Attachment 4 UFGS 26 24 13.pdf

USACE / NAVFAC / AFCEC / NASA UFGS- 26 24 13 ( May 2015) Change 1 - 08/ 17 Pr epar i ng Act i v i t y: NAVFAC

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2021

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 24 13

SWITCHBOARDS

05/ 15, CHG 1: 08/ 17

PART 1 GENERAL

1.1 REFERENCES

1.2 RELATED REQUIREMENTS

1.3 DEFINITIONS

1.4 SUBMITTALS

1.5 QUALITY ASSURANCE

1.5.1 Product Data

1.5.2 Switchboard Drawings

1.5.3 Regulatory Requirements

1.5.4 Standard Products

1.5.4.1 Alternative Qualifications

1.5.4.2 Material and Equipment Manufacturing Date

1.6 MAINTENANCE

1.6.1 Switchboard Operation and Maintenance Data

1.6.2 Assembled Operation and Maintenance Manuals

1.6.3 Spare Parts

1.7 WARRANTY

PART 2 PRODUCTS

2.1 PRODUCT COORDINATION

2.2 SWITCHBOARD

2.2.1 Ratings

2.2.2 Construction

2.2.2.1 Enclosure

2.2.2.2 Bus Bars

2.2.2.3 Main Section

2.2.2.4 Distribution Sections

2.2.2.5 Auxiliary Sections

2.2.2.6 Handles

2.2.3 Protective Device

2.2.3.1 Power Circuit Breaker

2.2.3.2 Insulated-Case Breaker

2.2.3.3 Molded-Case Circuit Breaker

2.2.3.4 Fusible Switches

SECTION 26 24 13 Page 1

2.2.3.5 Integral Combination Breaker and Current-Limiting Fuses

2.2.4 Drawout Breakers

2.2.5 Electronic Trip Units

2.2.6 Metering

2.2.6.1 Digital Meters

2.2.6.2 Electronic Watthour Meter

2.2.6.3 Submetering

2.2.7 Transformer

2.2.8 Heaters

2.2.9 Terminal Boards

2.2.10 Wire Marking

2.3 MANUFACTURER'S NAMEPLATE

2.4 FIELD FABRICATED NAMEPLATES

2.5 SOURCE QUALITY CONTROL

2.5.1 Equipment Test Schedule

2.5.2 Switchboard Design Tests

2.5.2.1 Design Tests

2.5.2.2 Additional Design Tests

2.5.3 Switchboard Production Tests

2.5.4 Cybersecurity Equipment Certification

2.6 COORDINATED POWER SYSTEM PROTECTION

2.7 ARC FLASH WARNING LABEL

2.8 SERVICE ENTRANCE AVAILABLE FAULT CURRENT LABEL

2.9 MIMIC BUS LABELING

PART 3 EXECUTION

3.1 INSTALLATION

3.2 GROUNDING

3.2.1 Grounding Electrodes

3.2.2 Equipment Grounding

3.2.3 Connections

3.2.4 Grounding and Bonding Equipment

3.3 INSTALLATION OF EQUIPMENT AND ASSEMBLIES

3.3.1 Switchboard

3.3.2 Meters and Instrument Transformers

3.3.3 Field Applied Painting

3.3.4 Galvanizing Repair

3.3.5 Field Fabricated Nameplate Mounting

3.4 FOUNDATION FOR EQUIPMENT AND ASSEMBLIES

3.4.1 Exterior Location

3.4.2 Interior Location

3.5 FIELD QUALITY CONTROL

3.5.1 Performance of Acceptance Checks and Tests

3.5.1.1 Switchboard Assemblies

3.5.1.2 Circuit Breakers - Low Voltage - Power

3.5.1.3 Circuit Breakers

3.5.1.4 Current Transformers

3.5.1.5 Metering and Instrumentation

3.5.1.6 Grounding System

3.5.1.7 Cybersecurity Installation Certification

3.5.2 Follow-Up Verification

-- End of Section Table of Contents --

SECTION 26 24 13 Page 2

USACE / NAVFAC / AFCEC / NASA UFGS- 26 24 13 ( May 2015) Change 1 - 08/ 17 Pr epar i ng Act i v i t y: NAVFAC

UNI FI ED FACI LI TI ES GUI DE SPECI FI CATI ONS

Ref er ences ar e i n agr eement wi t h UMRL dat ed Januar y 2021

SECTION 26 24 13

SWITCHBOARDS

05/ 15, CHG 1: 08/ 17

NOTE: Thi s i s a new gui de speci f i cat i on t hat , i n par t , r epl aces 26 23 00, SWI TCHBOARDS AND SWI TCHGEAR. The or i gi nal gui de speci f i cat i on was separ at ed i nt o t wo speci f i cat i ons: 26 23 00, LOW- VOLTAGE SWI TCHGEAR, and 26 24 13, SWI TCHBOARDS.

Thi s gui de speci f i cat i on cover s t he r equi r ement s f or f r ee st andi ng deadf r ont swi t chboar d assembl i es r at ed 6000 amper es or l ess, 600 vol t s or l ess. Thi s gui de speci f i cat i on i s i nt ended f or al t er nat i ng cur r ent appl i cat i ons; addi t i onal edi t i ng wi l l be necessar y t o t ai l or i t f or di r ect cur r ent appl i cat i ons.

