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15030 Electrical Provisions of Mechanical Work and Mechanical Provisions of Electrical Work

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					Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2


SECTION 15030 – ELECTRICAL PROVISIONS OF MECHANICAL WORK AND MECHANICAL
PROVISIONS OF ELECTRICAL WORK


PART 1 - GENERAL


1.1        WORK INCLUDED

      A.   Extent of electrical provisions to be provided as mechanical work and the requirements for
           piping and duct work connections to equipment furnished under Division 16 is indicated in other
           Division-15 sections, on drawings, and as further specified in this section.

      B.   Types of work, normally recognized as electrical but provided as mechanical, specified or
           partially specified in this section, include but are not necessarily limited to the following:

           1.    Motors for mechanical equipment.
           2.    Starters for motors of mechanical equipment, but only where specifically indicated to be
                 furnished integrally with equipment and for all 2-speed motors.
           3.    Wiring from motors to disconnect switches or junction boxes for motors of mechanical
                 equipment, but only where specifically indicated to be furnished integrally with equipment.
           4.    Furnish and install all electrical control circuit conduits and wiring and control devices
                 required to perform the equipment control functions as specified in Division 15, including
                 float control switches, flow control switches, and similar mechanical-electrical devices
                 provided for mechanical systems.
           5.    Electrical heating coils and similar elements in mechanical equipment.
           6.    Furnish and install capacitors for power factor correction on all mechanical equipment as
                 specified in other sections of this Division.
           7.    All electrical equipment provided and the wiring and installation of electrical equipment
                 shall be in accordance with the requirements of this Section and Division 16.

      C.   The mechanical work required for equipment furnished under Division 16 specified or partially
           specified in this section include, but are not necessarily limited to, the following:

           1.    Piping and ductwork connections for Engine driven electrical generator.

      D.   Refer to Division-15 Controls sections for control system wiring.

      E.   Refer to other Division-15 sections for specific individual mechanical equipment electrical
           requirements.

      F.   Refer to Division-16 sections for motor starters and controls not furnished integrally with
           mechanical equipment.

      G.   Refer to Division-16 sections for junction boxes and disconnect switches required for motors
           and other electrical units of mechanical equipment.


1.2        QUALITY ASSURANCE

      A.   Coordination with Electrical Work: Wherever possible, match elements of electrical provisions
           of mechanical work with similar elements of electrical work specified in Division-16 sections.
           Comply with applicable requirements of Division-16 sections for electrical work of this section
           which is not otherwise specified.

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MECHANICAL PROVISIONS OF ELECTRICAL WORK
(10108)
Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2

      B.   Standards: For electrical equipment and products, comply with applicable NEMA standards,
           and refer to NEMA standards for definitions of terminology herein. Comply with National
           Electrical Code (NFPA 70) for workmanship and installation requirements.

      C.   Electrical components and materials shall be UL labeled.


1.3        SUBMITTALS

      A.   Listing, Motors of Mechanical Work:

           1.    Concurrently with submittal of mechanical products listing (Division 15 Section “Shop
                 Drawings” and Division-1 requirements), submit separate listing showing rating, power
                 characteristics, application (connected equipment), and general location of every motor to
                 be provided with mechanical work.
           2.    Submit updated information promptly when and if initial data is revised.
           3.    Include in listing of motors, notation of whether motor starter is furnished or installed
                 integrally with motor or equipment containing motor.
           4.    Submit thermal overload selection calculations including required selection parameters.


PART 2 - PRODUCTS


2.1        MOTORS

      A.   Manufacturer: Except where item of mechanical equipment (which otherwise complies with
           requirements) must be integrally equipped with motor produced by another manufacturer,
           provide motors for mechanical equipment manufactured by single one of the following:

           1.    ABB Industrial Systems
           2.    Baldor Electric Co.
           3.    General Electric Co.
           4.    Louis Allis Div.; Litton Industrial Products, Inc.
           5.    Marathon Electric Mfg. Corp.
           6.    Magne Tek Inc.
           7.    US Electriic Motors.

