SECTION 26 2713

ELECTRICITY Metering

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LANL MASTER SPECIFICATION

When editing to suit project, author shall add job-specific requirements
and delete only those portions that in no way apply to the activity
(e.g., a component that does not apply). To seek a variance from
applicable requirements, contact the ESM Electrical POC.

When assembling a specification package, include applicable
specifications from all Divisions, especially Division 1, General
Requirements.

Delete information within "stars" during editing.

Specification developed for ML-4 projects.  For ML-1, 2, and 3,
additional requirements and independent reviews may be required; see ESM
Ch 1 Section Z10 Specifications and Quality sections.

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1.  GENERAL

    1.  Section Includes

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Edit list match project requirements. Use the single-phase watt-hour
meter for 120/240 V single phase services up to 200 amperes. Use the
digital electrical power meter, test switches, and instrument
transformers for three-phase services rated 800 amperes or less. Use the
multi-function, digital electrical meter, test switches, and instrument
transformers for three-phase services rated more than 800 amperes. Use
the meter cabinets where the instrument transformers will not be
installed within the service entrance switchboard or switchgear.

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A.  Single-phase watt-hour meter and socket.

B.  Digital electrical power meter

C.  Multi-function, digital electrical meter

D.  Test switches.

E.  Instrument transformers.

F.  Meter cabinets.

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2.  LANL PERFORMED WORK

    A.  The LANL Support Services Subcontractor (Utilities Dept.) will
        inspect, program, and test the meter.

3.  SUBMITTALS

    A.  Submit the following in accordance with Section 01 3300,
        Submittal Procedures:

        1.  Catalog data and manufacturer\'s technical data, including
            data proving that materials comply with specified
            requirements. Provide catalog sheets showing ratings,
            dimensions, and enclosure details.

        2.  Installation instructions indicating application conditions
            and limitations of use stipulated by Product testing agency
            specified under Regulatory Requirements. Include
            instructions for storage, handling, protection, examination,
            preparation, installation, and starting of Product.

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Edit the following article match project requirements.

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3.  Shop drawing of installation in \[meter cabinets\] \[switchboard\]
    \[switchgear\].

4.  Wiring diagram showing connection of meter and display modules,
    instrument transformers, test switches, potential fuses, and
    communications circuits.

5.  Operation and maintenance instructions.

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4.  REGULATORY REQUIREMENTS

    A.  Conform to requirements of the *National Electrical Code (NEC)*.

    B.  Conform to requirements of ANSI C12.1 *American National
        Standard Code for Electricity Metering*.

    C.  Furnish products listed and labeled by a Nationally Recognized
        Testing Laboratory (NRTL) as suitable for purposes specified and
        shown.

5.  COORDINATION

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Edit A match project requirements. Delete A if metering will be
installed in metering cabinets.

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A.  Coordinate installation of metering components in the service
    entrance \[switchboard\]\[switchgear assembly\].

B.  Coordinate the features of the meter and associated instrument
    transformers with the ratings and characteristics of the circuit to
    be metered.

C.  Provide not less than 14 working days notice to the LANL Support
    Services Subcontractor (Utilities Dept.) for inspection and testing
    of the meter prior to Project final inspection.

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6.  EXTRA MATERIALS

    A.  Furnish one spare for every five installed fuses, but not less
        than one set of three of each size and type.

7.  Receiving, Storing and Protecting

    A.  Receive, store, and protect, and handle products according to
        NECA 1, *Standard Practices for Good Workmanship in Electrical
        Construction*.

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2.  PRODUCTS

    1.  PRODUCT OPTIONS AND SUBSTITUTIONS

        A.  Refer to Section 01 2500, Substitution Procedures.

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Use the meter specified in the following article for 120/240 V single
phase services up to 200 Amps. Delete article if there is no
single-phase metering.

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1.  Single-Phase WATT-HOUR METER and Socket

    A.  Provide a self-contained, electro-mechanical watt-hour meter
        that meets the requirements of ANSI C12.10 *American National
        Standard for Electromechanical Watthour Meters* and has the
        following characteristics:

        1.  Form: 2S

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Use Class 100 for 100 A services and Class 200 for 200 A services.

