SECTION 26 25 01.01
LOW-VOLTAGE BUSWAYS - SCHNEIDER ELECTRIC I-LINE
PART 1 GENERAL
1.1
SECTION INCLUDES
A.
B.
C.
1.2
RELATED REQUIREMENTS
A.
B.
C.
D.
E.
F.
G.
H.
I.
1.3
Section 03 3000 - Cast-in-Place Concrete: Concrete curbs for busway floor penetrations.
Section 07 8400 - Firestopping.
Section 26 0526 - Grounding and Bonding for Electrical Systems.
Section 26 0529 - Hangers and Supports for Electrical Systems.
Section 26 0553 - Identification for Electrical Systems: Identification products and
requirements.
Section 26 0573 - Overcurrent Protective Device Coordination Study.
Section 26 2701 - Electrical Service Entrance.
Section 26 2813 - Fuses.
1.
Includes requirements for spare fuses.
Section 26 4300 - Surge Protective Devices: Requirements for surge protective device plugin units for plug-in busway.
REFERENCE STANDARDS
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
1.4
Feeder busway.
Plug-in busway.
Plug-in units for plug-in busway.
IEC 60529 - Degrees of Protection Provided by Enclosures (IP Code); International
Electrotechnical Commission; 2001-02.
ISO 9001 - Quality Management Systems-Requirements; International Standards
Organization; 2008.
NECA 1 - Standard for Good Workmanship in Electrical Construction; National Electrical
Contractors Association; 2010.
NECA 408 - Standard for Installing and Maintaining Busways; National Electrical Contractors
Association; 2009.
NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum); 2008.
NEMA BU 1.1 - General Instructions for Handling, Installation, Operation, and Maintenance
of Busway Rated 600 Volts or Less; National Electrical Manufacturers Association; 2010.
NEMA KS 1 - Enclosed and Miscellaneous Distribution Equipment Switches (600 Volts
Maximum); National Electrical Manufacturers Association; 2001 (R2006).
NFPA 70 - National Electrical Code; National Fire Protection Association; Most Recent
Edition Adopted by Authority Having Jurisdiction, Including All Applicable Amendments and
Supplements.
UL 489 - Molded-Case Circuit Breakers, Molded-Case Switches and Circuit Breaker
Enclosures; Current Edition, Including All Revisions.
UL 857 - Busways; Current Edition, Including All Revisions.
ADMINISTRATIVE REQUIREMENTS
A.
Coordination:
1.
Coordinate the arrangement of busway with structural members, ductwork, piping,
equipment and other potential conflicts installed under other sections or by others.
Coordinate the work with other trades to avoid installation of obstructions within
busway required clearances.
2.
Coordinate arrangement of busway with the dimensions and clearance requirements
of the actual equipment to be installed.
3.
Coordinate the work with placement of supports, anchors, etc. required for mounting.
26 25 01.01
4.
B.
C.
D.
1.5
Verify with manufacturer that conductor terminations are suitable for use with the
conductors to be installed.
5.
Where busway extends through roof, coordinate the work with other trades to provide
roof penetrations that preserve the integrity of the roofing system and do not void the
roof warranty.
6.
Notify Architect of any conflicts with or deviations from the contract documents. Obtain
direction before proceeding with work.
Preinstallation Meeting: Convene [one week] [__________] prior to performing field
measurements for busway fabrication drawings; require attendance of all affected installers.
Review proposed routing, sequence of installation, and protection requirements for installed
busway.
Utility Interconnection:
1.
See Section [26 2701] [__________] for [Utility Company contact information and]
additional requirements.
2.
Preinstallation Meeting: Convene [one week] [__________] prior to performing field
measurements for busway fabrication drawings to review interconnection
requirements and details with Utility Company representative.
3.
Coordinate with Utility Company to provide busway connections suitable for system
requirements.
4.
Arrange for inspections and secure permits necessary to obtain Utility Company
approval of system.
Sequencing:
1.
Perform field measurements prior to busway fabrication. Where necessary, perform
field measurement for custom lengths after installation of adjacent sections.
SUBMITTALS
A.
B.
C.
D.
E.
F.
G.
H.
I.
See Section 01 3000 - Administrative Requirements, for submittal procedures.
Product Data: Provide manufacturer's standard catalog pages and data sheets for busway
system components and accessories. Include dimensions, weight, materials, fabrication
details, finishes, and service condition requirements.