      B.   Motor Characteristics: Except where more stringent requirements are indicated, comply with
           the following requirements for motors of mechanical work:

           1.    Torque characteristics shall be sufficient to satisfactorily accelerate the driven loads.
           2.    Service Factor:

                 a.     Minimum 1.15 for polyphase motors and 1.35 for single-phase motors.
                 b.     For installation altitudes greater than 3,300 feet the effective service factor shall be
                        reduced to 1.0 on motors with nameplate service factors of 1.15 and greater.
                 c.     Motors with nameplate Service Factors of 1.0 shall not be used for installation
                        altitudes greater than 3,300 feet.

           3.    Irrespective of the schedule, installed motor sizes shall be large enough so that the
                 driven load will not require the motor to operate in the service factor range, but not less
                 than 75% of the nameplate; if a standard size does not fall within this range the next
                 larger NEMA standard motor size shall be used.


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Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2

         4.     Temperature Rating: Rated for 40 deg C environment with maximum 50 deg C
                temperature rise for continuous duty at full load (Class A Insulation). Provide Class B
                Insulation for motor ambient conditions in excess of 40 deg. C.
         5.     Starting Capability: Provide each motor capable of making starts as frequently as
                indicated by automatic control system, and not less than 5 evenly time spaced starts per
                hour for manually controlled motors.
         6.     Motors 1/2 horsepower and larger shall have bearings with pressure grease lubrication.
         7.     Motors connected to drive equipment by belt shall be furnished with adjustable slide rail
                bases except for fractional horsepower motors which shall have slotted bases. Motor
                leads shall be permanently identified and supplied with connectors.
         8.     Phases and Current Characteristics:

                a.    Provide squirrel-cage induction polyphase motors for 1 hp and larger.
                b.    Provide capacitor-start single-phase motors for 3/4 hp and smaller, except 1/6 hp
                      and smaller may, at equipment manufacturer's option, be split-phase type.
                c.    Coordinate current characteristics with power specified in Division-16 sections, and
                      with individual equipment requirements specified in other Division-15 sections.
                d.    For 2-speed motors provide 2 separate windings on polyphase motors and
                      equipment starter with decelerating relay.
                e.    Do not purchase motors until power characteristics available at locations of
                      motors, ambient conditions, and altitude have been confirmed, and until rotation
                      directions have been confirmed and the motor selected accordingly.

         9.     Motor Construction: Provide general purpose, continuous duty, premium efficiency
                motors, Design "B" except "C" where required for high starting torque.

                a.    Bearings: Ball or roller bearings with inner and outer shaft seals, regreasable
                      except permanently sealed where motor is normally inaccessible for regular
                      maintenance. Where belt drives and other drives produce lateral or axial thrust in
                      motor, provide bearings designed to resist thrust loading. Refer to individual
                      sections of Division 15 for fractional-hp light-duty motors where sleeve-type
                      bearings are permitted.
                b.    Enclosure Type: Except as otherwise indicated, provide open drip-proof motors for
                      indoor use where satisfactorily housed or remotely located during operation, and
                      provide guarded drip-proof motors where exposed to contact by employees or
                      building occupants. Provide weather- protected Type I for outdoor use, Type II
                      where not housed. Refer to individual sections of Division 15 for other enclosure
                      requirements.
                c.    Overload Protection: Provide built-in thermal overload protection and, where
                      indicated, provide internal sensing device suitable for signaling and stopping motor
                      at starter.
                d.    Each motor shall be free from magnetic hum, designed for quiet operation.