Per UFC 3- 520- 01, speci f y swi t chboar ds f or ser vi ce ent r ance equi pment when t he ser vi ce i s 1200 amper es or l ar ger , and br anch and f eeder c i r cui t s ar e combi ned si zes f r om 20 amper es up t o 800 amper es.

Ut i l i ze swi t chboar ds t hr oughout t he di st r i but i on syst em wher e f eeder s ar e 1200 amper es or l ar ger .

Speci f y met al - encl osed swi t chgear i n accor dance wi t h Section 26 23 00 LOW- VOLTAGE SWI TCHGEAR f or ser vi ce ent r ance equi pment onl y when t he ser vi ce i s 1200 amper es or l ar ger , and al l br anch and f eeder c i r cui t s ar e l ar ge, such as 600 amper es or 800 amper es each. Use Sect i on 26 20 00 I NTERI OR DI STRI BUTI ON SYSTEM, f or power and di st r i but i on panel boar ds r at ed l ess t han 1200 amper es.

When t he pr oposed swi t chboar d i s connect ed t o a secondar y uni t subst at i on, coor di nat e wi t h Sect i on

26 11 16 SECONDARY UNI T SUBSTATI ONS.

Thi s speci f i cat i on i s not i nt ended t o be used f or gener at or cont r ol swi t chboar ds wi t hout ext ensi ve modi f i cat i on and coor di nat i on wi t h appl i cabl e engi ne- gener at or set gui de speci f i cat i ons.

Adher e t o UFC 1-300-02 Uni f i ed Faci l i t i es Gui de Speci f i cat i ons ( UFGS) For mat St andar d when edi t i ng t hi s gui de speci f i cat i on or pr epar i ng new pr oj ect speci f i cat i on sect i ons. Edi t t hi s gui de

SECTION 26 24 13 Page 3 speci f i cat i on f or pr oj ect speci f i c r equi r ement s by addi ng, del et i ng, or r evi s i ng t ext . For br acket ed i t ems, choose appl i cabl e i t em( s) or i nser t appr opr i at e i nf or mat i on.

Remove i nf or mat i on and r equi r ement s not r equi r ed i n r espect i ve pr oj ect , whet her or not br acket s ar e present.

Comment s, suggest i ons and r ecommended changes f or t hi s gui de speci f i cat i on ar e wel come and shoul d be submi t t ed as a Criteria Change Request (CCR) .

NOTE: Ver i f y t hat t he f ol l owi ng i nf or mat i on i s i ndi cat ed on t he pr oj ect dr awi ngs:

1. Si ngl e- l i ne di agr am showi ng buses and i nt er r upt i ng devi ces wi t h i nt er r upt i ng capaci t i es;

cur r ent t r ansf or mer s wi t h r at i ngs; i nst r ument s and met er s r equi r ed; and descr i pt i on of i nst r ument s and meters.

2. Locat i on, space avai l abl e, ar r angement , and el evat i ons of swi t chboar ds.

3. Gr oundi ng pl an.

4. Type and number of cabl es, s i ze of conduct or s f or each power c i r cui t , and poi nt of ent r y ( t op or bottom).

5. Speci al condi t i ons, such as al t i t ude, t emper at ur e and humi di t y, exposur e t o f umes, vapor s, dust , and gases; and sei smi c r equi r ement s.

6. Ar c f l ash l abel r equi r ement s. Downl oad t he l abel f or mat at http://www.wbdg.org/ffc/dod/unified-facilities-guide-specifications-ufgs/forms-graphics-tables

7. Avai l abl e f aul t cur r ent l abel f or ser vi ce ent r ance equi pment . Downl oad t he l abel f or mat at http://www.wbdg.org/ffc/dod/unified-facilities-guide-specifications-ufgs/forms-graphics-tables

8. Locat i ons wi t h 100 per cent r at ed ci r cui t breakers.

9. Locat i ons wi t h ar c ener gy r educt i on met hods specified.

PART 1 GENERAL

1.1 REFERENCES

NOTE: Thi s par agr aph i s used t o l i s t t he publ i cat i ons c i t ed i n t he t ext of t he gui de

SECTION 26 24 13 Page 4 speci f i cat i on. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by basi c desi gnat i on onl y and l i s t ed i n t hi s par agr aph by or gani zat i on, desi gnat i on, dat e, and t i t l e.

Use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e when you add a Ref er ence I dent i f i er ( RI D) out si de of t he Sect i on' s Ref er ence Ar t i c l e t o aut omat i cal l y pl ace t he r ef er ence i n t he Ref er ence Ar t i c l e. Al so use t he Ref er ence Wi zar d' s Check Ref er ence f eat ur e t o updat e t he i ssue dat es.

Ref er ences not used i n t he t ext wi l l aut omat i cal l y be del et ed f r om t hi s sect i on of t he pr oj ect speci f i cat i on when you choose t o r econci l e r ef er ences i n t he publ i sh pr i nt pr ocess.