1.
Include [busway resistance, reactance, and impedance data] [voltage drop
ratings] and [__________].
2.
Include characteristic trip curves for each type and rating of circuit breaker plug-in
device [upon request] [where indicated] [_________].
Shop Drawings: Include dimensioned plan views and sections indicating proposed busway
routing, required clearances, and locations and details of supports, fittings, building element
penetrations, and equipment connections. Indicate voltage and current ratings, short circuit
current ratings, configurations, and installed features and accessories.
1.
Clearly indicate whether proposed short circuit current ratings are fully rated or, where
acceptable, series rated systems.
2.
Include documentation of listed series ratings [upon request].
Where roof penetrations are provided, certify that work does not void roof warranty.
Field Quality Control Test Reports.
Manufacturer's Installation Instructions: Indicate application conditions and limitations of use
stipulated by product testing agency. Include instructions for storage, handling, protection,
examination, preparation, and installation of product.
Project Record Documents: Record actual routing of busway.
1.
Include actual installed locations of plug-in units.
Maintenance Data: Include information on replacement parts and recommended
maintenance procedures and intervals.
Maintenance Materials: Furnish the following for Owner's use in maintenance of project.
1.
See Section 01 6000 - Product Requirements, for additional provisions.
2.
See Section 26 2813 for requirements for spare fuses and spare fuse cabinets.
3.
Hook Stick(s) for Plug-In Units: [One] [One for each _____ feet (_____ m) of installed
plug-in busway] [_________], with length as required for suitable operation of plug-in
unit handle from floor or working platform.
26 25 01.01
4.
1.6
QUALITY ASSURANCE
A.
B.
C.
D.
E.
1.7
Conform to requirements of NFPA 70.
Maintain at the project site a copy of each referenced document that prescribes execution
requirements.
Manufacturer Qualifications: Company specializing in manufacturing the products specified
in this section with minimum five] [_______] years documented experience.
Installer Qualifications: Company [specializing in performing the work of this section]
[__________] with minimum [five] [_________] years [documented] [__________]
experience with busway systems of similar size, type, and complexity.
Products:
1.
Listed and classified by [Underwriters Laboratories Inc.] or [testing firm acceptable to
authorities having jurisdiction] as suitable for the purpose specified and indicated.
2.
Manufactured in a facility certified as complying with ISO 9001.
DELIVERY, STORAGE, AND HANDLING
A.
B.
C.
1.8
Extra Plug-In Unit(s): [__________].
Receive, inspect, handle, and store busway in accordance with manufacturer's instructions,
NECA 408, and NEMA BU1.1.
Store products indoors in a clean, dry space having a uniform temperature to prevent
condensation (including outdoor busway, which is not weatherproof until completely and
properly installed). Maintain factory wrapping or provide an additional heavy canvas or heavy
plastic cover to protect units from dirt, water, construction debris, and traffic.
Handle products carefully to avoid damage to internal components, enclosure, and finish.
FIELD CONDITIONS
A.
Maintain field conditions within required service conditions during and after installation.
PART 2 PRODUCTS
2.1
MANUFACTURERS
A.
B.
C.
D.
E.
2.2
Basis of Design: Schneider Electric; Square D Products [I-Line/I-Line II Busway]:
www.schneider-electric.us.
Other Acceptable Manufacturers:
1.
[__________].
2.
[__________].
Substitutions: [See Section 01 6000 - Product Requirements] [Not permitted]
[__________].
Products other than basis of design are subject to compliance with specified requirements
[and prior approval of Engineer]. By using products other than basis of design, Contractor
accepts responsibility for costs associated with any necessary modifications to related work,
including any design fees.
Source Limitations: Furnish busway system and associated components and accessories
produced by [the same manufacturer as the other electrical distribution equipment
used for this project] [a single manufacturer] [the same manufacturer as the existing
busway system] [__________] and obtained from a single supplier.
BUSWAY SYSTEM
A.
B.
C.
Provide [new] [modifications and additions to existing] busway system consisting of all
required components, fittings, devices, supports, accessories, etc. as necessary for a
complete operating system.
Description: Prefabricated sectionalized enclosed bus assemblies and associated fittings
and devices; listed and labeled as complying with UL 857.
Busway General Requirements:
26 25 01.01
1.