         10.    Efficiency:

                a.    Provide motors with efficiency in accordance with IEEE Standard 112, test Method
                      B.
                b.    Minimum efficiencies and power factors shall not be less than listed in the table
                      below for 460V, 3 phase, 1,800 rpm motors:

                                              1,200 RPM                             1,800 RPM
                                         PREMIUM EFFICIENCY                    PREMIUM EFFICIENCY
                     MOTOR SIZE      EFFICIENCY POWER FACTOR               EFFICIENCY POWER FACTOR
                        (HP)             (%)            (%)                    (%)            (%)
                          1             82.5             64                   85.5            74.5

ELECTRICAL PROVISIONS OF MECHANICAL WORK AND                                                    15030 - 3
MECHANICAL PROVISIONS OF ELECTRICAL WORK
(10108)
Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2

                                                1,200 RPM                             1,800 RPM
                                           PREMIUM EFFICIENCY                    PREMIUM EFFICIENCY
                      MOTOR SIZE       EFFICIENCY POWER FACTOR               EFFICIENCY POWER FACTOR
                         (HP)              (%)            (%)                    (%)            (%)
                          1.5             87.5            65.5                  86.5            76.5
                            2             88.5            68.5                  86.5            75.5
                            3             89.5             71                   89.5            78.5
                            5             89.5             73                   89.5            81.5
                          7.5               91             78                     91            83.5
                           10               91            78.5                  91.7            83.5
                           15             91.7             78                     93             83
                           20             91.7            78.5                    93             86
                           25               93            78.5                  93.6             83
                           30               93             79                   94.1            83.5
                           40             94.1             79                   94.1             78
                           50             94.1             79                   94.5             79
                           60             94.5            80.5                    95             84
                           75             94.5            81.5                    95            85.5
                          100               95             83                   94.4            85.5
                          125               95            83.5                  95.4            86.5
                          150              958             84                   95.8            85.5
                          200             95.8             82                   95.8            86.5

                 c.     Minimum efficiencies and power factors for motors at other voltages and speeds
                        for smaller than 1 HP in size shall be from the same “Energy Efficient” product line
                        that conforms to the above table.

           11.   Variable Speed Motors: Variable speed motors used in conjunction with variable
                 frequency drives shall be inverter duty type and rated for across the line starting.

      C.   Name Plate: Provide metal nameplate on each motor, indicating full identification of
           manufacturer, ratings, characteristics, power factor, construction, special features and similar
           information.


2.2        STARTERS, ELECTRICAL DEVICES, AND WIRING

      A.   Motor Starter Characteristics:

           1.    Enclosures: NEMA 1, general purpose enclosures with padlock ears, except in wet
                 locations shall be NEMA 3R with conduit hubs, or units in hazardous locations which
                 shall have NEC proper class and division.
           2.    Type and size of starter shall be as recommended by motor manufacturer and the driven
                 equipment manufacturer for applicable protection and start-up condition.

      B.   Manual Switches:

           1.    Provide manual switch and pilot light for motors 1/3 hp and smaller, except where
                 interlock or automatic operation is indicated.
           2.    Provide extra switch positions and pilot lights for multi-speed motors.
           3.    Overload Protection: Provide melting alloy type thermal overload relays.

      C.   Magnetic Starters: Provide magnetic starters for motors 1 hp and larger, and for smaller motors
           where interlock or automatic operation is indicted. Include the following:

ELECTRICAL PROVISIONS OF MECHANICAL WORK AND                                                      15030 - 4
MECHANICAL PROVISIONS OF ELECTRICAL WORK
(10108)
Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2

           1.     Hand-Off-Auto selector switch and pilot lights, properly arranged for single-speed or
                  multi-speed operation as indicated.
           2.     Trip-free thermal overload relays, each phase.
           3.     Interlocks, pneumatic switches and similar devices as required for coordination with
                  control requirements of Division-15 Controls sections.
           4.     Built-in 120-volt control circuit transformer, fused from line side, where service exceeds
                  240 volts.
           5.     Externally operated manual reset.
           6.     Undervoltage release or protection.

      D.   Electrical Heating Elements: Where electric resistance coils and other heating elements are
           included in mechanical equipment or otherwise indicated as mechanical work, and except as
           otherwise indicated, provide 120-volt units where rating is less than 2 KW, higher-voltage
           single-phase units where rating is 2 KW but less than 5 KW, and higher-voltage 3-phase units
           where rating is 5 KW and greater.

