MOTOR-CONTROL CENTERS
PART I-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including General and
Supplementary Conditions and Division I Specification Sections, apply to
this Section.
B. Requirements of the following Division 16 Sections apply to this Section:
1. "Basic Electrical Materials and Methods".
2. " 2. "Motor Controllers".
1.02 SUMMARY
A. This section includes motor -control centers (MCC ' s) and motor control
panels " (MCP's) for use on a.c. circuits rated 600 V or less, as shown on
drawings and schedules.
B. Related Sections: the following Division 16 Sections contain requirements
that relate to this Section:
1. "Circuit Breakers" for circuit breakers, and other similar devices used in
MCC's/MCP's.
2. "Motor Controllers" for motor-control devices installed in MCC's
/MCP's.
3. "Electrical Identification" for identification labels and warning signs for
MCC's/MCP's and their components.
4. "Wires and Cables", for insulated cables used in switch gear.
C. Refer to section 15030 in Division 15 for variable frequency drive-
D. Refer to applicable sections in Division 15 for requirements in connection
with system control and operation.
E. Refer to Division 15 section "Building Management System" for connection to
BMS.
1.03 SUBMITTALS
A. General: submit the following in accordance with Conditions of Contract and
Division I Specification Sections.
B. Product data for each product and component specified or required for the
installation.
2
C. Shop drawings for each MCC/MCP including dimensioned plans and
elevations and component lists. Show ratings, including short-time and
short-circuit ratings, and horizontal and vertical bus ampacities.
D. Schedule of features, characteristics, ratings, and factory coordinated
protective settings of individual MCC/MCP units.
E. Wiring Diagrams: interconnecting wiring diagrams pertinent to the class and
type specified for the MCC/MCP. Schematic diagram of the whole
installation, elementary diagrams of each controller unit clearly indicating
components and terminal markings.
F. Shop drawing of spare fuse cabinet showing material, dimensions, and features
including storage provisions for fuse cartons.
G. Qualification data for field-testing organization certificates, signed by the
Contractor, certifying that the organization complies with the requirements
specified in Quality Assurance below. Include list of completed projects with
project names, addresses, names of Engineers and Owners, plus other
information specified.
H. Certified reports 6f field tests and observations specified in the article "Field
Quality Control" in this Section.
1. Maintenance data for MCC's/MCP's, for inclusion in "Operating and
Maintenance Manuals" specified in Division 1 and in Division 16, Section .
'Basic Electrical Requirements.
1.04 QUALITY ASSURANCE
A. Compliance with IEC or BS: comply with the requirements of the following
standards, as applicable:
IEC269.1, BS 88 Cartridge fuses
IEC255, IEC50, BS 142 Electrical Protective Relays
BS 159 Busbar & Busbar Connections
IEC 185, BS 3938 Current Transformers
IEC 337-2, BS 4794 PT2 Control Devices
IEC 51 and IEC 512, BS 89 Direct acting Indicating analogue
Electrical measuring Instruments.
IEC 521, BS 5685 Electric Meters
IEC 144, BS 5420 Degree of protection of enclosures
IEC 947-184, BS 5424 PTI Contactors
IEC947 Low Voltage Switch gear & Control gear
IEC 439, BS 5486 PTI LV Switch gear and Control Gear
Assemblies.
IEC 292-1,1A, 1B, BS Motor starters D.O.L.
4941 PTI
IEC 292-2, BS 4941 PT2 Motor Starter, Reduced Voltage Star
/Delta
IEC 292-4, BS 4941 PT4 Motor Starter Reduced Voltage Auto
Transformer
NEMA ICS 2 Industrial control devices, controllers and
assemblies
3
B. Field- Testing Organization Qualifications: to qualify for acceptance, the
testing organization must demonstrate, that it has the experience and
capability to conduct satisfactorily the testing indicated.
C. Product Selection for Restricted Space: ensure that MCC/MCP spaces are
sufficient for type and size of MCC's, including clearances from adjacent
surfaces, for feeder management and installations entering or leaving the
MCC's/MCP's and for maintenance.
1.05 DELIVERY. STORAGE. AND HANDLING
A. Deliver in shipping splits of lengths that can be moved past obstructions in
delivery path as indicated.