Busway Type: Totally enclosed, non-ventilated; suitable for installation in any
mounting orientation the busway is designed for (e.g. horizontal flatwise, horizontal
edgewise, vertical) without derating.
2.
Temperature Rise: Not exceeding 55 degrees C, when operating at continuous rated
current in an ambient temperature of 104 degrees F (40 degrees C).
3.
Bus bars and stabs to be suitably plated at all electrical contact points.
4.
Both feeder and plug-in busway rated 800 A and above to be of sandwich type
construction, with no air gaps between bus bars except at plug-in openings.
5.
Bus bar Insulation: NEMA Class B, rated 266 degrees F (130 degrees C); vendor
certified polyester film or epoxy powder coated materials.
6.
Housing: Constructed with code gage steel and aluminum to reduce hysteresis and
eddy current losses, with suitable protective finish of ANSI 49 gray polyester paint.
7.
Joints: Single-bolt type, with high strength steel bolts and conical washers to maintain
proper pressure over a large contact surface area:
a.
Use torque-indicating bolts with visual indication that proper torque has been
applied; requires only a standard long handle wrench for proper activation.
b.
Bolts to be at ground potential to allow adjustment without requiring deenergizing of busway.
c.
Designed such that tightening of joints only requires access to one side of
busway.
d.
Allows for length adjustment of plus/minus 0.125 inch (3.2 mm).
e.
For busway rated 800 A and above, joint connection assemblies to be
removable to allow electrical isolation or physical removal of a busway length
without disturbing adjacent busway lengths.
8.
Voltage Drop:
a.
Voltage drop specified is based on the busway operating at full rated current
and at stabilized operating temperature in 86 degrees F (30 degrees C)
ambient.
b.
Do not exceed 3.1 volts per 100 feet (30.48 m) for three phase, line-to-line
voltage drop at 40 percent power factor concentrated load.
c.
Do not exceed 4.0 volts per 100 feet (30.48 m) for line-to-line voltage drop at
the load power factor that produces maximum voltage drop in the busway.
D.
Service Conditions:
1.
Provide busway system and associated components suitable for operation under the
following service conditions without derating:
a.
Altitude: Less than 6,600 feet (2,000 m).
b.
Ambient Temperature:
1)
Busway Lengths and Fittings: Between -22 degrees F (-30 degrees C)
and 104 degrees F (40 degrees C).
2)
Circuit Breaker Plug-In Units: Between 32 degrees F (0 degrees C) and
104 degrees F (40 degrees C).
3)
Fusible Switch Plug-In Units: Between -22 degrees F (-30 degrees C)
and 104 degrees F (40 degrees C).
2.
Provide busway system and associated components suitable for operation at
indicated ratings under the service conditions at the installed location.
a.
Altitude: [ _____ feet (_____ m)].
b.
Ambient Temperature: Between [ _____ degrees F (_____ degrees C)] and [
_____ degrees F (_____ degrees C)].
c.
[__________].
E.
Short Circuit Current Rating:
--CHOOSE ONE OF THE TWO PARAGRAPHS BELOW-1.
Provide busway system and associated components with listed short circuit current
rating [not less than the available fault current at the installed location as
indicated on the drawings] [not less than ____ rms symmetrical amperes] [as
indicated on the drawings] [__________].
26 25 01.01
2.
3.
4.
2.3
Provide busway system and associated components with listed short circuit current
rating not less than the available fault current at the installed location as determined
by short circuit study [performed in accordance with Section 26 0573]
[__________].
Listed series ratings are [acceptable, except where not permitted by motor
contribution according to NFPA 70] [acceptable only where specifically indicated]
[not acceptable] [__________].
Label equipment utilizing series ratings as required by NFPA 70.
FEEDER BUSWAY
A.
General Requirements:
1.
Outdoor Feeder Busway: Weatherproof, NEMA 250 Type 3R, with sealed joint covers
and drain holes with removable plugs.
a.
Approved for hanger spacing of up to 5 feet (1524 mm) for horizontally
mounted runs and up to 10 feet (3048 mm) for vertically mounted runs.
2.
Indoor Feeder Busway: [Standard NEMA 250 Type 1] [Splash resistant, with
minimum IEC 60529 rating of IP 54] [__________].
a.
Approved for hanger spacing of up to 10 feet (3048 mm) for horizontally
mounted runs and up to 16 feet (4877 mm) for vertically mounted runs.
