BUSWAYS
PART 1-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of Contract apply to this Section.
B. Requirements of the following Division 16 Sections apply to this section:
1. "Basic Electrical Requirements”.
1.02 SUMMARY
A. This section includes plug-in and feeder busways, 600 V and under.
B. Related Sections: the following Division 16 Sections contain requirements
that relate to this section:
1 "LV wires and Cables" for bus drop cables.
2 "Main Distribution Boards" for busway termination provisions
3 "Transformers" for busway termination provisions.
4. "Supporting Devices" for busway support provisions to building
structure.
1.03 SUBMITTALS
A. General submit the following in accordance with Conditions of Contract.
1. Product data for busway products.
2. Coordination Drawings: layout floor plans and elevations showing
busway system. Designate components and accessories including
clamps, brackets, hanger rods, bus plugs, tap boxes, expansion joints,
straight lengths, fittings, firestops, and weather seals. Show accurately
scaled components and spatial relationships to adjacent equipment and
building features. Show busway types, dimensions, and finishes.
1.04 QUALITY ASSURANCE
A. Codes and standards:
1. IEC439-2 (BS 5486 Part 2) "Particular Requirements for Busbar
Trunking Systems and Busways".
2. UL 857 Busways and associated fittings.
B. Single-Source Responsibility: provide busway and its all components
(tap of units, circuit breakers, etc.) from a single manufacturer.
1.05 DELIVERY, STORAGE AND HANDLING
2
A. Store busways in clean dry space having a uniform temperature and
constant air circulation. If uniform temperature space is not available,
provide temporary heat to keep storage space 5 deg C minimum above
temperature of surrounding spaces.
B. Handle busways to avoid damage to internal components, enclosures, and
finishes. Avoid subjecting busway to twisting, denting, impact, and
rough handling. Do not Install damaged busway and remove from
project site.
C. Furnish the following extra materials matching products installed as
described below, packaged with protective covering for storage and
identified with labels clearly describing contents:
1. Bus Plugs: furnish quantity of bus plug units equal to ten percent of
amount installed, but no less than one unit of each type installed.
PART 2- PRODUCTS
2.01 MANUFACTURES
A. Available Manufacturers: subject to compliance with requirements,
specifications, regulations and design drawings
2.02 BUSWAYS (GENERAL)
A. Busway shall be provided complete and of following type as shown on
drawings:
1. Plug-in type, indoor, complete with manufacturer's recommended fittings
and accessories where indicated and as required for a complete,
functioning and safe installation.
B. Busways shall include bus bars, electrical insulators, enclosures, flanges,
elbows, offsets, cable tap boxes, weatherheads, transformer connections,
power take-off sections, expansion joints, end closures, supports, and
other components and accessories needed to form complete systems.
C. Ratings: three phase with voltage and current ratings and requirements
for neutral and ground conductors as indicated and specified. Short
circuit ratings of busways shall be in excess of those indicated for each
location.
D. Bus bars Conductor Material: hard drawn Copper with not less than 98
percent conductivity.
E Bus Bars: silver plated at electrical contact surfaces and insulated over
entire length, with flame retardant 130 deg C class insulation applied by
moulding, extrusion or electrodeposited process.
F. Hot Spot Temperature Rise: not in excess of 55 deg C above an ambient
temperature of 50 deg C at any point in the busway when busway is
operated at rated load current and system frequency.
2.03 FEEDER BUSWAY
3
A. Low impedance bus way in non ventilated housing, single-bolt joints
using ANSI 316 stainless steel bolts, ratings as indicated and specified.
B. Voltage: 400/230 Volts, 3 Phase: five (5) conductors with 100 percent
neutral capacity.
C. Short-Circuit Withstand: Not less than 50 kA symmetrical rms amperes
for three (3) seconds.
D. Temperature Rise: 55°C above 45°C ambient maximum.
E. Bus Materials: Current-carrying electrolytic copper conductors with not
less than 98% conductivity, fully insulated with Class 130 C insulation
except at joints; tinplated surface at joints.