B. Store so condensation will not occur on or in MCC's/MCP's: Provide
temporary heaters as required to prevent condensation. Store MCC's/MCP's
in clean dry spaces. Protect from weather, dirt, fumes, water, construction
debris and physical damage.
C. Handle MCC's/MCP's in accordance with manufacturer's rigging and moving
instructions.
1.06 EXTRA MATERIALS
A. Spare Fuses: furnish six spares of each type and rating of fuse and fusible
devices required. Include spares for:
1. Control power fuses.
B. Spare Indicating Lights: furnish 6 of each type required.
C. Touch-Up Paint: furnish 3 half-pint containers.
PART 2-PRODUCTS
2.01 MANUFACTURERS
A. Available Manufacturers: subject to compliance with requirements,
specifications, drawings and regulations.
B. For approved manufacturers refer to the recommended manufacturers list.
2.02 MOTOR-CONTROL CENTERS (MCC's)
A. Type: totally enclosed freestanding sectional type, with sections joined to
form one assembly. Sections to be designed to allow other sections to be
easily added or removed.
B. Construction: 2 mm thick sheet steel, adequately reinforced and braced for
maximum rigidity, sand blasted, rust inhibited after fabrication and sprayed
with one coat primer and two coats enamel internally and externally.
4
C. Enclosure:. to IEC 439 and IEC947-1, protection IP51 to IEC 529 except as
otherwise indicated.
1. Use of draw-out design for combination starter units. Reduced voltage
controllers for motors above 150 HP may be of the fixed mounted type.
D. Voltage Rating: 1000V rated insulation voltage and 600V rated operational
voltage.
E. Wiring Classification: class II, Type B, as defined in NEMA ICS 2 or equal
standard (unit wiring diagrams including interconnection and interlocking to
be provided by MCC supplier, and each starter unit to be completely factory
interwired up to a terminal back to be provided per unit, including interwiring
between units and interlocking provisions to remote devices).
F. Compartments: modular, with individual doors with concealed hinges and
quick-captive screw fasteners. For combination starter units provide
interlocks so that disconnect means must be in the off position before door
can be opened, and so door cannot be closed with the disconnect means in the
on position, except by consciously operating a permissive release device.
Provide handles with off position down and which can be locked in the off
position."
G. Interchangeability: construct compartments so that it is possible to remove
units without opening adjacent doors, disconnecting adjacent compartments,
or disturbing the operation of other units in the control center. Units requiring
the same size compartment shall be interchangeable, and compartments shall
be constructed to permit ready rearrangement of units such as replacing 3
single units with a unit requiring 3 spaces without cutting or welding.
H. Wiring Spaces: provide each vertical section of structure with horizontal and
Vertical wiring spaces for wiring to each unit compartment in each section.
Provide supports to hold wiring rigidly in place.
I. Short-Circuit Current Rating for Each Section: equal to or greater than
indicated available fault current of the system in rms symmetrical amperes at
the motor-control center location for one second minimum, at rated voltage
and frequency.
J. Schematic Wiring Diagrams: to be firmly fixed under glassine within each
motor control unit, showing each component, terminal markings and
component symbols and labels.
2.03 MOTOR CONTROL PANELS (MCP'S)
A. Type: wall mounted or unit mounted, lockable type, IP42 for indoor
installations.
B. Construction: minimum 2.0 mm thick hot-dip galvanized steel sheet, finished
with one coat etch primer and one coat stove enamel internally and externally.
C. Panels Installed Outdoors and in Wet Areas: to have weatherproof totally
sealed water and dustproof IP65. enclosures.
5
D. Voltage Rating: 1000V rated insulation voltage and 600V rated operational
voltage.
E. Components: panels are to contain necessary breakers, starters, busbars, push
buttons switches, selector switches, relays, indicating lights, interconnecting
and interlock wiring and all devices and accessories required for automatic or
manual operation of equipment as specified under equipment concerned.
F. Labels: starters, switches, electrical devices and accessories to be clearly
labeled in English as to function and number. Labels to be permanently fixed
under each component.
G. Schematic and wiring diagrams to be mounted in permanent approved
manner on inside of panel door. Diagrams are to show each component cross
referenced with component labels.
2.04 BUSES
A. Material: 98% pure electrolytic copper, with electro-silver plated contact
surfaces, full length, one piece, sized based on a total maximum operating
temperature of 90°C at full continuous rating ( 50°C temperature rise above -
45°C ambient).