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2.  Class: \[100\] \[200\]

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Use 15 A test current for Class 100 meters and 30 A test current for
Class 200 meters.

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3.  Test current: \[15\] \[30\] amps

4.  Voltage: 240 volts, single phase.

5.  Wires: 3

6.  Register: 5 dial clock type.

7.  Cover: Polycarbonate

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B.  Provide ringless type meter socket for single phase watt-hour meter.

    1.  Provide socket to accommodate \[overhead\] \[underground\]
        service.

    2.  Socket shall be suitable for outdoor installation.

    3.  Socket shall be rated 200 amps, 600 volts.

    4.  Socket shall have an integral lever bypass and jaw release.

    5.  Socket shall be NRTL listed to UL 414 *Standard for Meter
        Sockets*.

C.  Manufacturers:

    1.  Meter: ABB "Type AB1\".

    2.  Socket: Square D "Class 4131"

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Use the meter specified in the following article for Projects with
three-phase services rated 800 amperes or less. Delete article if not
applicable to the Project.

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2.  DIGITAL ELECTRICAL Power METER

    A.  Provide a digital electrical power meter as indicated on the
        Drawings. Meter shall meet the following standards:

        1.  Be NRTL listed to UL 508 Standard for Safety Industrial
            Control Equipment.

        2.  Meet requirements of ANSI C12.16, American National Standard
            for Solid-State Electricity Meters.

        3.  Meet NEMA C12.20, *Electricity Meters 0.2 and 0.5 Accuracy
            Classes,* class 0.5S for energy revenue metering.

    B.  The meter shall sample current and voltage signals at a rate
        high enough to provide true-RMS metering accurate beyond the
        30th harmonic.

    C.  The meter shall be rated for an operating temperature range of
        -25 degrees C to 70 degrees C

    D.  Meter shall have a current input withstand rating of 15 amperes
        continuous, 50 amperes for 10 seconds per hour and 500 amperes
        for 1 second per hour.

    E.  Setup parameters required for the meter shall be stored in
        non-volatile memory and retained in the event of a control power
        interruption. Any battery used to provide non-volatile memory
        must be serviceable from the front of the meter.

    F.  The meter shall display the following metered values on a
        faceplate alphanumeric readout and shall auto range between
        Units, Kilo-Units, and Mega-Units. The information shall be also
        available at a remote computer through a communications network:

        1.  Real-time readings (accuracy expressed as percent of
            reading):

            a.  Current: (±0.075 percent accuracy + 0.025% full scale)
                true RMS

> Phases A, B, C

b.  Voltage: (±0.075 percent accuracy + 0.025% full scale) true RMS

> Phases A-B, B-C, C-A
>
> Phases A-N, B-N, C-N

c.  Power: (±0.15 percent accuracy + 0.025% full scale) true RMS

> Real (watts)
>
> Reactive (vars)
>
> Apparent (VA)
>
> Phases A, B, C, 3-phase total

d.  Frequency: (±0.01 Hz) 45 to 67 Hz

e.  Power Factor: (±0.002 percent accuracy)

> 3-phase total

f.  Individual harmonics: magnitude and angle

g.  \% THD - Current:

> Phases A, B, C

h.  \% THD - Voltage:

> Phases A-B, B-C, C-A
>
> Phases A-N, B-N, C-N

2.  Energy Readings (accuracy expressed as percent of reading):

    a.  Real (kWh): (±0.5 percent accuracy)

> 3-phase total

b.  Apparent (kVAh): ±0.5 percent accuracy

> 3-phase total

3.  Demand readings:

    a.  Current (amperes):

> Present
>
> Peak

b.  Real power (kW):

> Present
>
> Peak

c.  Reactive power (kvar):

> Present
>
> Peak

d.  Apparent power (kVA):

> Present
>
> Peak

G.  Meter shall be capable of power demand calculations using either of
    the following user-selectable methods:

    1.  Thermal demand using a sliding window updated every 15 seconds
        with window length field selectable from 5 to 60 minutes in 5
        minute increments.