F. Ground Bus: Copper.
G. Enclosure: Weatherproof, IP 549, metal enclosed sandwich type with
manufacturer's standard enamel finish, sealed seams, drains with
removable closures.
H. Fittings and Accessories: Manufacturer's standard elbows, equipment
terminations, fire stops, expansion fittings, spring-mounted vertical riser
supports, rigid floor supports, horizontal hangers, tap fittings, and
flange fittings.
2.04 FINISHES
A. Indoor Busway: manufacturer's standard finish over corrosion resistant
pretreatment.
2.05 SUPPORTS AND ACCESSORIES
A. General: as recommended by busway manufacturer and conforming to
Division 16 section "Supporting Devices".
B. Spring Mounted Vertical Riser Supports: adjustable for leveling and
spring tension and arranged to permit relative movement between floor
and busway.
C. Rigid Floor Supports: adjustable for leveling.
D. Expansion Section: capacity and conductor provisions same as adjacent
busway section. Arranged to absorb expansion and contraction of bus
bars and housing.
E. Fasteners to connect busway supports to the building structure as
follows:
1.Expansion Anchors: carbon steel wedge or sleeve type.
2.Toggle Bolts: all steel spring head type.
3. Powder Driven Threaded Studs: heat treated steel, designed
specifically for the intended service.
2.06 FIRE STOPPING
4
A. General: materials approved for fire ratings consistent with penetrated
barriers.
B. Wall and Floor Flanges: sheet steel, 2 mm (12-gage) minimum thickness
close fitting to busway arranged to close the wall or floor opening at the
busway penetration.
C. Two-Part Sealant: formed-in-place sealant as specified in paragraph
"Fire- Resistant Joint Sealers" in Division 16.
PART 3- EXECUTION
3.01 INSTALLATION OF BUSWAYS
A. Install busways and accessories as indicated and in compliance with
applicable requirements of applicable codes/regulations. Conform to
manufacturer's written instructions except where more stringent
requirements apply.
B. Tighten connectors and terminals, including screws and bolts, in
accordance with equipment manufacturer's published torque tightening
values for equipment connectors. Where manufacturer's torquing
requirements are not indicated, tighten connectors and terminals to
comply with tightening torques specified in the approved applicable
standards.
C. Expansion Fittings: install at locations where busway crosses a building
expansion joint. In addition, install at intervals in long runs or risers
where length comes within 10 percent of the maximum length without
expansion joints stated by the manufacturer for the type and material of
busway installed.
D. Fire Stops: install fire stops where busway penetrates fire-rated walls
and floors. Seal between busway and opening and around opening with
sealant or sealing mortar having fire rating not less than that of wall or
floor penetrated Where busway manufacturer's sealing and stopping
devices are not fire rated. Provide fire stopping as required to satisfy
authority having jurisdiction and Engineers approval.
E. Weather Seal: install integral weather seal where busway penetrates
exterior wall or roof. Provide appropriate flange and seal around
openings to make weather tight.
F. Floor Penetrations: provide a minimum 75 mm (3-inch-high) curb
around busway penetrations of floors to prevent water from spills and
leaks from contacting busway.
G. Support busway from the building structure independently from other
suspended items.
H. Conform to manufacturer's recommendations for selection, spacing, and
installation of supports.
5
I. Strength of each support including fastenings to the structure shall be
adequate to support busway load wultiplied by a safety factor of at least
four or 90 kg ( 200 lb), whichever is greater.
J. Fastening Supports: unless otherwise indicated, fasten supports securely
to the building structure as specified In Division 16 Section "Supporting
Devices".
K. Support at Connections to Equipment: where busways connect to
equipment, provide flanged fittings fastened to the busway and to the
equipment. Support the busway separately. Do not carry the weight of
the busway on the equipment enclosure.