B. Ampacity Ratings of Main Buses: as main incoming device; circuit breaker or
disconnect switch, or as indicated on drawings.
C. Neutral Buses: Full size.
D. Equipment Earthing Bus: non-insulated, horizontal copper bus 50 mm
(2-inches) by 6mm (1/4-inch), minimum, and in accordance with the
standards.
E. Busbar Arrangement: extend main phase, neutral and ground buses with same
capacity the entire length of the MCC/MCP, with provision for future
extension at both ends by means of bolt holes and captive bus splice sections
or approved equivalent.
2.05 FUNCTIONAL FEATURES
A. General: provide a modular arrangement of motor controllers, control
devices, over current protective devices, transformers, instruments,
indicating panels, blank panels, and other items mounted in the compartments
of the motor- control center as indicated.
B. Motor: Controller Units: provide combination controller .units as specified in
Division 16 Section “Motor Controllers"; of types and with features, ratings,
and circuit assignments indicated. Provide units that automatically line up
and connect with vertical section buses while being racked into their normal
energized positions. Units shall have short-circuit current ratings equal to or
greater than the short-circuit current rating of the MCC/MCP section. .
6
C. Over current Protective Devices: provide types of devices with features,
ratings, and circuit assignments indicated. Individual feeder tap units
acceptable through 250 ampere rating only, shall be installed on draw out
mountings with connectors that automatically line up and connect with
vertical section buses while being racked into their normal energized
positions.
D. Phase Failure and Phase Sequence Protection. is to be provided on the main
circuit breaker/switch of the MCC's/MCP's with individual trip indication for
each function. Necessary shunt trip devices are to be provided.
E. Spaces and Blank Units: compartments fully bussed and equipped with guide
rails or equivalent, ready for insertion of draw out Units.
F. Spare Units: fully equipped with breakers/starters, with type, sizes, and
ratings as indicated, and installed in compartments indicated “spare"
G. Connection to BMS: coordinate with the BMS supplier and provide all
necessary interface devices, instruments, transducers, dry contacts, etc. in the
MCC's/MCP's for connection of all required points to the BMS as specified or
indicated in the BMS schedules.
2.06 IDENTIFICATION PRODUCTS:
A. Provide identifying devices as specified in division 16 section" Electrical
identification”.
2.07 FINISHES
A. Manufacturer's standard finish suitable for the environment in which
installed. Colour to be approved by the Engineer.
2.08 CONCRETE BASES
A. Concrete and Reinforcement: provide in accordance with Specification
Division 3.
B. Shop Drawings and Details: provide exact dimensions and all necessary
framing provisions, cabling provisions and submit for approval by the
Engineer.
PART3-EXECUTION
3.01 INSTALLATION
A. General: install MCC's/MCP's in accordance with the manufacturer's written
installation instructions and regulations/codes applicable.
B. Anchor each motor-control center assembly to steel-channel sills arranged
and sized in accordance with manufacturer's recommendations. Attach by
tack welding or bolting. Level and grout sills flush with motor-control
center mounting surface
.
7
3.02 CONCRETE BASES
A. General: where a membrane-waterproofed floor or pressure slab is indicated
under the MCC/MCP location, or elsewhere as indicated, provide a concrete
foundation pad. Install l00 mm-high sills on the pad as specified above.
B. Form concrete equipment bases having permanent steel frame, using
approved standard steel channels, locate as indicated, and construct 100 mm (
4 fiches) larger in both directions than supported unit. Miter and weld corners
and provide cross bracing. Anchor or key to floor slab.
C. Install reinforcing bars tied to frame, and place anchor bolts and sleeves using
manufacturer's installation template.
D. Form concrete equipment bases using framing lumber with form release
compound. Locate as indicated and construct 100 mm ( 4 inches) larger in
both directions than supported unit. Chamfer top edges and corners.
E. Install reinforcing bars, and place anchor bolts and sleeves using
manufacturer's installation template.
F. Place concrete and allow to cure before installation of equipment.
G. Clean exposed steel frames and apply 2 coats of rust-preventative metal
primer and 2 coats of exterior, gloss, alkyd enamel in color selected by the
Engineer.
H. Remove temporary lifting eyes, channels, brackets, and temporary blocking
of moving parts from MCC units and components.
3.03 IDENTIFICATION
A. Identify field-installed wiring and components and provide warning signs as
specified in Division 16 Section "Electrical Identification.