--------------------------------------------------------------------------------------------------B.
Feeder Busway [Type _____ ] - Basis of Design: Schneider Electric; Square D Products; ILine II Feeder Busway; www.schneider-electric.us.
1.
Voltage: [600Y/347 V 3PH, 4W] [480Y/277 V 3PH, 4W] [208Y/120 V 3PH, 4W] [600 V
3PH, 3W] [480 V 3PH, 3W] [240 V 3PH, 3W] [As indicated on the drawings]
[__________].
2.
Ampere Rating: [As indicated on the drawings] [800 A] [1000 A] [1200 A] [1350 A]
[1600 A] [2000 A] [2500 A] [3000 A] [3200 A (copper only)] [4000 A] [5000 A (copper
only)] [________].
3.
Configuration:
a.
3 phase, 3-wire (without neutral), with 50 percent capacity integral housing
ground.
b.
3 phase, 3-wire (without neutral), with 100 percent capacity isolated ground and
50 percent capacity integral housing ground.
c.
3 phase, 4-wire (100 percent capacity neutral), with 50 percent capacity integral
housing ground.
d.
As indicated on the drawings.
4.
Bus Bar Material:
a.
Copper.
b.
Aluminum.
c.
Copper or aluminum.
--------------------------------------------------------------------------------------------------2.4
PLUG-IN BUSWAY
A.
General Requirements:
1.
Provide hinged cover for each plug-in opening.
2.
All plug-in openings to be usable simultaneously.
3.
Each phase position of a plug-in opening to be individually insulated.
4.
Plug-in opening and bus bars capable of being inspected prior to the installation of the
plug-in unit.
5.
Provide means for mechanical support and alignment of plug-in units.
6.
Protection Rating: [Standard NEMA 250 Type 1] [Splash resistant, with minimum IEC
60529 rating of IP 54] [__________].
7.
Approved for hanger spacing of up to 10 feet (3048 mm) for horizontally mounted runs
and up to 16 feet (4877 mm) for vertically mounted runs.
---------------------------------------------------------------------------------------------------
26 25 01.01
B.
Plug-In Busway [Type _____ ] - Basis of Design: Schneider Electric; Square D Products; ILine/I-Line II Plug-In Busway; www.schneider-electric.us.
1.
Voltage: 600Y/347 V 3PH, 4W] [480Y/277 V 3PH, 4W] [208Y/120 V 3PH, 4W] [600 V
3PH, 3W] [480 V 3PH, 3W] [240 V 3PH, 3W] [As indicated on the drawings]
[_________].
2.
Ampere Rating: [As indicated on the drawings] [225 A] [400 A] [600 A] [800 A]
[1000 A] [1200 A] [1350 A] [1600 A] [2000 A] [2500 A] [3000 A] [3200 A (copper only)]
[4000 A] [ 5000 A (copper only)] [_________].
3.
Configuration:
a.
3 phase, 3-wire (without neutral), with 50 percent capacity integral housing
ground.
b.
3 phase, 3-wire (without neutral), with 100 percent capacity isolated ground and
50 percent capacity integral housing ground.
c.
3 phase, 4-wire (100 percent capacity neutral), with 50 percent capacity integral
housing ground.
d.
As indicated on the drawings.
4.
Bus Bar Material:
a.
Copper.
b.
Aluminum.
c.
Copper or aluminum.
5.
Plug-In Opening Spacing: 24 inches (610 mm) nominal between openings; 10
openings (5 per side) for standard straight lengths of 10 feet (3 m).
--------------------------------------------------------------------------------------------------C.
Plug-In Busway [Type _____ ] - Basis of Design: Schneider Electric; Square D Products; ILine II Riser Plug-In Busway; www.schneider-electric.us.
1.
Voltage: 600Y/347 V 3PH, 4W] [480Y/277 V 3PH, 4W] [208Y/120 V 3PH, 4W] [600 V
3PH, 3W] [480 V 3PH, 3W] [240 V 3PH, 3W] [As indicated on the drawings]
[__________].
2.
Ampere Rating: [As indicated on the drawings] [800 A] [1000 A] [1200 A] [1350 A]
[1600 A] [2000 A] [2500 A] [3000 A] [3200 A (copper only)] [4000 A] [5000 A (copper
only)] [________].
3.
Configuration:
a.