    2.  Block interval with or without sub-intervals. Window length
        field selectable from 5 to 60 minutes in 5 minute increments.
        Sub-interval length field selectable from 5 to 60 minutes in 5
        minute increments.

H.  The meter shall maintain a user selectable combination of trend and
    event logging information in non-volatile memory. The information
    shall be available at a remote computer through a communications
    network. Minimum trend and logging capabilities shall be as follows:

    1.  1 billing log.

    2.  1 custom data log

    3.  Event log date and time stamped to seconds

    4.  Minimum and maximum of worst phase date and time stamped.

    5.  Alarm and maintenance logs.

I.  The meter shall accept inputs from industry standard instrument
    transformers.

    1.  The meter shall allow potential connection to circuits up to 600
        volts AC without the use of external potential transformers.
        External potential transformer ratios up to 500,000:120 Vac
        shall be supported.

J.  Meter shall operate with AC or DC control power

    1.  115 to 415 Vac, 45 -- 67 Hz.

    2.  125 to 250 Vdc

K.  The meter shall be equipped with the following digital
    communications ports.

    1.  An RS-485 port that is capable of communicating over a twisted
        pair network using Modbus protocol.

L.  Meter shall provide KYZ output pulses that can be user-programmed
    for kWH, kVARH or kVAH. The value of a pulse shall be programmable,
    allowing control of the maximum pulse rate to meet the requirements
    of the receiving equipment.

M.  Provide a separately mounted display with the following features:

    1.  High visibility alpha-numeric display to show metering data,
        min/max values, alarms, and inputs,

    2.  Pushbuttons to allow operator to scroll through menus and select
        information to display.

    3.  Cable connection to the meter.

N.  Provide DIN rail mounted Ethernet to RS-485 gateway capable of at
    least 10 Base T communications to TCP/IP networks using embedded
    HTML pages.

O.  Provide DIN rail mounted NRTL-listed 24 Vdc Class 2 power supply
    with finger-safe line terminals rated for not less than 7.5 watts
    output; manufacturer: IDEC #PS5R-A24.

P.  Manufacturer: Square D PM820RD Power Meter and EGX100 Ethernet
    Gateway. No substitution.

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Use the meter specified in this article for Projects with three-phase
services rated greater than 800 amperes. Delete article if not
applicable to the Project.

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3.  MULTI-FUNCTION DIGITAL ELECTRICAL METER

    A.  Provide addressable multi-function, microprocessor-based,
        digital electrical meter(s) as indicated on the Drawings. Meter
        shall meet the following standards:

        1.  Be NRTL listed to UL 508 Standard for Safety Industrial
            Control Equipment.

        2.  Meet requirements of ANSI C12.16, American National Standard
            for Solid-State Electricity Meters.

        3.  Meet NEMA C12.20, *Electricity Meters 0.2 and 0.5 Accuracy
            Classes,* class 0.5S for energy revenue metering.

    B.  The meter shall sample current and voltage signals at a rate
        high enough to provide true-RMS metering accurate beyond the
        60th harmonic.

    C.  The meter shall be rated for an operating temperature range of
        -25 degrees C to 70 degrees C and have a current input withstand
        rating of 300 amps for 1 second.

    D.  Setup parameters required for the meter shall be stored in
        non-volatile memory and retained in the event of a control power
        interruption. Any battery used to provide non-volatile memory
        must be serviceable from the front of the meter.

    E.  The meter shall display the following metered values on a
        faceplate alphanumeric readout and shall auto range between
        Units, Kilo-Units, and Mega-Units. The information shall be also
        available at a remote computer through a communications network:

        1.  Real-time readings (accuracy expressed as percent of
            reading):

            a.  Current: ±0.20 percent accuracy, true RMS

> Phases A, B, C, 3-phase average

b.  Voltage: ±0.20 percent accuracy, true RMS

> Phases A-B, B-C, C-A
>
> 3-phase average line-to-line
>
> Phases A-N, B-N, C-N
>
> 3-phase average line-to-neutral

c.  Power: ±0.40 percent accuracy, true RMS

> Real (watts)
>
> Reactive (vars)
>
> Apparent (VA)
>
> Phases A, B, C, 3-phase total

d.  Frequency: ±0.04 percent accuracy

e.  Power Factor: ±0.80 percent accuracy

> Displacement
>
> Apparent
>
> Phases A, B, C, 3-phase total

f.  \% THD - Current: ±1.00 percent accuracy

> Phases A, B, C, Neutral

g.  \% THD - Voltage: ±1.00% accuracy

> Phases A-B, B-C, C-A
>
> Phases A-N, B-N, C-N

h.  K-Factor - Current: ±1.00% accuracy

> Phases A, B, C, 3-phase total

2.  Energy Readings (accuracy expressed as percent of reading):

    a.  Real (kWh): ±0.4% accuracy

> Phases A, B, C, 3-phase total
>
> Forward, reverse, net

b.  Reactive (kvarh): ±0.4% accuracy

> Phases A, B, C, 3-phase total
>
> Forward, reverse, net

c.  Apparent (kVAh): ±0.4% accuracy

> Phases A, B, C, 3-phase total

3.  Demand readings (accuracy expressed as percent of reading):

    a.  Current (amperes): ±0.4% accuracy

> 3-phase average
>
> Last completed interval, peak

b.  Real power (kW): ±0.4% accuracy

> 3-phase total
>
> Last completed interval, peak

c.  Reactive power (kvar): ±0.4% accuracy

> 3-phase total
>
> Last completed interval, peak

d.  Apparent power (kVA): ±0.4% accuracy

> 3-phase total
>
> Last completed interval, peak

F.  Meter shall be capable of power demand calculations using either of
    the following user-selectable methods:

    1.  Thermal demand using a sliding window updated every 15 seconds
        with window length field selectable from 5 to 60 minutes in 5
        minute increments.

    2.  Block interval with or without sub-intervals. Window length
        field selectable from 5 to 60 minutes in 5 minute increments.
        Sub-interval length field selectable from 5 to 60 minutes in 5
        minute increments.

G.  The meter shall have disturbance detection and disturbance waveform
    capture and shall provide waveform captures of steady state voltage
    and current waveforms that can be transmitted to a remote PC for
    display and analysis using appropriate software.

    1.  Meter shall be capable of storing in non-volatile memory up to
        30 cycles of each phase voltage and current sampled at a rate of
        128 samples per cycle.

    2.  Meter shall initiate waveform capture either on manual command
        from a remote PC or by self-triggering due to an over/under
        condition.

H.  The meter shall maintain a user selectable combination of trend and
    event logging information in non-volatile memory. The information
    shall be available for local downloading or available at a remote
    computer through a communications network. Minimum trend and logging
    capabilities shall be as follows:

    1.  4 trend log files each capable of logging 24 parameters.

    2.  User selectable sampling rate for each log file

    3.  Internal storage capacity of 89000 date and time stamped logged
        data points.

    4.  Logging triggered by user-defined event or new maximum or
        minimum of metered value.

    5.  Minimum and maximum of each measured parameter with date and
        time.

    6.  Alarm and event log of 500 events.

I.  The meter shall accept inputs from industry standard instrument
    transformers.

    1.  The meter shall allow potential connection to circuits up to 600
        volts AC without the use of external potential transformers.
        External potential transformer ratios up to 500,000:120 VAC
        shall be supported.

    2.  Current transformer ratios up to 10,000:5 A shall be supported.

J.  Meter shall operate with control power input from 110 to 240 VAC, 45
    -- 66 Hz.

K.  The meter shall be equipped with the following digital
    communications ports.

    1.  An RS-485 port that is capable of communicating over a twisted
        pair network using Modbus or Jbus protocol.

    2.  An RJ-45 Ethernet port that is capable of at least 10 Base T
        communications to TCP/IP-based networks using embedded HTML
        pages.

L.  Meter shall provide KYZ output pulses that can be user-programmed
    for kWH, kVARH or kVAH. The value of a pulse shall be programmable,
    allowing control of the maximum pulse rate to meet the requirements
    of the receiving equipment.