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI C12.1 ((2014; Errata 2016) Electric Meters - Code for Electricity Metering

AMERICAN SOCIETY OF HEATING, REFRIGERATING AND AIR-CONDITIONING

ENGINEERS (ASHRAE)

ASHRAE 90.1 - IP (2013) Energy Standard for Buildings Except Low-Rise Residential Buildings

ASTM INTERNATIONAL (ASTM)

ASTM A123/A123M (2017) Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products

ASTM A153/A153M (2016a) Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A240/A240M (2020) Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A653/A653M (2020) Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process

ASTM A780/A780M (2020) Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM D149 (2020) Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical

SECTION 26 24 13 Page 5

Insulating Materials at Commercial Power Frequencies

ASTM D709 (2017) Standard Specification for Laminated Thermosetting Materials

ASTM D1535 (2014; R 2018) Standard Practice for Specifying Color by the Munsell System

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 81 (2012) Guide for Measuring Earth Resistivity, Ground Impedance, and Earth Surface Potentials of a Ground System

IEEE 100 (2000; Archived) The Authoritative Dictionary of IEEE Standards Terms

IEEE C2 (2017; Errata 1-2 2017; INT 1 2017) National Electrical Safety Code

IEEE C37.13 (2015) Standard for Low-Voltage AC Power Circuit Breakers Used in Enclosures

IEEE C37.90.1 (2013) Standard for Surge Withstand Capability (SWC) Tests for Relays and Relay Systems Associated with Electric Power Apparatus

IEEE C57.12.28 (2014) Standard for Pad-Mounted Equipment

- Enclosure Integrity

IEEE C57.12.29 (2014) Standard for Pad-Mounted Equipment

- Enclosure Integrity for Coastal Environments

IEEE C57.13 (2016) Requirements for Instrument Transformers

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2017; Errata 2017) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

ANSI/NEMA PB 2.1 (2013) General Instructions for Proper Handling, Installation, Operation and Maintenance of Deadfront Distribution Switchboards Rated 600 V or Less

NEMA ICS 6 (1993; R 2016) Industrial Control and Systems: Enclosures

NEMA PB 2 (2011) Deadfront Distribution Switchboards

NEMA ST 20 (2014) Dry-Type Transformers for General Applications

SECTION 26 24 13 Page 6

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2020; ERTA 20-1 2020; ERTA 20-2 2020; TIA

20-1; TIA 20-2; TIA 20-3; TIA 20-4)

National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 198M (2018) UL Standard for Mine-Duty Fuses

UL 467 (2013; Reprint Jun 2017) UL Standard for Safety Grounding and Bonding Equipment

UL 489 (2016) UL Standard for Safety Molded-Case Circuit Breakers, Molded-Case Switches and Circuit-Breaker Enclosures

UL 891 (2005; Reprint Oct 2012) Switchboards

UL 4248-1 (2017) UL Standard for Safety Fuseholders

- Part 1: General Requirements

UL 4248-12 (2018) UL Standard for Safety Fuseholders

- Part 12: Class R

1.2 RELATED REQUIREMENTS

NOTE: I ncl ude Sect i on 26 08 00 APPARATUS I NSPECTI ON AND TESTI NG on al l pr oj ect s i nvol v i ng medi um vol t age and speci al i zed power di st r i but i on equi pment

Section 26 08 00 APPARATUS INSPECTION AND TESTING applies to this section, with the additions and modifications specified herein.

1.3 DEFINITIONS

Unless otherwise specified or indicated, electrical and electronics terms used in these specifications, and on the drawings, are as defined in

IEEE 100 .

1.4 SUBMITTALS

NOTE: Revi ew Submi t t al Descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t , and cor r espondi ng submi t t al i t ems i n t he t ext , t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect . The Gui de Speci f i cat i on t echni cal edi t or s have cl assi f i ed t hose i t ems t hat r equi r e Gover nment appr oval , due t o t hei r compl exi t y or cr i t i cal i t y, wi t h a " G. " Gener al l y, ot her submi t t al i t ems can be r evi ewed by t he Cont r act or ' s Qual i t y Cont r ol Syst em. Onl y add a " G" t o an i t em i f t he submi t t al i s suf f i c i ent l y i mpor t ant or compl ex i n cont ext of t he pr oj ect .

SECTION 26 24 13 Page 7

For Ar my pr oj ect s, f i l l i n t he empt y br acket s f ol l owi ng t he " G" c l assi f i cat i on, wi t h a code of up t o t hr ee char act er s t o i ndi cat e t he appr ovi ng aut hor i t y. Codes f or Ar my pr oj ect s usi ng t he Resi dent Management Syst em ( RMS) ar e: " AE" f or Ar chi t ect - Engi neer ; " DO" f or Di st r i ct Of f i ce ( Engi neer i ng Di v i s i on or ot her or gani zat i on i n t he Di st r i ct Of f i ce) ; " AO" f or Ar ea Of f i ce; " RO" f or Resi dent Of f i ce; and " PO" f or Pr oj ect Of f i ce. Codes f ol l owi ng t he " G" t ypi cal l y ar e not used f or Navy, Ai r For ce, and NASA pr oj ect s.

The " S" c l assi f i cat i on i ndi cat es submi t t al s r equi r ed as pr oof of compl i ance f or sust ai nabi l i t y Gui di ng Pr i nci pl es Val i dat i on or Thi r d Par t y Cer t i f i cat i on and as descr i bed i n Sect i on 01 33 00 SUBMI TTAL

PROCEDURES.

Choose t he f i r st br acket ed i t em f or Navy, Ai r For ce, and NASA pr oj ect s, or choose t he second br acket ed i t em f or Ar my pr oj ect s.

Government approval is required for submittals with a "G" or "S" classification. Submittals not having a "G" or "S" classification are [for Contractor Quality Control approval.][for information only. When used, a code following the "G" classification identifies the office that will review the submittal for the Government.] Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Switchboard Drawings ; G[, [_____]]

SD-03 Product Data

Switchboard ; G[, [_____]]

SD-06 Test Reports

Switchboard Design Tests ; G[, [_____]]

Switchboard Production Tests ; G[, [_____]]

Acceptance Checks and Tests ; G[, [_____]]

SD-07 Certificates

Cybersecurity Equipment Certification ; G[, [_____]]

Submit certification indicating conformance with the paragraph

CYBERSECURITY EQUIPMENT CERTIFICATION.

