WRNS Studio
Project No 12008.00
CSUEB Concord
Organic Chemistry Lab Renovation
4700 Ygnacio Valley Road
Concord, California
SECTION 26 24 16
PANELBOARDS
PART 1 - GENERAL
1.1
SUMMARY
A.
1.2
Work Included: Materials, installation and testing of:
1.
Panelboards
2.
Surge Protective Devices
RELATED SECTIONS
A.
Contents of Division 26, Electrical and Division 01, General Requirements apply to this
Section.
B.
In addition, reference the following:
1.
Section 26 24 13, Switchboards.
1.3
REFERENCES AND STANDARDS
A.
References and Standards as required by Section 26 00 00, Electrical Basic Requirements and
Division 01, General Requirements.
B.
In addition, meet the following:
1.
UL 67, Standards for Panelboards.
1.4
SUBMITTALS
A.
1.5
Submittals as required by Section 26 00 00, Electrical Basic Requirements and Division 01,
General Requirements.
QUALITY ASSURANCE
A.
1.6
Quality assurance as required by Section 26 00 00, Electrical Basic Requirements and Division
01, General Requirements.
WARRANTY
A.
Warranty of materials and workmanship as required by Section 26 00 00, Electrical Basic
Requirements and Division 01, General Requirements.
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October 29, 2012
PANELBOARDS
26 24 16 - 1
WRNS Studio
Project No 12008.00
CSUEB Concord
Organic Chemistry Lab Renovation
4700 Ygnacio Valley Road
Concord, California
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
2.2
Basis of Design: Square D. Manufacturers listed are allowed on condition of meeting specified
conditions including available space for the equipment and Code required working clearances
and selective coordination per Section 26 05 73, Electrical Distribution System Studies.
Remove and replace electrical equipment installed that does not meet these conditions at no
cost to Owner.
PANELBOARDS
A.
Description: Panelboards 400 amps or less. NEMA PB1, Type 1 as indicated on drawings,
circuit breaker type. Maximum enclosure depth: 6-inches for surface mounted, 5 3/4-inches for
flush mounted.
B.
Maximum Width: 20-inches.
C.
Integrated Equipment Rating: Provide fully rated integrated equipment rating greater than the
available fault current. Series rated switchboards are not acceptable. Reference drawings for
available fault current. Final rating based on the protective device study completed under the
provisions of Division 26, Electrical Distribution System Studies.
D.
Panelboard Bus Non-Reduced: Copper, ratings as indicated on drawings. Bus bar with
suitable electroplating (tin) for corrosion control at connection. Provide copper ground bus in
each panelboard.
E.
Lugs: Mechanical type for both aluminum and copper conductors.
F.
Provide double lugs and/or feed-through lugs for feed through feeders.
G.
Molded Case Circuit Breakers: Thermal magnetic trip circuit breakers, bolt-on type, with
common trip handle for poles; UL listed. Predrill bus for bolt-on breakers.
1.
Type SWD for lighting circuits.
2.
Type HACR for air conditioning equipment circuits.
3.
Class A ground fault interrupter circuit breakers where scheduled.
4.
Class B ground fault equipment protection circuit breakers for heat trace and other
circuits as required by Code.
5.
Do not use tandem circuit breakers.
H.
Accessories: Provide where indicated: shunt trip, arc-fault circuit interrupter (AFCI), Class A
ground fault circuit interruper (GFCI), auxiliary switch and alarm switch.
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WRNS Studio
Project No 12008.00
CSUEB Concord
Organic Chemistry Lab Renovation
4700 Ygnacio Valley Road
Concord, California
I.
Cabinet Front: Provide flush or surface mounting as shown on the schedules, drawings, or
otherwise noted. Cabinet front with concealed hinged front cover door-in-door construction,
metal directory frame with heavy clear plastic protector, flush lift latch and lock, two keys per
panel all keyed alike.
J.
Provide boxes with removable blank end walls and interior mounting studs. Provide interior
support bracket for ease of interior installation.
K.
Furnish surface mounted cabinet boxes without knockouts.
1.