B. Operating Instructions: frame printed operating instructions for MCCs,
including control sequences, and emergency procedures. Fabricate frame of
finished wood or metal and cover instructions with clear acrylic plastic.
Mount on front of MCC's/MCP's.
3.04 CONNECTIONS:
A. A. Tighten MCC/MCP bus joint bolts and electrical connector and terminal
bolts in accordance with manufacturer's installation instructions and
torque-tightening values. Where manufacturer's torque values are not stated,
use those specified in applicable standards.
3.05 FIELD QUALITY CONTROL
A. General: comply with applicable requirements of the Engineer approved
testing organization.
8
B. Testing Organization: arrange and pay for the services of an independent
electrical testing organization to perform quality control electrical testing and
calibration, visual and mechanical inspections, and tests of MCC's/MCP's.
C. Testing Preparation and Pretesting: perform the following preparations for
tests:
1. Test insulation resistance of buses and portions of control wiring that
disconnect from solid-state devices through normal disconnecting
features. Insulation resistance less than 100 megohms is not acceptable.
2. Make continuity tests of circuits.
3. Provide set of Contract Documents to test organization. Include full
updating on final system configuration and parameters where they
supplement or differ from those indicated in original Contract
Documents.
4. Provide manufacturer's instructions for installation and testing of
MCC/MCP to test organization.
5. Inspect MCC's/MCP's for defects and physical damage, testing laboratory
labels, circuit connections, and nameplate compliance with up-to-date
system drawings.
6. .Perform operational test and exercise of mechanical components and
other operable devices in accordance with manufacturer's instruction
manual.
7. Check MCC/MCP anchorage, external clearances, and alignment and fit
of components including internal elements.
8. Check tightness of bolted electrical connections with calibrated torque
wrench. Refer to manufacturer's instructions for proper torque values.
9. Perform visual and mechanical inspection and related work for motor
control and protective devices as specified in Division 16 Sections" L V
Circuit Breakers" and "Motor Controllers."
10. Device Ratings and Settings: verify ratings and settings of overload
relays, motor circuit protectors, and any overcurrent protective devices.
Make final adjustments of devices in accordance with Division 16
Sections "L V Circuit Breakers" and "Motor Controllers or other related
Sections of the Specification and drawings."
D. Quality Control Testing Program: assure MCC/MCP installation meets
specified requirements, is operational within specified tolerances, and
provides appropriate protection for systems and equipment.
1. Test and inspect MCC's/MCP's in accordance with manufacturer's
recommendations and these specifications.
2. Schedule tests and provide notification at least 1 week in advance of test
commencement.
9
3. Reports: prepare written reports of test results and observations. Report
defective materials and workmanship. Include complete records of
adjustments and corrective action taken.
4. Labeling: On satisfactory completion of tests and related work, apply a
label to tested components indicating results, person responsible, and
date.
5. Verify appropriate capacity, over current protection, and operating
voltage of control power elements including control power transformers
and control power wiring.
6. Check phasing of supply source to the bus.
7. Test motor-control devices as specified in Division 16 Section "Motor-,
Controllers.”
8. Test over current protective devices as specified in Division 16 Section
“Over current Protective Devices"
E. Retesting: correct deficiencies and retest. Verify by the retests that specified
requirements are met.
F. Equipment shall be tested and full type test certificate issued by an approved
independent test laboratory shall be submitted.
3.06 CLEANING
A. Inspect interior and exterior of MCC' s/MCP' s. Remove paint splatters and.
other spots, dirt, and debris. Touch up scratches and mars of finish to match
original finish.
3.07 EARTHING
A. Provide equipment earthing of MCC' s/MCP's as indicated and as specified in
Section “Earthing" Tighten connections to comply with tightening torques
specified by Manufacturer or in applicable standards to ensure permanent and
effective earth.
3.08 DEMONSTRATION
A. Training: arrange and- pay for the services of factory-authorized service
representatives to demonstrate MCC's/MCP's and train Owner's maintenance
personnel.
B. Training: conduct a minimum of 4 hours of training in operation and
maintenance as specified under "Instructions to Owner Employees" in
Division 1 Section "Project Close-out." Include training relating to equipment
operation and maintenance procedures.