3 phase, 3-wire (without neutral), with 50 percent capacity integral housing
ground.
b.
3 phase, 3-wire (without neutral), with 100 percent capacity isolated ground and
50 percent capacity integral housing ground.
c.
3 phase, 4-wire (100 percent capacity neutral), with 50 percent capacity integral
housing ground.
d.
As indicated on the drawings.
Bus Bar Material:
a.
Copper.
b.
Aluminum.
c.
Copper or aluminum.
5.
Plug-In Opening Spacing: 24 inches (610 mm) nominal between openings; 5 openings
(on one side only) for standard straight lengths of 10 feet (3 m); designed for use as
vertical riser.
--------------------------------------------------------------------------------------------------4.
2.5
PLUG-IN UNITS FOR PLUG-IN BUSWAY
A.
B.
Description: Plug-in units suitable for use with installed busway; types, ratings,
configurations, and features as indicated [on the drawings] [__________].
General Requirements:
1.
Designed to make positive ground connection prior to phase/neutral connections
when installed.
26 25 01.01
2.
C.
Designed so that ground method is not defeated by future painting of the busway
housing.
3.
Equipped with internal barriers to prevent accidental contact of fish tape and
conductors with live parts on the line side of the protective device during wire pulling.
4.
Where splash resistant busway is specified, provide splash resistant plug-in units
[with minimum IEC 60529 rating of IP 54] [with minimum IEC 60529 rating of _____
] [__________] unless otherwise indicated.
Circuit Breaker Plug-In Units:
1.
Provide hook stick operable handle with means for locking in the OFF position.
Handle to always remain in control of the switching mechanism.
2.
Provide safety interlock to prevent opening the cover with the unit in the ON position
with capability of overriding interlock for testing purposes.
3.
Provide mechanical interlock for plug-in units up to 250 A to prevent installation or
removal with the unit in the ON position.
4.
Conductor Terminations: Suitable for use with the conductors to be installed.
5.
Provide insulated, groundable 100 percent capacity solid neutral assembly [where a
neutral connection is required] [where indicated] [__________], with a suitable lug
for terminating each neutral conductor.
6.
Provide solidly bonded equipment ground bus with suitable lug for terminating
equipment grounding conductor.
7.
Provide thermal magnetic circuit breakers [unless otherwise indicated] [for circuit
breaker frame sizes less than _____ amperes] [__________].
8.
Provide electronic trip circuit breakers [where indicated] [for circuit breaker frame
sizes _____ amperes and above] [__________].
9.
Provide current limiting circuit breakers [where indicated] [where required]
[_________].
10.
Molded Case Circuit Breakers:
a.
Description: Quick-make, quick-break, over center toggle, trip-free, tripindicating circuit breakers listed and labeled as complying with UL 489.
b.
Interrupting Capacity:
1)
Provide circuit breakers with interrupting capacity as required to provide
the short circuit current rating [indicated, but not less than:] [indicated.]
[__________]
(a)
[10,000] [ __________] rms symmetrical amperes at 240 VAC or
208 VAC.
(b)
[14,000] [__________] rms symmetrical amperes at 480 VAC.
2)
Fully Rated Systems: Provide circuit breakers with interrupting capacity
not less than the short circuit current rating indicated.
3)
Series Rated Systems: Provide circuit breakers listed in combination with
upstream devices to provide interrupting rating not less than the short
circuit current rating indicated.
c.
Conductor Terminations:
1)
Provide mechanical lugs [unless otherwise indicated] [for circuit
breaker frame sizes less than _____ amperes] [__________].
2)
Provide compression lugs [where indicated] [for circuit breaker frame
sizes _____ amperes and above] [__________].
3)
Lug Material: [Aluminum, suitable for terminating aluminum or
copper conductors] [Copper, suitable for terminating copper
conductors only] [_________].
d.
Thermal Magnetic Circuit Breakers: For each pole, furnish thermal inverse time
tripping element for overload protection and magnetic instantaneous tripping
element for short circuit protection.
1)
Provide field-adjustable magnetic instantaneous trip setting for circuit
breaker frame sizes [150] [_____] amperes and larger.
2)
Provide interchangeable trip units [where indicated] [for circuit breaker
frame sizes _____ amperes and larger] [__________].
26 25 01.01
e.
D.
E.
Electronic Trip Circuit Breakers: Furnish solid state, microprocessor-based, true
rms sensing trip units.