Cybersecurity Installation Certification ; G[, [_____]]

Submit certification indicating conformance with the paragraph

CYBERSECURITY INSTALLATION CERTIFICATION.

SD-10 Operation and Maintenance Data

SECTION 26 24 13 Page 8

Switchboard Operation and Maintenance , Data Package 5; G[, [_____]]

SD-11 Closeout Submittals

NOTE: Sel ect " Request f or Set t i ngs" bel ow i f pr ot ect i ve devi ce set t i ngs wi l l be gover nment f ur ni shed. Sel ect " Requi r ed Set t i ngs" bel ow i f pr ot ect i ve devi ce set t i ngs ar e f ur ni shed by t he Desi gner of Recor d. Coor di nat e wi t h t he per son devel opi ng t he Di v i s i on 1 Sect i ons and ensur e t hat Di v i s i on 1 Sect i ons i dent i f y t he per son r esponsi bl e f or pr ovi di ng t he f i nal pr ot ect i ve devi ce set t i ngs f or desi gn/ bui l d ver sus desi gn/ bi d/ bui l d pr oj ect s.

Do not r el y on t he manuf act ur er ' s def aul t set t i ngs.

Assembled Operation and Maintenance Manuals ; G[, [_____]]

Equipment Test Schedule ; G[, [_____]]

[ Request for Settings ; G[, [_____]]

][ Required Settings ; G[, [_____]]

NOTE: NFPA 70 Ar t i c l e 110. 24 r equi r es an avai l abl e f aul t cur r ent l abel t o be appl i ed at t he ser vi ce ent r ance. Sel ect " Avai l abl e Faul t Cur r ent Label " bel ow i f t he swi t chboar d i s par t of t he ser vi ce ent r ance equi pment . Coor di nat e wi t h t he per son devel opi ng t he Di v i s i on 1 Sect i ons and ensur e t hat Di v i s i on 1 Sect i ons i dent i f y t he per son r esponsi bl e f or pr ovi di ng t he shor t c i r cui t cal cul at i on f or t he pr oj ect . Thi s may var y f or desi gn/ bui l d ver sus desi gn/ bi d/ bui l d pr oj ect s.

[ Service Entrance Available Fault Current Label ; G[, [_____]]

] 1.5 QUALITY ASSURANCE

1.5.1 Product Data

Include manufacturer's information on each submittal for each component, device and accessory provided with the switchboard including:

a. Circuit breaker type, interrupting rating, and trip devices, including available settings.

b. Manufacturer's instruction manuals and published time-current curves (in electronic format) of the main secondary breaker and largest secondary feeder device.

1.5.2 Switchboard Drawings

Include wiring diagrams and installation details of equipment indicating proposed location, layout and arrangement, control panels, accessories, SECTION 26 24 13 Page 9 piping, ductwork, and other items that must be shown to ensure a coordinated installation. Identify circuit terminals on wiring diagrams and indicate the internal wiring for each item of equipment and the interconnection between each item of equipment. Indicate on the drawings adequate clearance for operation, maintenance, and replacement of operating equipment devices. Include the nameplate data, size, and capacity on submittal. Also include applicable federal, military, industry, and technical society publication references on submittals.

Include the following:

a. One-line diagram including breakers[, fuses][, current transformers, and meters].

b. Outline drawings including front elevation, section views, footprint, and overall dimensions.

c. Bus configuration including dimensions and ampere ratings of bus bars.

d. Markings and NEMA nameplate data[, including fuse information (manufacturer's name, catalog number, and ratings)].

e. Circuit breaker type, interrupting rating, and trip devices, including available settings.

f. Wiring diagrams and elementary diagrams with terminals identified, and indicating prewired interconnections between items of equipment and the interconnection between the items.

g. Manufacturer's instruction manuals and published time-current curves (in electronic format) of the main secondary breaker and largest secondary feeder device. Use this information (designer of record) to provide breaker settings that ensures protection and coordination are achieved. [For Navy installations, provide electronic format curves using SKM's Power Tools for Windows device library electronic format or EasyPower device library format depending on installation modeling software requirements.]

NOTE: I f sel ect i ng pr ovi s i ons f or f ut ur e expansi on, ensur e t he f aci l i t y and r oom si ze i s adequat e f or t he addi t i onal equi pment .

[ h. Provisions for future expansion by adding switchboard sections.

] 1.5.3 Regulatory Requirements

In each of the publications referred to herein, consider the advisory provisions to be mandatory, as though the word, "shall" or "must" had been substituted for "should" wherever it appears. Interpret references in these publications to the "authority having jurisdiction," or words of similar meaning, to mean the Contracting Officer. Provide equipment, materials, installation, and workmanship in accordance with the mandatory and advisory provisions of NFPA 70 unless more stringent requirements are specified or indicated.

1.5.4 Standard Products

Provide materials and equipment that are products of manufacturers

SECTION 26 24 13 Page 10 regularly engaged in the production of such products which are of equal material, design and workmanship, and:

a. Have been in satisfactory commercial or industrial use for 2 years prior to bid opening including applications of equipment and materials under similar circumstances and of similar size.

b. Have been on sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 2-year period.

c. Where two or more items of the same class of equipment are required, provide products of a single manufacturer; however, the component parts of the item need not be the products of the same manufacturer unless stated in this section.