      E.   Motor Connections:        Provide flexible conduit, except where plug-in electrical cords are
           specifically indicated.


2.3        CAPACITORS

      A.   Capacitors shall be installed on all motors 1 horsepower and larger, that have an uncorrected
           power factor of less than 85 percent at rated load.

      B.   Features:

           1.     Individual unit cells.
           2.     All welded steel housing.
           3.     Each capacitor internally fused.
           4.     Non-flammable synthetic liquid impregnant.
           5.     Craft tissue insulation.
           6.     Aluminum foil electrodes.
           7.     KVAR size shall be as required to correct motor power factor to 90 percent or better.
           8.     Provide disconnect switches for each capacitor.


2.4        DISCONNECT SWITCHES

      A.   Fusible switches: fused, each phase; general duty; horsepower rated; non-teasible quick-make,
           quick-break mechanism; dead front line side shield; solderless lugs suitable for copper or
           aluminum conductors; spring reinforced fuse clips; electro silver plated current carrying parts;
           hinged doors; operating lever arranged for locking in the "OPEN" position; arc quenchers;
           capacity and characteristics as indicated.

      B.   Non-fusible switches: for equipment 2 horsepower and smaller, shall be horsepower rated;
           toggle switch type; quantity of poles and voltage rating as indicated. For equipment larger than
           2 horsepower, switches shall be the same as fusible type.

      C.   Manual Starters: for equipment 1/3 horsepower and smaller, shall be horsepower rated; toggle
           switch type; quantity of poles and voltage rating as indicated equipped with thermal overloads.


2.5        EQUIPMENT FABRICATION


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MECHANICAL PROVISIONS OF ELECTRICAL WORK
(10108)
Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2

      A.   General: Fabricate mechanical equipment for secure mounting of motors and other electrical
           items included in work. Provide either permanent alignment of motors with equipment, or
           adjustable mountings as applicable for belt drives, gear drives, special couplings and similar
           indirect coupling of equipment. Provide safe, secure, durable, and removable guards for motor
           drives, arranged for lubrication and similar running-maintenance without removal of guards.


2.6        CONTRACTOR COORDINATION

      A.   The following information is provided as an aid to interdisciiplinary coordination. It is the general
           contractors responsibility to assure that full and complete coordination of the subcontractors is
           achieved to provide complete and fully operational systems.

      B.   Unless otherwise indicated, all motors, equipment, controls, etc. shall be furnished, set in place
           and wired in accordance with the following schedule.

                                                                                                     CONTROL
                                                    FURNISHED            SET         POWER             WIRING
                             ITEM                      BY                BY         WIRING BY            BY
              Equipment Motors                      MC         MC                   EC              --
              Motor Control Centers                 EC         EC                   EC              MC*
              Unit Mounted Motor Starters,          MC         MC                   EC              MC
              Contactors, and Overload Hea-
              ters
              Loose Motor Starters, Contac-     EC             EC                   EC              MC
              tors and Overload Heaters
              Fused and Unfused Disconnect      EC             EC                   EC              --
              Switches, Thermal Overload and
              Heaters
              Manual Operating Multi-speed      MC             EC                   EC              EC
              Switches
              Control Relays and Transfor-      MC             MC                   EC              MC
              mers
              Thermostats and Time Switches MC                 MC                   EC              MC
              Temperature Control Panels        MC             MC                   EC              MC
              Variable Speed Drives             MC             EC                   EC              MC
              Electrically Operated Terminal    MC             MC                   EC              MC
              Air Boxes
              Electric actuators and Solenoid   MC             MC                   MC              MC
              Valves, Damper Motors, PE and
              EP Switches
              Combination Smoke and Fire        MC             MC                   EC              EC
              Dampers
              Duct Smoke Detectors              EC             MC                   EC              EC
              Refrigeration Equipment, Cool-    MC             MC                   EC              MC
              ing Tower, and Controls
              Pushbutton Stations               MC             MC                   EC              EC
              Temporary Heating Connections MC                 MC                   EC              MC
              MC = Mechanical Contractor
              EC = Electrical Contractor
              * Temperature Control Wiring Only By Mechanical Contractor