M.  Provide a separately mounted display with the following features:

    1.  High visibility alpha-numeric display to show metering data,
        min/max values, alarms, and inputs,

    2.  Pushbuttons for operator to scroll through menus and select
        information to display.

    3.  An infrared data port with proximity sensor for use with an
        optical communications interface connected to a laptop computer.

    4.  Cable connection to the meter.

N.  Manufacturer: Square D CM3350 meter with CMDVF display and ECC21
    communications module. No substitution.

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Edit the following article to match Project requirements. Adequate
instrument transformers may exist in retrofit applications. Instrument
transformers are not used with the specified single-phase meter. Delete
this article if not needed.

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4.  INSTRUMENT TRANSFORMERS

    A.  Provide current and potential transformers, conforming to NEMA
        EI 21.1 and ANSI C57.13, metering accuracy class 0.3, of
        suitable ratio and burden for specified metering.

    B.  Provide current transformers having 5 Amp secondary and a
        continuous current rating factor of not less than 1.33.

        1.  Provide two current transformers for 3-phase, 3-wire delta
            circuits. Select current transformer primary to match
            circuit overcurrent device trip rating.

        2.  Provide three current transformers for 3-phase, 4-wire wye
            circuits. Select current transformer primary to match
            circuit overcurrent device trip rating.

        3.  Current transformers for low voltage circuits (600 V and
            less) shall have 10 kV BIL. Current transformers for 13.8 kV
            circuits shall have 110 kV BIL.

        4.  Provide with window opening adequate for the conductors or
            bus bars.

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Edit the following articles to match Project requirements. Select CT to
match system voltage and current.

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5.  Manufacturer: ABB

    a.  Type CMS, through 200:5 at 600 V or less.

    b.  Type CMF, through 1200:5 at 600 V or less.

    c.  Type CMV, through 3000:5 at 600 V or less.

    d.  Type CLC, through 4000:5 at 600 V or less.

    e.  Type CLE, through 5000:5 at 600 V or less.

    f.  Type KIR-11, indoors at 13.8 kV.

    g.  Type KOR-11, outdoors at 13.8 kV.

    h.  Type KON-11, outdoors at 13.8 kV.

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Edit the following article to match Project requirements. The specified
multi-function digital meter does not require potential transformers
when connected to a 480Y/277 V system.

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C.  Provide potential transformers having 120 VAC secondary.

    1.  Provide two potential transformers for 3-phase, 3-wire delta
        circuits. Select potential transformer primary to match system
        line-to-line voltage.

    2.  Provide three potential transformers for 3-phase, 4-wire wye
        circuits. Select potential transformer primary to match system
        line-to-line voltage.

    3.  Potential transformers for low voltage circuits (600 V and less)
        shall have 10 kV BIL. Potential transformers for 13.8 kV
        circuits shall have 110 kV BIL.

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Edit the following article to match Project requirements. Select PT to
match system voltage.

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4.  Manufacturer: ABB

    a.  Type VIZ-11 with 2 primary fuses for 13.8 kV system indoors.

    b.  Type VOY-11 for 13.8 kV system outdoors.

    c.  Type PPW for 480 V system.

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Edit the following article to match Project requirements. Adequate test
switches and plugs may exist in retrofit applications. Test switches and
plugs are not required with the specified single-phase meter. Delete
this article if not needed.

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5.  TEST SWITCHES AND PLUGS

    A.  Provide semi-flush mounted test switches in meter potential and
        current circuits to facilitate testing of the meter installation
        and also external connection of additional portable metering
        equipment.

    B.  Provide test switches that comply with ANSI C12.9 and
        automatically short circuit current transformer circuits when
        the switches are opened preparatory to inserting the test plug.

    C.  Test switch shall have potential and shorting type current poles
        as follows:

        1.  3 wire delta systems: 3 potential poles and 4 shorting type
            current poles.

        2.  4 wire wye systems: 4 potential poles and 6 shorting type
            current poles.

    D.  Provide plastic cover for each test switch.

    E.  Provide matching test plugs designed for in-service testing.

    F.  Manufacturers: States "Type FMS".

        1.  3 wire delta systems: States FMS-07C

        2.  4 wire wye systems: States FMS-10C

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Edit the following article to match Project requirements. Delete if
there is no three-phase metering.