3.02 EARTHING
A. Provide electrical bonding and equipment earthing connections for
busways as indicated and specified in Section "Earthing System".
B. Tighten bonding and earthing connections to comply with tightening
torques specified in applicable Standard of to assure permanent and
effective earthing.
3.03 FIELD QUALITY CONTROL
A. Test busway runs prior to energizing as follows and provide written
report of tests.
B. Phasing: verify that proper phase relationships exist between source,
busway, and connected equipment using phase rotation meter and
verifying phase continuity from source to equipment.
C. Insulation Resistance: measure IR for all busway components with 1000
Volt d.c. megohm meter and compare in report with manufacturer's
stated acceptable values. Measure each phase to phase and each phase to
earth, Any reading should be better than 50 megohm-meter.
D. Energize busway and demonstrate functioning in accordance with
requirements.
E. Test Failures: correct deficiencies identified by tests and make ready for
retest. Verify that equipment meets the specified requirements.
3.04 FACTORY TEST:
1. The Contractor shall be responsible for performing the BUS WAY
factory test.
2. The BUS WAY factory test shall be performed at the country of origin
the presence of the Client's, Electrical Consultant and Engineer's
representatives team. the team will comprise three representatives all
expenses are to be borne by the Contractor.
3. the contractor shall provide to the engineer a certified factory test report.
6
3.05 CLEANING AND FINISH REPAIR
A. Upon completion of installation of busways, remove burrs, dirt, and
construction debris and repair damaged finish including chips, scratches
and abrasions.
B. Galvanized Finish: repair damage using a zinc-rich paint recommended
by the manufacturer.
C. Paint Finish: repair damage using matching touch-up coating
recommended by the manufacturer.
3.06 ADJUSTMENT
A. Align busway runs vertically and horizontally to eliminate sags and
twists. Provide support stiffeners at locations where indicated and where
there is excessive movement.
B. Check bus plug circuit breaker trip settings, fuse ratings, and starter
overload elements against connected loads and revise as required to
conform to recommended values.
END OF SECTION 16466
PART 1-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of Contract apply to this Section.
B. Requirements of the following Division 16 Sections apply to this section:
1. "Basic Electrical Requirements”.
1.02 SUMMARY
A. This section includes plug-in and feeder busways, 600 V and under.
B. Related Sections: the following Division 16 Sections contain requirements
that relate to this section:
1 "LV wires and Cables" for bus drop cables.
2 "Main Distribution Boards" for busway termination provisions
3 "Transformers" for busway termination provisions.
4. "Supporting Devices" for busway support provisions to building
structure.
1.03 SUBMITTALS
A. General submit the following in accordance with Conditions of Contract.
1. Product data for busway products.
2. Coordination Drawings: layout floor plans and elevations showing
busway system. Designate components and accessories including
clamps, brackets, hanger rods, bus plugs, tap boxes, expansion joints,
straight lengths, fittings, firestops, and weather seals. Show accurately
scaled components and spatial relationships to adjacent equipment and
building features. Show busway types, dimensions, and finishes.
1.04 QUALITY ASSURANCE
A. Codes and standards:
1. IEC439-2 (BS 5486 Part 2) "Particular Requirements for Busbar
Trunking Systems and Busways".
2. UL 857 Busways and associated fittings.
B. Single-Source Responsibility: provide busway and its all components
(tap of units, circuit breakers, etc.) from a single manufacturer.
1.05 DELIVERY, STORAGE AND HANDLING
2
A. Store busways in clean dry space having a uniform temperature and
constant air circulation. If uniform temperature space is not available,
provide temporary heat to keep storage space 5 deg C minimum above
temperature of surrounding spaces.
B. Handle busways to avoid damage to internal components, enclosures, and
finishes. Avoid subjecting busway to twisting, denting, impact, and
rough handling. Do not Install damaged busway and remove from
project site.
C. Furnish the following extra materials matching products installed as
described below, packaged with protective covering for storage and
identified with labels clearly describing contents:
1. Bus Plugs: furnish quantity of bus plug units equal to ten percent of
amount installed, but no less than one unit of each type installed.