C. Schedule training with at least seven days' advance notification.
END OF SECTION 16482
,
PART I-GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of Contract, including General and
Supplementary Conditions and Division I Specification Sections, apply to
this Section.
B. Requirements of the following Division 16 Sections apply to this Section:
1. "Basic Electrical Materials and Methods".
2. " 2. "Motor Controllers".
1.02 SUMMARY
A. This section includes motor -control centers (MCC ' s) and motor control
panels " (MCP's) for use on a.c. circuits rated 600 V or less, as shown on
drawings and schedules.
B. Related Sections: the following Division 16 Sections contain requirements
that relate to this Section:
1. "Circuit Breakers" for circuit breakers, and other similar devices used in
MCC's/MCP's.
2. "Motor Controllers" for motor-control devices installed in MCC's
/MCP's.
3. "Electrical Identification" for identification labels and warning signs for
MCC's/MCP's and their components.
4. "Wires and Cables", for insulated cables used in switch gear.
C. Refer to section 15030 in Division 15 for variable frequency drive-
D. Refer to applicable sections in Division 15 for requirements in connection
with system control and operation.
E. Refer to Division 15 section "Building Management System" for connection to
BMS.
1.03 SUBMITTALS
A. General: submit the following in accordance with Conditions of Contract and
Division I Specification Sections.
B. Product data for each product and component specified or required for the
installation.
2
C. Shop drawings for each MCC/MCP including dimensioned plans and
elevations and component lists. Show ratings, including short-time and
short-circuit ratings, and horizontal and vertical bus ampacities.
D. Schedule of features, characteristics, ratings, and factory coordinated
protective settings of individual MCC/MCP units.
E. Wiring Diagrams: interconnecting wiring diagrams pertinent to the class and
type specified for the MCC/MCP. Schematic diagram of the whole
installation, elementary diagrams of each controller unit clearly indicating
components and terminal markings.
F. Shop drawing of spare fuse cabinet showing material, dimensions, and features
including storage provisions for fuse cartons.
G. Qualification data for field-testing organization certificates, signed by the
Contractor, certifying that the organization complies with the requirements
specified in Quality Assurance below. Include list of completed projects with
project names, addresses, names of Engineers and Owners, plus other
information specified.
H. Certified reports 6f field tests and observations specified in the article "Field
Quality Control" in this Section.
1. Maintenance data for MCC's/MCP's, for inclusion in "Operating and
Maintenance Manuals" specified in Division 1 and in Division 16, Section .
'Basic Electrical Requirements.
1.04 QUALITY ASSURANCE
A. Compliance with IEC or BS: comply with the requirements of the following
standards, as applicable:
IEC269.1, BS 88 Cartridge fuses
IEC255, IEC50, BS 142 Electrical Protective Relays
BS 159 Busbar & Busbar Connections
IEC 185, BS 3938 Current Transformers
IEC 337-2, BS 4794 PT2 Control Devices
IEC 51 and IEC 512, BS 89 Direct acting Indicating analogue
Electrical measuring Instruments.
IEC 521, BS 5685 Electric Meters
IEC 144, BS 5420 Degree of protection of enclosures
IEC 947-184, BS 5424 PTI Contactors
IEC947 Low Voltage Switch gear & Control gear
IEC 439, BS 5486 PTI LV Switch gear and Control Gear
Assemblies.
IEC 292-1,1A, 1B, BS Motor starters D.O.L.
4941 PTI
IEC 292-2, BS 4941 PT2 Motor Starter, Reduced Voltage Star
/Delta
IEC 292-4, BS 4941 PT4 Motor Starter Reduced Voltage Auto
Transformer
NEMA ICS 2 Industrial control devices, controllers and
assemblies
3
B. Field- Testing Organization Qualifications: to qualify for acceptance, the
testing organization must demonstrate, that it has the experience and
capability to conduct satisfactorily the testing indicated.
C. Product Selection for Restricted Space: ensure that MCC/MCP spaces are
sufficient for type and size of MCC's, including clearances from adjacent
surfaces, for feeder management and installations entering or leaving the
MCC's/MCP's and for maintenance.
1.05 DELIVERY. STORAGE. AND HANDLING
A. Deliver in shipping splits of lengths that can be moved past obstructions in
delivery path as indicated.
B. Store so condensation will not occur on or in MCC's/MCP's: Provide
temporary heaters as required to prevent condensation. Store MCC's/MCP's
in clean dry spaces. Protect from weather, dirt, fumes, water, construction
debris and physical damage.