1.5.4.1 Alternative Qualifications

Products having less than a 2-year field service record will be acceptable if a certified record of satisfactory field operation for not less than 6000 hours, exclusive of the manufacturers' factory or laboratory tests, is furnished.

1.5.4.2 Material and Equipment Manufacturing Date

Products manufactured more than 1 year prior to date of delivery to site are not acceptable.

1.6 MAINTENANCE

1.6.1 Switchboard Operation and Maintenance Data

Submit Operation and Maintenance Manuals in accordance with Section

01 78 23 OPERATION AND MAINTENANCE DATA.

1.6.2 Assembled Operation and Maintenance Manuals

Assemble and securely bind manuals in durable, hard covered, water resistant binders. Assemble and index the manuals in the following order with a table of contents:

a. Manufacturer's O&M information required by the paragraph SD-10, OPERATION AND MAINTENANCE DATA.

b. Catalog data required by the paragraph SD-03, PRODUCT DATA.

c. Drawings required by the paragraph SD-02, SHOP DRAWINGS.

d. Prices for spare parts and supply list.

[ e. Information on metering.

] f. Design test reports.

g. Production test reports.

[ 1.6.3 Spare Parts

NOTE: Do not use t hi s par agr aph f or Navy pr oj ect s.

SECTION 26 24 13 Page 11

For ot her ser vi ces, coor di nat e wi t h Cont r act i ng Of f i cer on whet her t hi s par agr aph can be i ncl uded.

Edi t as r equi r ed i f addi t i onal spar e par t s ar e r equi r ed f or a speci f i c pr oj ect .

Provide spare parts as specified below. Provide spare parts that are of the same material and workmanship, meet the same requirements, and are interchangeable with the corresponding original parts furnished.

a. Quantity 2 - Fuses of each type and size.

[ b. [_____]

] ] 1.7 WARRANTY

Provide equipment items that are supported by service organizations reasonably convenient to the equipment installation in order to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

PART 2 PRODUCTS

2.1 PRODUCT COORDINATION

Products and materials not considered to be switchboards and related accessories are specified in Section 33 71 02 UNDERGROUND ELECTRICAL DISTRIBUTION, and Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM.

2.2 SWITCHBOARD

NEMA PB 2 and UL 891 .

2.2.1 Ratings

Provide equipment with the following ratings:

NOTE: Sel ect " as i ndi cat ed" i f t her e ar e mul t i pl e swi t chboar ds wi t h det ai l s of each shown on dr awi ngs. Most swi t chboar ds wi l l be 4- wi r e, but mi ght be a 3- wi r e desi gn f or del t a- connect ed or ungr ounded syst ems.

a. Voltage rating: [480Y/277][208Y/120][_____] volts AC, [three-phase, [3][4]-wire][as indicated].

b. Continuous current rating of the main bus: [_____ amperes][as indicated].

c. Short-circuit current rating: [_____ rms symmetrical amperes][as indicated].

d. UL listed and labeled[ as service entrance equipment].

SECTION 26 24 13 Page 12

2.2.2 Construction

NOTE: Edi t t he sel ect i on opt i ons bel ow as needed f or t he i nt ended pr oj ect conf i gur at i on. Rear al i gned swi t chboar ds ar e l i kel y t he l owest cost desi gn pr act i ce. Fr ont and r ear al i gned swi t chboar ds pr ovi de a mor e appeal i ng i nst al l at i on.

Do not speci f y r ear connect i ons i f t he swi t chboar d wi l l be i nst al l ed agai nst a wal l .

Provide the following:

a. Switchboard: consisting of one or more vertical sections[ bolted together to form a rigid assembly] and [rear][front and rear] aligned[ as indicated].

b. All circuit breakers: front accessible.

[ c. Rear aligned switchboards: front accessible load connections.

][ d. Front and rear aligned switchboards[: rear accessible load connections].

] e. Where indicated, "space for future" or "space" means to include a vertical bus provided behind a blank front cover. Where indicated, "provision for future" means full hardware provided to mount a breaker suitable for the location.

f. Completely factory engineered and assembled, including protective devices and equipment indicated with necessary interconnections, instrumentation, and control wiring.

2.2.2.1 Enclosure

NOTE: Choose t he l evel of cor r osi on pr ot ect i on r equi r ed f or t he speci f i c pr oj ect l ocat i on. Most swi t chboar d pr oduct s wi l l be const r uct ed of a col d r ol l ed st eel and pai nt ed, whi ch i s adequat e f or most i ndoor l ocat i ons. Use gal vani zed st eel or st ai nl ess st eel encl osur es or bases f or out door appl i cat i ons wher e cor r osi on i s a concer n. Not al l manuf act ur er s of f er gal vani zed st eel or st ai nl ess st eel pr oduct s as a st andar d desi gn.

Sel ect I EEE C57. 12. 28 f or gal vani zed encl osur es.

Sel ect I EEE C57. 12. 29 f or st ai nl ess st eel encl osur es.

Provide the following:

a. Enclosure: NEMA ICS 6 Type [3R][1][_____][as indicated][ fabricated entirely of 12 gauge ASTM A240/A240M type 304 or 304L stainless steel].

b. Enclosure: bolted together with removable bolt-on side and[ hinged] rear covers[, and sloping roof downward toward rear].