PART 2- PRODUCTS
2.01 MANUFACTURES
A. Available Manufacturers: subject to compliance with requirements,
specifications, regulations and design drawings
2.02 BUSWAYS (GENERAL)
A. Busway shall be provided complete and of following type as shown on
drawings:
1. Plug-in type, indoor, complete with manufacturer's recommended fittings
and accessories where indicated and as required for a complete,
functioning and safe installation.
B. Busways shall include bus bars, electrical insulators, enclosures, flanges,
elbows, offsets, cable tap boxes, weatherheads, transformer connections,
power take-off sections, expansion joints, end closures, supports, and
other components and accessories needed to form complete systems.
C. Ratings: three phase with voltage and current ratings and requirements
for neutral and ground conductors as indicated and specified. Short
circuit ratings of busways shall be in excess of those indicated for each
location.
D. Bus bars Conductor Material: hard drawn Copper with not less than 98
percent conductivity.
E Bus Bars: silver plated at electrical contact surfaces and insulated over
entire length, with flame retardant 130 deg C class insulation applied by
moulding, extrusion or electrodeposited process.
F. Hot Spot Temperature Rise: not in excess of 55 deg C above an ambient
temperature of 50 deg C at any point in the busway when busway is
operated at rated load current and system frequency.
2.03 FEEDER BUSWAY
3
A. Low impedance bus way in non ventilated housing, single-bolt joints
using ANSI 316 stainless steel bolts, ratings as indicated and specified.
B. Voltage: 400/230 Volts, 3 Phase: five (5) conductors with 100 percent
neutral capacity.
C. Short-Circuit Withstand: Not less than 50 kA symmetrical rms amperes
for three (3) seconds.
D. Temperature Rise: 55°C above 45°C ambient maximum.
E. Bus Materials: Current-carrying electrolytic copper conductors with not
less than 98% conductivity, fully insulated with Class 130 C insulation
except at joints; tinplated surface at joints.
F. Ground Bus: Copper.
G. Enclosure: Weatherproof, IP 549, metal enclosed sandwich type with
manufacturer's standard enamel finish, sealed seams, drains with
removable closures.
H. Fittings and Accessories: Manufacturer's standard elbows, equipment
terminations, fire stops, expansion fittings, spring-mounted vertical riser
supports, rigid floor supports, horizontal hangers, tap fittings, and
flange fittings.
2.04 FINISHES
A. Indoor Busway: manufacturer's standard finish over corrosion resistant
pretreatment.
2.05 SUPPORTS AND ACCESSORIES
A. General: as recommended by busway manufacturer and conforming to
Division 16 section "Supporting Devices".
B. Spring Mounted Vertical Riser Supports: adjustable for leveling and
spring tension and arranged to permit relative movement between floor
and busway.
C. Rigid Floor Supports: adjustable for leveling.
D. Expansion Section: capacity and conductor provisions same as adjacent
busway section. Arranged to absorb expansion and contraction of bus
bars and housing.
E. Fasteners to connect busway supports to the building structure as
follows:
1.Expansion Anchors: carbon steel wedge or sleeve type.
2.Toggle Bolts: all steel spring head type.
3. Powder Driven Threaded Studs: heat treated steel, designed
specifically for the intended service.
2.06 FIRE STOPPING
4
A. General: materials approved for fire ratings consistent with penetrated
barriers.
B. Wall and Floor Flanges: sheet steel, 2 mm (12-gage) minimum thickness
close fitting to busway arranged to close the wall or floor opening at the
busway penetration.
C. Two-Part Sealant: formed-in-place sealant as specified in paragraph
"Fire- Resistant Joint Sealers" in Division 16.
PART 3- EXECUTION
3.01 INSTALLATION OF BUSWAYS
A. Install busways and accessories as indicated and in compliance with
applicable requirements of applicable codes/regulations. Conform to
manufacturer's written instructions except where more stringent
requirements apply.