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6.  POTENTIAL CIRCUIT FUSES

    A.  Provide UL Class CC, time-delay, 600 V, 3-ampere fuses to
        protect each potential lead to the meter.

        1.  Provide each fuse with a cover having a blown-fuse
            indicator.

        2.  Manufacturer: Bussman "Type FNQ-R fuses, BC Series fuse
            blocks, and SAMI-7I fuse covers."

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Edit the following article to match Project requirements. Delete on
low-voltage systems.

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B.  For indoor medium-voltage metering installations, protect the
    primary of each potential transformer with indoor, current-limiting,
    1/2 Amp, 14,400 V fuses having blown fuse indication. Manufacturer:
    S&C "Fusistor."

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Edit the following article to match Project requirements. Delete on
low-voltage systems.

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C.  For outdoor medium-voltage metering installations, protect the
    primary of each potential transformer with outdoor, 1 Amp, 14,400 V
    power fuses. Manufacturer: S&C "SMD-20 with SMU-20 fuse unit".

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7.  WIRING AND TERMINATIONS

    A.  Use 12 AWG, THHN-THWN stranded copper, for current transformer
        secondary circuits that are less than 50 ft. Use 10 AWG,
        THHN-THWN stranded copper, for current transformer secondary
        circuits that are more than 50 ft.

    B.  Use 12 AWG, Type THHN-THWN, stranded copper, for potential
        transformer secondary circuits.

    C.  Use crimp-on, nylon insulated, insulation grip, brazed seam
        terminals for instrument wiring as follows:

        1.  Use ring tongue terminals for nutted studs. Manufacturer:
            Burndy "Type TN"

        2.  Use flanged fork terminals for barrier terminal strips.
            Manufacturer: Burndy "YAE-Z".

        3.  Use pin terminals for DIN type terminal blocks.
            Manufacturer: 3M "MNG-P".

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Edit the following article to match Project requirements. Use meter
cabinets for retrofit applications or where there is insufficient space
to mount the meter and test switches in the service entrance panelboard
or switchgear. Meter cabinet is not needed for a single-phase,
socket-mounted meter. Delete article if not needed.

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8.  METER CABINETS

    A.  Provide a metal current transformer (CT) cabinet with hinged
        door to house the meter test switches, fuse blocks, \[potential
        transformers,\] and current transformers.

        1.  Minimum cabinet size: 36" high, 30" wide, 11" deep.

        2.  Manufacturer: Hoffman A-363011HCT

    B.  Provide a meter cabinet with hinged door to house the meter
        module, display module, communications interfaces, and
        accessories.

        1.  Minimum cabinet size: 12" high, 12" wide, 6" deep.

        2.  Manufacturer: Hoffman A-12R126HCLO.

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3.  EXECUTION

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Delete the following article when existing construction is not affected.

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1.  EXISTING WORK

    A.  Remove abandoned meters, including associated cabinets,
        instrument transformers and test blocks.

    B.  Maintain access to existing meters and other installations
        remaining active and requiring access. Modify installation or
        provide access panel.

    C.  Clean and repair existing meters and associated cabinets,
        instrument transformers and test blocks to remain or to be
        reinstalled.

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1.  EXAMINATION

    A.  Examine surfaces to receive meters and associated cabinets,
        instrument transformers and test blocks for compliance with
        installation tolerances and other conditions affecting
        performance of the raceway system. Do not proceed with
        installation until unsatisfactory conditions have been
        corrected.

2.  INSTALLATION

    A.  Install metering equipment according to manufacturer\'s
        instructions. Have the manufacturer's installation instructions
        available at the construction site.

    B.  Tighten electrical connectors and terminals according to
        manufacturer\'s published torque‑tightening values. Where
        manufacturer\'s torque values are not furnished, use those
        specified in UL 486A.

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Edit the following article to match project requirements.