SECTION 26 24 13 Page 13

[ c. Front[ and rear] doors: provided with[ stainless steel] padlockable vault handles with a three point catch.

][ d. Bases, frames and channels of enclosure: corrosion resistant and fabricated of[ ASTM A240/A240M type 304 or 304L stainless steel][ or][ galvanized steel].

] e. Base: includes any part of enclosure that is within 75 mm 3 inches of concrete pad.

[ f. Galvanized steel: ASTM A123/A123M , ASTM A653/A653M G90 coating, and ASTM A153/A153M , as applicable. Galvanize after fabrication where practicable.

] g. Paint color: ASTM D1535 light gray No. 61 or No. 49 over rust inhibitor.

[ h. Paint coating system: comply with[ IEEE C57.12.28 for galvanized steel][ and][ IEEE C57.12.29 for stainless steel].

] 2.2.2.2 Bus Bars

NOTE: Use copper wi t h s i l ver - pl at ed cont act sur f aces i n ext er i or or damp l ocat i ons or f or heavy mot or loads.

Del et e t he neut r al bus br acket ed opt i on i f a 3- wi r e syst em was sel ect ed.

Onl y choose t he br acket ed opt i on r equi r i ng i nsul at i onon t he bus bar s f or out door l ocat i ons wi t h a hi gh concent r at i on of ai r bor ne cont ami nant s.

Choose t hi s opt i on pr i mar i l y f or cor r osi ve and hi gh humi di t y appl i cat i ons as def i ned i n UFC 3- 501- 01.

Most manuf act ur er s wi l l t ape wr ap r at her t han appl y an i nsul at i ng s l eeve f or l ow vol t age equi pment .

Provide the following:

a. Bus bars: [copper with silver-plated contact surfaces][ or][aluminum with tin-plated contact surfaces].

(1) Phase bus bars: [uninsulated][insulated with a tape wrap or insulating sleeve providing a minimum breakdown voltage of 16,000 volts per ASTM D149].

(2) Neutral bus: rated [100][_____] percent of the main bus continuous current rating[ as indicated].

b. Make bus connections and joints with hardened steel bolts.

c. Main-bus (through bus): rated at the full ampacity of the main throughout the switchboard.

d. Minimum 6.35 mm by 50.8 mm one-quarter by 2 inch copper ground bus secured to each vertical section along the entire length of the switchboard.

SECTION 26 24 13 Page 14

2.2.2.3 Main Section

NOTE: Sel ect f r om t he opt i ons bel ow t he conf i gur at i on t o be speci f i ed. Ref er t o UFC 3- 520- 01 f or al l owed conf i gur at i ons.

Si mpl er swi t chboar ds wi l l of t en have a s i ngl e sect i on t hat cont ai ns t he mai n c i r cui t br eaker and br anch ci r cui t br eaker s, r ef er r ed t o her e as a Combi nat i on Sect i on. Lar ger swi t chboar ds can have mul t i pl e sect i ons i nvol v i ng a mai n sect i on, one or mor e di st r i but i on sect i ons, and one or mor e auxi l i ar y sect i ons.

Low- vol t age power c i r cui t br eaker s ar e not nor mal l y r equi r ed f or swi t chboar d appl i cat i ons. Ut i l i t y t r ansf or mer compar t ment s ar e r ar el y used and wi l l r equi r e addi t i onal r evi ew i f t hi s br acket ed opt i on i s sel ect ed.

Provide the main section consisting of[a combination section with[ molded-case circuit breakers] for the[ main and] branch devices as indicated][ main lugs only][ an individually mounted [fixed][ drawout][ air power circuit breaker[ with current-limiting fuses]][ insulated-case circuit breaker][ molded-case circuit breaker]][ and utility transformer compartment].

[ 2.2.2.4 Distribution Sections

NOTE: Sel ect di st r i but i on sect i ons as an opt i on i f t he mai n sect i on i s not a combi nat i on sect i on t hat i ncl udes mai n and br anch ci r cui t br eaker s.

Provide the distribution section[s] consisting of[ [individually mounted,][drawout,]][ air power circuit breakers[ with current-limiting fuses]][ insulated-case circuit breakers][ molded-case circuit breakers][ and utility transformer compartments] as indicated.

][ 2.2.2.5 Auxiliary Sections

Provide auxiliary sections consisting of indicated[ instruments,][ metering equipment,][ control equipment,][ transformer,][ and][ current transformer compartments] as indicated.

][ 2.2.2.6 Handles

Provide handles for individually mounted devices of the same design and method of external operation. Label handles prominently to indicate device ampere rating, color coded for device type. Identify ON-OFF indication by handle position and by prominent marking.

] 2.2.3 Protective Device

SECTION 26 24 13 Page 15

NOTE: Swi t chboar d shoul d be pl aced wher e t he ambi ent t emper at ur e i s l ess t han 40 deg. C.

However , shoul d t he ambi ent t emper at ur e be expect ed t o exceed 40 Deg. C, t he desi gner must r equi r e a speci al cal i br at i on f or t he c i r cui t br eaker s and conf i r m t he equi pment r at i ngs.

Pr ovi de gr ound f aul t pr ot ect i on of equi pment f or sol i dl y gr ounded wye el ect r i cal ser vi ces of mor e t han 150 vol t s t o gr ound f or each ser vi ce di sconnect r at ed 1000 amper es or mor e i n accor dance wi t h NFPA 70.