C. Handle MCC's/MCP's in accordance with manufacturer's rigging and moving
instructions.
1.06 EXTRA MATERIALS
A. Spare Fuses: furnish six spares of each type and rating of fuse and fusible
devices required. Include spares for:
1. Control power fuses.
B. Spare Indicating Lights: furnish 6 of each type required.
C. Touch-Up Paint: furnish 3 half-pint containers.
PART 2-PRODUCTS
2.01 MANUFACTURERS
A. Available Manufacturers: subject to compliance with requirements,
specifications, drawings and regulations.
B. For approved manufacturers refer to the recommended manufacturers list.
2.02 MOTOR-CONTROL CENTERS (MCC's)
A. Type: totally enclosed freestanding sectional type, with sections joined to
form one assembly. Sections to be designed to allow other sections to be
easily added or removed.
B. Construction: 2 mm thick sheet steel, adequately reinforced and braced for
maximum rigidity, sand blasted, rust inhibited after fabrication and sprayed
with one coat primer and two coats enamel internally and externally.
4
C. Enclosure:. to IEC 439 and IEC947-1, protection IP51 to IEC 529 except as
otherwise indicated.
1. Use of draw-out design for combination starter units. Reduced voltage
controllers for motors above 150 HP may be of the fixed mounted type.
D. Voltage Rating: 1000V rated insulation voltage and 600V rated operational
voltage.
E. Wiring Classification: class II, Type B, as defined in NEMA ICS 2 or equal
standard (unit wiring diagrams including interconnection and interlocking to
be provided by MCC supplier, and each starter unit to be completely factory
interwired up to a terminal back to be provided per unit, including interwiring
between units and interlocking provisions to remote devices).
F. Compartments: modular, with individual doors with concealed hinges and
quick-captive screw fasteners. For combination starter units provide
interlocks so that disconnect means must be in the off position before door
can be opened, and so door cannot be closed with the disconnect means in the
on position, except by consciously operating a permissive release device.
Provide handles with off position down and which can be locked in the off
position."
G. Interchangeability: construct compartments so that it is possible to remove
units without opening adjacent doors, disconnecting adjacent compartments,
or disturbing the operation of other units in the control center. Units requiring
the same size compartment shall be interchangeable, and compartments shall
be constructed to permit ready rearrangement of units such as replacing 3
single units with a unit requiring 3 spaces without cutting or welding.
H. Wiring Spaces: provide each vertical section of structure with horizontal and
Vertical wiring spaces for wiring to each unit compartment in each section.
Provide supports to hold wiring rigidly in place.
I. Short-Circuit Current Rating for Each Section: equal to or greater than
indicated available fault current of the system in rms symmetrical amperes at
the motor-control center location for one second minimum, at rated voltage
and frequency.
J. Schematic Wiring Diagrams: to be firmly fixed under glassine within each
motor control unit, showing each component, terminal markings and
component symbols and labels.
2.03 MOTOR CONTROL PANELS (MCP'S)
A. Type: wall mounted or unit mounted, lockable type, IP42 for indoor
installations.
B. Construction: minimum 2.0 mm thick hot-dip galvanized steel sheet, finished
with one coat etch primer and one coat stove enamel internally and externally.
C. Panels Installed Outdoors and in Wet Areas: to have weatherproof totally
sealed water and dustproof IP65. enclosures.
5
D. Voltage Rating: 1000V rated insulation voltage and 600V rated operational
voltage.
E. Components: panels are to contain necessary breakers, starters, busbars, push
buttons switches, selector switches, relays, indicating lights, interconnecting
and interlock wiring and all devices and accessories required for automatic or
manual operation of equipment as specified under equipment concerned.
F. Labels: starters, switches, electrical devices and accessories to be clearly
labeled in English as to function and number. Labels to be permanently fixed
under each component.
G. Schematic and wiring diagrams to be mounted in permanent approved
manner on inside of panel door. Diagrams are to show each component cross
referenced with component labels.
2.04 BUSES
A. Material: 98% pure electrolytic copper, with electro-silver plated contact
surfaces, full length, one piece, sized based on a total maximum operating
temperature of 90°C at full continuous rating ( 50°C temperature rise above -
45°C ambient).