1)
Provide the following field-adjustable trip response settings:
(a)
Long time pickup, adjustable [by replacing interchangeable trip
unit] [by setting dial] or [__________].
(b)
Long time delay.
(c)
Short time pickup and delay.
(d)
Instantaneous pickup.
(e)
Ground fault pickup and delay [where ground fault protection is
indicated] [__________].
2)
Provide communication capability [where indicated] [__________]:
Compatible with [system indicated] [__________].
f.
Current Limiting Circuit Breakers: Without using fusible elements, designed to
limit the let-through energy to a value less than the energy of a one-half cycle
wave of the symmetrical prospective current when operating within its current
limiting range.
g.
Selectivity: Where the requirement for selectivity is indicated, furnish products
as required to achieve selective coordination.
Fusible Switch Plug-In Units:
1.
Description: Quick-make, quick-break enclosed switch complying with NEMA KS 1
where applicable.
2.
Provide hook stick operable handle with means for locking in the OFF position.
Handle to always remain in control of the switching mechanism.
3.
Provide safety interlock to prevent opening the cover with the unit in the ON position
with capability of overriding interlock for testing purposes.
4.
Provide mechanical interlock for plug-in units up to 250 A to prevent installation or
removal with the unit in the ON position.
5.
Horsepower Rating: Suitable for connected load.
6.
Minimum Short Circuit Ratings:
a.
Switches Protected by [Class H] or [__________] Fuses: [10,000]
[__________] rms symmetrical amperes.
b.
Switches Protected by [Class R] [Class J] [Class T] or [__________] Fuses:
[100,000] [__________] rms symmetrical amperes.
7.
Provide with switch blade contact position that is visible when the cover is open.
8.
Fuse Clips: As required to accept fuses indicated.
a.
Where NEMA Class R fuses are installed, provide rejection feature to prevent
installation of fuses other than Class R.
9.
Conductor Terminations: Suitable for use with the conductors to be installed.
10.
Provide insulated, groundable 100 percent capacity solid neutral assembly [where a
neutral connection is required] [where indicated] [__________], with a suitable lug
for terminating each neutral conductor.
11.
Provide solidly bonded equipment ground bus with suitable lug for terminating
equipment grounding conductor.
12.
Conductor Terminations:
a.
Provide mechanical lugs [unless otherwise indicated] [for switch ratings less
than _____ amperes] [__________].
b.
Provide compression lugs [where indicated] [for switch ratings _____ amperes
and above] [__________].
c.
Lug Material: [Aluminum, suitable for terminating aluminum or copper
conductors] [Copper, suitable for terminating copper conductors only]
[_________].
Surge Protective Device Plug-In Units:
1.
Comply with Section 26 4313.
2.
List and label unit as a complete assembly including surge protective device.
PART 3 EXECUTION
26 25 01.01
3.1
EXAMINATION
A.
B.
C.
D.
3.2
PREPARATION
A.
3.3
Verify that field measurements are as shown on drawings.
Verify that the ratings of busway system components are consistent with the indicated
requirements.
Verify that mounting surfaces are ready to receive busway and associated supports.
Verify that conditions are satisfactory for installation prior to starting work.
Perform insulation resistance testing on individual current-carrying busway system
components prior to installation in accordance with NECA 408 and NEMA BU1.1.
INSTALLATION
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
Install products in accordance with manufacturer's instructions.
Install busway in accordance with NECA 1 (general workmanship), NECA 408, and NEMA
BU1.1.
Unless otherwise indicated, arrange busway to be parallel or perpendicular to building lines.
Arrange busway to provide required clearances and maintenance access.
Install busway plumb and level, with sections aligned and with horizontal runs at the proper
elevation.
Unless otherwise indicated, orient horizontal plug-in busway with plug-in openings on sides
to permit practical use of all plug-in openings.
Maintain proper phase sequence throughout busway system, accounting for phase
transitions where applicable.
Provide suitable expansion fittings where busway is subject to movement, including but not
limited to:
1.
Where busway crosses structural joints intended for expansion.
2.
Long straight busway runs in accordance with manufacturer's instructions.
Provide end closures at unconnected ends of busway runs.
Busway Support:
1.
Use manufacturer's recommended hangers and supports, located at intervals
complying with NFPA 70 and manufacturer's requirements. Provide required support
and attachment components [in accordance with Section 26 0529] [_________],
where not furnished by busway manufacturer.