I f 48 Vdc or 125 Vdc el ect r i cal l y oper at ed ci r cui t br eaker s ar e r equi r ed, t he appr opr i at e DC cont r ol power suppl y i nf or mat i on must be added t o t he specification.

Provide[ main and] branch protective devices as indicated.

[ 2.2.3.1 Power Circuit Breaker

NOTE: Low- vol t age power c i r cui t br eaker s can be i nst al l ed i n l ar ger swi t chboar ds, but ar e not nor mal l y r equi r ed f or swi t chboar d appl i cat i ons. I f power c i r cui t br eaker s ar e sel ect ed, coor di nat e t he r at i ngs and pr ot ect i ve devi ce set t i ngs wi t h t he r at i ngs of t he swi t chboar d.

Provide the following:

a. IEEE C37.13 . [120 Vac][ electrically][ manually] operated [stationary][drawout], [unfused][fused], low-voltage power circuit breaker with a short-circuit current rating[ of [_____] rms amperes symmetrical][ as indicated] at [_____] volts.

b. Breaker frame size: [ as indicated][ [_____] amperes].

[c. Equip electrically operated breakers with motor-charged, stored-energy closing mechanism to permit rapid and safe closing of the breaker against fault currents within the short time rating of the breaker, independent of the operator's strength or effort in closing the handle.

] ][ 2.2.3.2 Insulated-Case Breaker

Provide the following:

NOTE: El ect r i cal l y oper at ed i nsul at ed- case ci r cui t br eaker s ar e r ar el y used and woul d be accompl i shed by an accessor y.

I f 100 per cent c i r cui t br eaker s ar e ut i l i zed i n t he desi gn, sel ect t he 100 per cent r at ed ci r cui t br eaker opt i on bel ow and i ndi cat e t he speci f i c l ocat i ons on

SECTION 26 24 13 Page 16 t he dr awi ngs.

a. UL 489 . UL listed and labeled,[ 100 percent rated main breaker][ standard rated branch breakers],[ electrically] [manually] operated, low voltage, insulated-case circuit breaker, with a short-circuit current rating[ of [_____] rms symmetrical amperes][ as indicated] at [_____] volts.

b. Breaker frame size: [ [_____] amperes][ as indicated].

c. Series rated circuit breakers are unacceptable.

][ 2.2.3.3 Molded-Case Circuit Breaker

Provide the following:

NOTE: I f 100 per cent c i r cui t br eaker s ar e ut i l i zed i n t he desi gn, sel ect t he 100 per cent r at ed ci r cui t br eaker opt i on bel ow and i ndi cat e t he speci f i c l ocat i ons on t he dr awi ngs.

a. UL 489 . UL listed and labeled,[ 100 percent rated main breaker][ standard rated branch breakers],[ electrically][ manually] operated, low voltage molded-case circuit breaker, with a short-circuit current rating of[ [_____] rms symmetrical amperes][ as indicated] at [_____] volts.

b. Breaker frame size: [ [_____] amperes][ as indicated].

c. Series rated circuit breakers are unacceptable.

][ 2.2.3.4 Fusible Switches

NOTE: Do not use f usi bl e over cur r ent devi ces except when necessar y t o compl y wi t h NFPA 70 r equi r ement s f or sel ect i ve coor di nat i on. Fusi bl e swi t ches ar e pr ohi bi t ed by UFC 3- 520- 01 and wer e not l i s t ed as an opt i on above. Thei r use wi l l r equi r e appr oval by t he aut hor i t y havi ng j ur i sdi ct i on t o al l ow t hei r use i n swi t chboar ds.

I f speci f i ed, sel ect UL 4248- 1 f usehol der s f or Cl ass J or L f uses. Sel ect UL 4248- 12 f or Cl ass R f uses.

Provide the following:

a. Fusible Switches: quick-make, quick-break, hinged-door type.

[ b. Switches serving as motor disconnects: horsepower rated.

] c. Fuses: current-limiting cartridge type conforming to[ UL 198M , Class J for 0 to 600 amperes and Class L for 601 to 6000 amperes][ UL 198M , Class [RK1][RK5] for 0 to 600 amperes].

SECTION 26 24 13 Page 17

d. Fuseholders: [ UL 4248-1 ][ UL 4248-12 ].

][ 2.2.3.5 Integral Combination Breaker and Current-Limiting Fuses

NOTE: Cur r ent - l i mi t i ng f uses shoul d onl y be needed i f t he avai l abl e f aul t cur r ent exceeds t he ci r cui t br eaker shor t c i r cui t r at i ng. Thi s opt i on wi l l not t ypi cal l y be sel ect ed.

Provide the following:

a. UL 489 .

b. Integral combination molded-case circuit breaker and current-limiting fuses:[ as indicated][ rated [_____] amperes] with a minimum short-circuit-current rating equal to the short-circuit-current rating of the switchboard in which the circuit breaker will be mounted.

c. Series rated circuit breakers are unacceptable.

d. Coordination of overcurrent devices of the circuit breaker and current-limiting fuses: for overloads or fault currents of relatively low value, the overcurrent device of the breaker operates to clear the fault. The current-limiting fuses operate to clear the fault for high magnitude short circuits above a predetermined value[ crossover point].

e. Housing for the current-limiting fuses: an individual molding readily removable from the front and located at the load side of the circuit breaker. If the fuse housing is removed, a blown fuse is readily evident by means of a visible indicator.

f. Removal of fuse housing causes the breaker contacts to open, and the breaker contacts can not close with the fuse housing removed. The fuse housing can not be inserted with a blown fuse or with one fuse missing. The blowing of any of the fuses causes the circuit breaker contacts to open.

