscopic thermosetting varnish.
C. Transformers shall have [no shield] [electrostatic shield]
D. Transformer(s) shall be factory installed in a common freestanding enclosure as shown on the
associated drawings.
E. Transformers shall be Square D type with the kVA rating as specified on the drawings. Refer to product specification 16460-1 to obtain general lighting and distribution transformer
specifications.
F. Fan cooled transformers will not be allowed.
PART 3 EXECUTION
3.01 INSTALLATION
A. Install panelboards in accordance with manufacturer's written instructions, NEMA PB 1.1 and
NEC standards.
3.02 FIELD QUALITY CONTROL
A. Inspect complete installation for physical damage, proper alignment, anchorage, and
grounding.
B. Check tightness of bolted connections and circuit breaker connections using calibrated torque
wrench or torque screwdriver per manufacturer's written specifications.
END OF SECTION