B. Tighten connectors and terminals, including screws and bolts, in
accordance with equipment manufacturer's published torque tightening
values for equipment connectors. Where manufacturer's torquing
requirements are not indicated, tighten connectors and terminals to
comply with tightening torques specified in the approved applicable
standards.
C. Expansion Fittings: install at locations where busway crosses a building
expansion joint. In addition, install at intervals in long runs or risers
where length comes within 10 percent of the maximum length without
expansion joints stated by the manufacturer for the type and material of
busway installed.
D. Fire Stops: install fire stops where busway penetrates fire-rated walls
and floors. Seal between busway and opening and around opening with
sealant or sealing mortar having fire rating not less than that of wall or
floor penetrated Where busway manufacturer's sealing and stopping
devices are not fire rated. Provide fire stopping as required to satisfy
authority having jurisdiction and Engineers approval.
E. Weather Seal: install integral weather seal where busway penetrates
exterior wall or roof. Provide appropriate flange and seal around
openings to make weather tight.
F. Floor Penetrations: provide a minimum 75 mm (3-inch-high) curb
around busway penetrations of floors to prevent water from spills and
leaks from contacting busway.
G. Support busway from the building structure independently from other
suspended items.
H. Conform to manufacturer's recommendations for selection, spacing, and
installation of supports.
5
I. Strength of each support including fastenings to the structure shall be
adequate to support busway load wultiplied by a safety factor of at least
four or 90 kg ( 200 lb), whichever is greater.
J. Fastening Supports: unless otherwise indicated, fasten supports securely
to the building structure as specified In Division 16 Section "Supporting
Devices".
K. Support at Connections to Equipment: where busways connect to
equipment, provide flanged fittings fastened to the busway and to the
equipment. Support the busway separately. Do not carry the weight of
the busway on the equipment enclosure.
3.02 EARTHING
A. Provide electrical bonding and equipment earthing connections for
busways as indicated and specified in Section "Earthing System".
B. Tighten bonding and earthing connections to comply with tightening
torques specified in applicable Standard of to assure permanent and
effective earthing.
3.03 FIELD QUALITY CONTROL
A. Test busway runs prior to energizing as follows and provide written
report of tests.
B. Phasing: verify that proper phase relationships exist between source,
busway, and connected equipment using phase rotation meter and
verifying phase continuity from source to equipment.
C. Insulation Resistance: measure IR for all busway components with 1000
Volt d.c. megohm meter and compare in report with manufacturer's
stated acceptable values. Measure each phase to phase and each phase to
earth, Any reading should be better than 50 megohm-meter.
D. Energize busway and demonstrate functioning in accordance with
requirements.
E. Test Failures: correct deficiencies identified by tests and make ready for
retest. Verify that equipment meets the specified requirements.
3.04 FACTORY TEST:
1. The Contractor shall be responsible for performing the BUS WAY
factory test.
2. The BUS WAY factory test shall be performed at the country of origin
the presence of the Client's, Electrical Consultant and Engineer's
representatives team. the team will comprise three representatives all
expenses are to be borne by the Contractor.
3. the contractor shall provide to the engineer a certified factory test report.
6
3.05 CLEANING AND FINISH REPAIR
A. Upon completion of installation of busways, remove burrs, dirt, and
construction debris and repair damaged finish including chips, scratches
and abrasions.
B. Galvanized Finish: repair damage using a zinc-rich paint recommended
by the manufacturer.
C. Paint Finish: repair damage using matching touch-up coating
recommended by the manufacturer.
3.06 ADJUSTMENT
A. Align busway runs vertically and horizontally to eliminate sags and
twists. Provide support stiffeners at locations where indicated and where
there is excessive movement.
B. Check bus plug circuit breaker trip settings, fuse ratings, and starter
overload elements against connected loads and revise as required to
conform to recommended values.
END OF SECTION 16466
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