2.
Use suitable spring hangers for vertical riser applications where busway penetrates
and is supported by building floors.
3.
Provide independent support from building structure. Do not provide support from
piping, ductwork, or other systems.
4.
Provide sway bracing as indicated or as required to keep busway runs straight and
prevent rotation and movement, accounting for unbalanced weight distribution of plugin units where applicable.
Penetrations:
1.
Provide suitable flanges where busway penetrates building elements. Use
weatherproof flanges for exterior wall or roof penetrations. Seal roof penetrations as
indicated or as required to preserve integrity of roofing system and maintain roof
warranty.
2.
Install firestopping to preserve fire resistance rating of building elements, using
materials and methods specified [in Section 07 8400] [in Section __________ ]
[__________].
3.
Where busway penetrates floor, provide [4 inch (100 mm)] [__________] high
concrete curb [constructed in accordance with Section 03 3000] [constructed in
accordance with Section _________ ] [__________] around openings in accordance
with NFPA 70.
Outdoor Feeder Busway: Arrange busway to prevent water infiltration through drain holes
from rain or snow. Seal joints in accordance with manufacturers instructions and remove
drain hole plugs.
26 25 01.01
M.
Plug-In Units:
1.
Install plug-in units on plug-in busway in accordance with manufacturer's instructions.
Provide independent supports where recommended by manufacturer.
2.
Provide fuses [complying with Section 26 2813] [__________] for fusible switch
plug-in units as indicated or as required by equipment manufacturer's
recommendations.
--CHOOSE ONLY ONE OF THE TWO PARAGRAPHS BELOW WHERE APPLICABLE-3.
Set field-adjustable tripping function settings for circuit breaker plug-in units [as
indicated] [as directed] [__________].
4.
Set field-adjustable circuit breaker tripping function settings as determined by
overcurrent protective device coordination study [performed in accordance with
Section 26 0573] [__________].
5.
Unless otherwise indicated, final connections from plug-in units to loads to be
provided by [Contractor] [Owner] [_________].
N.
Provide grounding and bonding [in accordance with Section 26 0526] [in accordance with
Section __________ ] [__________].
1.
Where integral housing ground is utilized, verify joint covers and other components
required for continuity are properly installed.
O.
Identify busway [in accordance with Section 26 0553] [in accordance with Section
__________ ] [__________].
3.4
FIELD QUALITY CONTROL
A.
B.
C.
D.
E.
3.5
ADJUSTING
A.
B.
3.6
Adjust tightness of mechanical and electrical connections to manufacturer's recommended
torque settings.
Adjust supports as required to minimize strain on busway and associated components.
CLEANING
A.
3.7
See Section 01 4000 - Quality Requirements, for additional requirements.
Provide services of a manufacturer's authorized representative to [observe installation and
assist in inspection and testing] [perform inspection and testing] [__________]. Include
manufacturer's reports with submittals.
Electrically isolate busway system before energizing and perform insulation resistance
testing in accordance with NECA 408 and NEMA BU1.1.
1.
Disconnect surge protective devices (SPDs) prior to performing any high potential
testing. Replace SPDs damaged by performing high potential testing with SPDs
connected.
Perform infrared scanning of energized busway system under maximum load conditions in
accordance with NECA 408.
Correct deficiencies and replace damaged or defective busway system components.
Clean dirt and debris from busway enclosure and components in accordance with
manufacturer's instructions. Do not use compressed air or a blower in order to prevent
debris infiltration. Clean exposed surfaces to remove dirt, paint, or other foreign material and
restore to match original factory finish.
CLOSEOUT ACTIVITIES
A.
B.
C.
See Section 01780 - Closeout Submittals, for closeout submittals.
See Section 01820 - Demonstration and Training, for additional requirements.
Training: Train Owner's personnel on operation, adjustment, and maintenance of system.
1.
Use operation and maintenance manual as training reference, supplemented with
additional training materials as required.
2.
Provide minimum of [four hours] [one day] [_____] of training.
3.
Instructor: [Manufacturer's authorized representative] [Qualified contractor familiar
with the project and with sufficient knowledge of the installed system] [__________].
4.
Location: [At project site] [__________].
26 25 01.01
3.8
PROTECTION
A.
Protect busway system from subsequent construction operations.
END OF SECTION
26 25 01.01