      C.   All starters shall be furnished by the Mechanical Contractor unless otherwise indicated on the
           preceding schedule. All starters shall be provided with three O.L. heaters, one normally-open
           and one normally-closed auxiliary contact, and shall conform to NEC and NEMA requirements.
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(10108)
Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2

      D.   Immersion thermostats, remote bulb thermostats, motorized valves, controls, etc., which are an
           integral part of the mechanical equipment or directly attached to ducts, piping, equipment, etc.,
           shall be set in place under mechanical contract. Motor driven units which are controlled from
           line voltage manual operating or start-stop switches or automatic controls such as line voltage
           thermostats, float switches or time switches which operate at line voltage shall be wired for both
           power and control circuit under the electrical contract. This description shall apply to equipment
           not covered by 15971 (Electric Control System)

      E.   Factory prewired control panels and packaged HVAC units shall be provided with one power
           source connection point unless noted otherwise.

      F.   For split HVAC systems (systems with remote condensers or condensing unit), the Electrical
           Contractor shall provide 3/4" conduit with six #14 THW between units for control wiring
           connections by the Mechanical Contractor.


PART 3 - EXECUTION


3.1        INSTALLATION

      A.   Install motors on motor mounting systems in accordance with motor manufacturer's instructions,
           securely anchored to resist torque, drive thrusts, and other external forces inherent in
           mechanical work. Secure sheaves and other drive units to motor shafts with keys and Allen set
           screws, except motors of 1/3 hp and less may be secured with Allen set screws on flat surface
           of shaft. Unless otherwise indicated, set motor shafts parallel with machine shafts.

      B.   Deliver starters and wiring devices which have not been factory- installed on equipment unit to
           electrical Installer for installation.


3.2        EQUIPMENT FURNISHED UNDER DIVISION 16

      A.   The following applies to all applicable equipment furnished under Division 16 which requires
           mechanical piping or ductwork connections.

      B.   Engine driven electrical generators.

                      DIVISION 16 RESPONSIBILITY                         DIVISION 15 RESPONSIBILITY
              Furnish and install engine driven generator
              complete with all accessories as specified in
              division 16. The accessories shall include the
              following:
              Furnish muffler and flexible connector.              Install muffler and flexible connection, fur-
                                                                   nish and install engine exhaust piping and
                                                                   exhaust pipe insulation. Provide drain
                                                                   valve at all low points of exhaust system.
              Furnish sizing information to Division 15 con-       Furnish and install fuel oil storage tank, day
              tractor for fuel oil day tank. Furnish and install   tank, transfer pump, and required controls.
              day tank eliminator if utilized.
              Set engine generator and provide information         Furnish and install all fuel oil supply, return
              to Division 15 contractor on fuel oil consump-       and vent piping.
              tion, day tank elevation etc.
              Provide engine mounted radiator cooling sys-         Furnish and install louvers, ductwork from
              tem.                                                 radiator discharge to exhaust louver. Pro-
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MECHANICAL PROVISIONS OF ELECTRICAL WORK
(10108)
Colorado Department of Military and Veterans Affairs
Replace Mechanical Units - Aurora Drill Floor Phase 2 of 2

                    DIVISION 16 RESPONSIBILITY                     DIVISION 15 RESPONSIBILITY
                                                             vide flexible duct connection at engine and
                                                             provide intake exhaust and recirculating
                                                             dampers complete with automatic control.
             Connect low level fuel alarm in fuel storate    Provide low level fuel alarm switch in main
             tank.                                           fuel oil tank.
             Furnish and install 50-50% ethylene glycol
             solution to completely fill cooling system.

END OF SECTION 15030




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