B. Ampacity Ratings of Main Buses: as main incoming device; circuit breaker or
disconnect switch, or as indicated on drawings.
C. Neutral Buses: Full size.
D. Equipment Earthing Bus: non-insulated, horizontal copper bus 50 mm
(2-inches) by 6mm (1/4-inch), minimum, and in accordance with the
standards.
E. Busbar Arrangement: extend main phase, neutral and ground buses with same
capacity the entire length of the MCC/MCP, with provision for future
extension at both ends by means of bolt holes and captive bus splice sections
or approved equivalent.
2.05 FUNCTIONAL FEATURES
A. General: provide a modular arrangement of motor controllers, control
devices, over current protective devices, transformers, instruments,
indicating panels, blank panels, and other items mounted in the compartments
of the motor- control center as indicated.
B. Motor: Controller Units: provide combination controller .units as specified in
Division 16 Section “Motor Controllers"; of types and with features, ratings,
and circuit assignments indicated. Provide units that automatically line up
and connect with vertical section buses while being racked into their normal
energized positions. Units shall have short-circuit current ratings equal to or
greater than the short-circuit current rating of the MCC/MCP section. .
6
C. Over current Protective Devices: provide types of devices with features,
ratings, and circuit assignments indicated. Individual feeder tap units
acceptable through 250 ampere rating only, shall be installed on draw out
mountings with connectors that automatically line up and connect with
vertical section buses while being racked into their normal energized
positions.
D. Phase Failure and Phase Sequence Protection. is to be provided on the main
circuit breaker/switch of the MCC's/MCP's with individual trip indication for
each function. Necessary shunt trip devices are to be provided.
E. Spaces and Blank Units: compartments fully bussed and equipped with guide
rails or equivalent, ready for insertion of draw out Units.
F. Spare Units: fully equipped with breakers/starters, with type, sizes, and
ratings as indicated, and installed in compartments indicated “spare"
G. Connection to BMS: coordinate with the BMS supplier and provide all
necessary interface devices, instruments, transducers, dry contacts, etc. in the
MCC's/MCP's for connection of all required points to the BMS as specified or
indicated in the BMS schedules.
2.06 IDENTIFICATION PRODUCTS:
A. Provide identifying devices as specified in division 16 section" Electrical
identification”.
2.07 FINISHES
A. Manufacturer's standard finish suitable for the environment in which
installed. Colour to be approved by the Engineer.
2.08 CONCRETE BASES
A. Concrete and Reinforcement: provide in accordance with Specification
Division 3.
B. Shop Drawings and Details: provide exact dimensions and all necessary
framing provisions, cabling provisions and submit for approval by the
Engineer.
PART3-EXECUTION
3.01 INSTALLATION
A. General: install MCC's/MCP's in accordance with the manufacturer's written
installation instructions and regulations/codes applicable.
B. Anchor each motor-control center assembly to steel-channel sills arranged
and sized in accordance with manufacturer's recommendations. Attach by
tack welding or bolting. Level and grout sills flush with motor-control
center mounting surface
.
7
3.02 CONCRETE BASES
A. General: where a membrane-waterproofed floor or pressure slab is indicated
under the MCC/MCP location, or elsewhere as indicated, provide a concrete
foundation pad. Install l00 mm-high sills on the pad as specified above.
B. Form concrete equipment bases having permanent steel frame, using
approved standard steel channels, locate as indicated, and construct 100 mm (
4 fiches) larger in both directions than supported unit. Miter and weld corners
and provide cross bracing. Anchor or key to floor slab.
C. Install reinforcing bars tied to frame, and place anchor bolts and sleeves using
manufacturer's installation template.
D. Form concrete equipment bases using framing lumber with form release
compound. Locate as indicated and construct 100 mm ( 4 inches) larger in
both directions than supported unit. Chamfer top edges and corners.
E. Install reinforcing bars, and place anchor bolts and sleeves using
manufacturer's installation template.
F. Place concrete and allow to cure before installation of equipment.
G. Clean exposed steel frames and apply 2 coats of rust-preventative metal
primer and 2 coats of exterior, gloss, alkyd enamel in color selected by the
Engineer.
H. Remove temporary lifting eyes, channels, brackets, and temporary blocking
of moving parts from MCC units and components.
3.03 IDENTIFICATION
A. Identify field-installed wiring and components and provide warning signs as
specified in Division 16 Section "Electrical Identification.