Minimum Integrated Short Circuit Rating:
a.
10,000 amperes symmetrical for 240 V panelboards.
b.
14,000 amperes symmetrical for 480 V panelboards.
c.
Minimum rating as indicated on the Drawings or Panel Schedules.
d.
Final rating based on the Protective Device Study completed under the provisions
of Section 26 05 73, Electrical Distribution System Studies.
2.3
SURGE PROTECTIVE DEVICES
A.
See 26 43 00, Surge Protective Devices (SPD).
PART 3 - EXECUTION
3.1
INSTALLATION
A.
Install panelboards in accordance with NEMA PB 1.1, NECA 1 and manufacturers installation
instructions.
B.
Install panelboards level and plumb. Install recessed panelboards flush with wall finishes.
C.
Height: 6-feet 6-inches to top of panelboard; install panelboards taller than 6-feet 6-inches
with bottom no more than 4-inches above floor.
D.
Provide filler plates for unused spaces in panelboards.
E.
Provide typed circuit directory for each branch circuit panelboard. Include all "spaces" and
"spares." Revise directory to reflect circuiting changes and as-installed conditions. Use final
Owner designated room names and numbers, and not designations shown on drawings.
F.
Provide engraved plastic nameplates per Section 26 05 53, Identification for Electrical
Systems.
G.
Provide arc flash labels per Section 26 05 73, Electrical Distribution System Studies.
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PANELBOARDS
26 24 16 - 3
WRNS Studio
Project No 12008.00
CSUEB Concord
Organic Chemistry Lab Renovation
4700 Ygnacio Valley Road
Concord, California
H.
Provide 3 (qty), 1-inch spare conduits out of each recessed panelboard to an accessible location
above ceiling. Identify each as SPARE.
I.
Provide permanent identification number in or on panelboard dead-front adjacent to each
breaker pole position. Horizontal centerline of numbers to correspond with centerline of
circuit breaker pole position.
J.
Ground and bond panelboard enclosure per NEC.
K.
Paint:
1.
Standard factory finish unless noted otherwise.
2.
Panelboards located in finished interior areas in view of building occupants: paint to
match adjacent wall surface. Color and paint preparation as specified by Architect.
Covers to be painted off wall, then installed over dried, painted wall surface.
L.
Provide handle guards on each circuit supplying obviously constant loads such as fire alarm,
security, lighting controls, refrigerators and freezers, fire protection, etc.
M.
Breakers being added to existing panelboards: Coordinate breaker type and short circuit rating
with existing panelboard. Breakers to match existing in manufacturer's type and AIC rating.
Provide new typed circuit directory.
N.
Provide handle tie to branch circuit breakers of multiwire branch circuits for simultaneous
disconnection of circuits. Handle tie will be identified for use with circuit breakers provided.
Reconfigure assigned circuits as necessary so that circuit breakers associate with multiwire
branch circuits are physically adjacent, record changes in panelboard schedules and circuiting
plans for record drawings.
O.
Provide interior wiring diagram, neutral wiring diagram, UL label, and short circuit rating on
interior or in booklet format inserted in sleeve inside panel cover.
P.
Verify available recessing depth and coordinate wall framing with other divisions.
Q.
Maintain fire rating of wall where panels are installed flush in fire rated walls.
3.2
FIELD QUALITY CONTROL
A.
3.3
Perform inspections and tests in accordance with manufacturer's requirements.
ADJUSTING
A.
Measure steady state load currents at each panelboard feeder; rearrange circuits in panelboard
to balance phase loads to within 20 percent of each other. Maintain proper phasing for
multi-wire branch circuits.
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WRNS Studio
Project No 12008.00
3.4
CSUEB Concord
Organic Chemistry Lab Renovation
4700 Ygnacio Valley Road
Concord, California
CLEANING
A.
Thoroughly clean exterior and interior of each panelboard in accordance with manufacturer's
installation instructions.
B.
Vacuum construction dust, dirt, and debris out of each panelboard.
C.
Where enclosure finish is damaged, tough up finish with matching paint in accordance with
manufacturer's specifications and installation instructions.
END OF SECTION
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