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C.  Identify meter, \[test switches,\] \[instrument transformers,\] and
    meter wiring according to Section 26 0553, Identification for
    Electrical Systems. \[Install voltage and arc-flash warning labels
    on cover of instrument transformer cabinet.\]

D.  Ground meter and enclosure according to manufacturer's instructions
    and Section 26 0526, Grounding and Bonding for Electrical Systems.

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Edit the following article to match project requirements.

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E.  Support meter, \[meter base,\] \[meter cabinet,\] \[instrument
    transformers\] in accordance with Section 26 0529, Hangers and
    Supports for Electrical Systems, and the NEC.

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Use the following article when instrument transformers will NOT be
installed within a service entrance switchboard or switchgear assembly.
Provide sufficient space adjacent to the service entrance equipment for
the CT cabinet and meter cabinet. Delete this article if not required.

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F.  Install CT cabinet and meter cabinet adjacent to service entrance
    equipment.

    1.  Install 3/4" plywood backboard painted with two coats of
        fire-retardant paint in the CT cabinet.

    2.  Mount current transformers on plywood backboard in the CT
        cabinet; position transformers to minimize stress from power
        conductors.

    3.  Mount potential circuit fuse blocks on plywood backboard in the
        CT cabinet.

    4.  Recess mount meter test switches in current transformer CT
        cabinet door.

    5.  Locate meter cabinet so display is approximately 60 inches above
        the floor.

    6.  Install meter module, communications interfaces, and accessories
        on DIN rail in meter cabinet.

    7.  Mount meter display on meter cabinet door.

    8.  Interconnect metering components as indicated on the Drawings.

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Use the following article when instrument transformers will be installed
within a service entrance switchboard or switchgear assembly. Coordinate
this article with Section 26 2300 -- Low-Voltage Switchgear or Section
26 2413 -- Switchboards as applicable. Delete this article if not
required.

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G.  Install metering components within the electrical service entrance
    switchgear. Refer to \[Section 26 2300 -- Low-Voltage
    Switchgear\]\[Section 26 2413 -- Switchboards\].

    1.  Install potential transformers and associated potential fuses in
        dedicated potential transformer compartment.

    2.  Install current transformers on main bus in accordance with
        switchgear manufacturer's standard details.

    3.  Install meter in a dedicated metering compartment.

    4.  Recess mount meter test switches in switchgear metering
        compartment door.

    5.  Locate meter display on switchgear metering compartment door
        approximately 60 inches above the floor.

    6.  Interconnect metering components as indicated on the Drawings.

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Delete the following four articles if a single-phase, socket-mounted
meter is used.

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H.  Provide control power to meter in accordance with the manufacturer's
    instructions.

    1.  Use a dedicated, fuse-protected, 120 volt circuit or a
        dedicated, fuse-protected, control power transformer if
        potential transformers are required for the metering voltage
        inputs.

    2.  Control power may be derived from the fuse-protected metering
        voltage inputs when potential transformers are not required.

I.  Wire current and potential leads through test switch.

    1.  Install fuse protection in the potential leads on the line side
        of the test switch.

    2.  Use shorting-type switches for the current transformer leads.

J.  Provide communications connection between the building
    telecommunications system and the Ethernet port on the meter.

    1.  Provide telecommunications outlet within the electrical room and
        as close as practical to the metering equipment or enclosure.

    2.  Provide conduit pathway for communications cables within the
        switchgear or switchboard enclosure and to within 1 ft of the
        telecommunications outlet.

    3.  Provide suitable communications cables and terminations.

    4.  Connect meter to telecommunications outlet.

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3.  FIELD QUALITY CONTROL

    A.  Inspect accessible components for cleanliness, mechanical, and
        electrical integrity, and for presence of damage or
        deterioration before energizing.

    B.  The LANL Support Services Subcontractor (Utilities Dept.) will
        inspect, test, program, and adjust the meter, communication
        wiring, meter wiring, and communications card.

    C.  Correct deficiencies in material, wiring, or installation that
        may be discovered.

    D.  After completing installation, cleaning, and testing, touch up
        scratches and mars on finish to match original finish.

END OF SECTION

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Do not delete the following reference information.

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FOR LANL USE ONLY

This project specification is based on LANL Master Specification 26 2713
Rev. 1, dated November 15, 2007.