B. Operating Instructions: frame printed operating instructions for MCCs,
including control sequences, and emergency procedures. Fabricate frame of
finished wood or metal and cover instructions with clear acrylic plastic.
Mount on front of MCC's/MCP's.
3.04 CONNECTIONS:
A. A. Tighten MCC/MCP bus joint bolts and electrical connector and terminal
bolts in accordance with manufacturer's installation instructions and
torque-tightening values. Where manufacturer's torque values are not stated,
use those specified in applicable standards.
3.05 FIELD QUALITY CONTROL
A. General: comply with applicable requirements of the Engineer approved
testing organization.
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B. Testing Organization: arrange and pay for the services of an independent
electrical testing organization to perform quality control electrical testing and
calibration, visual and mechanical inspections, and tests of MCC's/MCP's.
C. Testing Preparation and Pretesting: perform the following preparations for
tests:
1. Test insulation resistance of buses and portions of control wiring that
disconnect from solid-state devices through normal disconnecting
features. Insulation resistance less than 100 megohms is not acceptable.
2. Make continuity tests of circuits.
3. Provide set of Contract Documents to test organization. Include full
updating on final system configuration and parameters where they
supplement or differ from those indicated in original Contract
Documents.
4. Provide manufacturer's instructions for installation and testing of
MCC/MCP to test organization.
5. Inspect MCC's/MCP's for defects and physical damage, testing laboratory
labels, circuit connections, and nameplate compliance with up-to-date
system drawings.
6. .Perform operational test and exercise of mechanical components and
other operable devices in accordance with manufacturer's instruction
manual.
7. Check MCC/MCP anchorage, external clearances, and alignment and fit
of components including internal elements.
8. Check tightness of bolted electrical connections with calibrated torque
wrench. Refer to manufacturer's instructions for proper torque values.
9. Perform visual and mechanical inspection and related work for motor
control and protective devices as specified in Division 16 Sections" L V
Circuit Breakers" and "Motor Controllers."
10. Device Ratings and Settings: verify ratings and settings of overload
relays, motor circuit protectors, and any overcurrent protective devices.
Make final adjustments of devices in accordance with Division 16
Sections "L V Circuit Breakers" and "Motor Controllers or other related
Sections of the Specification and drawings."
D. Quality Control Testing Program: assure MCC/MCP installation meets
specified requirements, is operational within specified tolerances, and
provides appropriate protection for systems and equipment.
1. Test and inspect MCC's/MCP's in accordance with manufacturer's
recommendations and these specifications.
2. Schedule tests and provide notification at least 1 week in advance of test
commencement.
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3. Reports: prepare written reports of test results and observations. Report
defective materials and workmanship. Include complete records of
adjustments and corrective action taken.
4. Labeling: On satisfactory completion of tests and related work, apply a
label to tested components indicating results, person responsible, and
date.
5. Verify appropriate capacity, over current protection, and operating
voltage of control power elements including control power transformers
and control power wiring.
6. Check phasing of supply source to the bus.
7. Test motor-control devices as specified in Division 16 Section "Motor-,
Controllers.”
8. Test over current protective devices as specified in Division 16 Section
“Over current Protective Devices"
E. Retesting: correct deficiencies and retest. Verify by the retests that specified
requirements are met.
F. Equipment shall be tested and full type test certificate issued by an approved
independent test laboratory shall be submitted.
3.06 CLEANING
A. Inspect interior and exterior of MCC' s/MCP' s. Remove paint splatters and.
other spots, dirt, and debris. Touch up scratches and mars of finish to match
original finish.
3.07 EARTHING
A. Provide equipment earthing of MCC' s/MCP's as indicated and as specified in
Section “Earthing" Tighten connections to comply with tightening torques
specified by Manufacturer or in applicable standards to ensure permanent and
effective earth.
3.08 DEMONSTRATION
A. Training: arrange and- pay for the services of factory-authorized service
representatives to demonstrate MCC's/MCP's and train Owner's maintenance
personnel.
B. Training: conduct a minimum of 4 hours of training in operation and
maintenance as specified under "Instructions to Owner Employees" in
Division 1 Section "Project Close-out." Include training relating to equipment
operation and maintenance procedures.
C. Schedule training with at least seven days' advance notification.
END OF SECTION 16482
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