] [ 2.2.4 Drawout Breakers

NOTE: Det er mi ne whi ch ci r cui t br eaker s shoul d be equi pped wi t h dr awout mechani sms.

Provide drawout breakers[ as indicated][_____]. Equip drawout breakers with disconnecting contacts, wheels, and interlocks for drawout application. Provide main, auxiliary, and control disconnecting contacts with silver-plated, multifinger, positive pressure, self-aligning type.

Provide each drawout breaker with four-position operation with each position clearly identified by an indicator on the circuit breaker front panel as follows.

a. Connected Position: Primary and secondary contacts are fully engaged. Breaker must be tripped before racking into or out of position.

b. Test Position: Primary contacts are disconnected but secondary

SECTION 26 24 13 Page 18 contacts remain fully engaged. This position allows complete test and operation of the breaker without energizing the primary circuit.

c. Disconnected Position: Primary and secondary contacts are disconnected.

d. Withdrawn (Removed) Position: Places breaker completely out of compartment, ready for removal. Removal of the breaker actuates assembly that isolates the primary stabs.

] 2.2.5 Electronic Trip Units

NOTE: Swi t chboar ds can have a var i et y of c i r cui t br eaker s i zes. Det er mi ne whi ch ci r cui t br eaker s or ot her pr ot ect i ve devi ces shoul d have el ect r oni c t r i p uni t s and edi t t he opt i ons bel ow accor di ngl y.

Smal l er c i r cui t br eaker s wi l l t ypi cal l y have t her mal - magnet i c t r i p uni t s.

Equip[ main and][ distribution] breakers[ as indicated] with a solid-state tripping system consisting of three current sensors and a microprocessor-based trip unit that provides true rms sensing adjustable time-current circuit protection. Include the following:

a. Current sensors ampere rating: [ as indicated][ [_____] amperes][ the same as the breaker frame rating].

b. Trip unit ampere rating: [ as indicated][ [_____] amperes].

[ c. Ground fault protection: [ as indicated][ zero sequence sensing][ residual type sensing].

][ d. Electronic trip units: provide additional features[ as indicated]:

NOTE: I n t he i t ems bel ow, choose t he br acket ed i t em " mai n" when t he i t em onl y appl i es t o t he mai n breaker.

Pr ovi de gr ound f aul t pr ot ect i on of equi pment f or sol i dl y gr ounded wye el ect r i cal ser vi ces of mor e t han 150 vol t s t o gr ound f or each ser vi ce di sconnect r at ed 1000 amper es or mor e i n accor dance wi t h NFPA 70.

NFPA 70 r equi r es ar c ener gy r educt i on wher e t he hi ghest cont i nuous cur r ent t r i p set t i ng f or whi ch t he act ual over cur r ent devi ce i nst al l ed i n a c i r cui t br eaker i s r at ed or can be adj ust ed t o 1200 amper es or hi gher . The opt i on i dent i f i ed bel ow i s based on an ener gy- r educi ng mai nt enance swi t ch. Add t he addi t i onal appr opr i at e i nf or mat i on i f ot her met hods such as di f f er ent i al r el ayi ng or an act i ve ar c f l ash mi t i gat i on syst em ar e i ncl uded. I dent i f y l ocat i ons of al t er nat e ar c ener gy r educt i on met hods i n t he design.

SECTION 26 24 13 Page 19

[ (1) [Indicated ]Breakers: include long delay pick-up and time settings, and LED indication of cause of circuit breaker trip.

][ (2) Main breakers: include[ short delay pick-up and time settings][ and][, instantaneous settings][ and][ ground fault settings][ as indicated].

][ (3) Distribution breakers: include[ short delay pick-up and time settings][, instantaneous settings][, and ground fault settings][ as indicated].

][ (4) [Main ]Breakers: include a digital display for phase and ground current.

][ (5) [Main ]Breakers: include a digital display for watts, vars, VA, kWh, kvarh, and kVAh.

][ (6) [Main ]Breakers: include a digital display for phase voltage, and percent THD voltage and current.

][ (7) [Main ]Breakers: include provisions for communication via a network twisted pair cable for remote monitoring and control.

Provide the following communications protocol:[DNP3][Modbus][IEC 61850].

][ (8) For electronic trip units that are rated for or can be adjusted to 1,200 amperes or higher, provide arc energy reduction capability with an energy-reducing maintenance switch with local status indicator.

] [ 2.2.6 Metering

NOTE: When Sect i on 23 09 00 I NSTRUMENTATI ON AND CONTROL FOR HVAC i s used, coor di nat e met er requirements.

[ 2.2.6.1 Digital Meters

NOTE: Di gi t al met er i ng i ncor por at es newer t echnol ogy and pr ovi des addi t i onal i nf or mat i on, of t en wi t hout addi t i onal cost . A cont r ol power t r ansf or mer ( 115 V or 130 V) i s usual l y r equi r ed wi t h t hi s t ype of metering.

Di gi t al met er s ar e cont i nual l y i mpr ovi ng. The di spl ay capabi l i t y can be a s i mpl e di spl ay of numer i cal val ues or a mor e sophi st i cat ed di spl ay showi ng wavef or ms. Over - speci f i cat i on of t he met er physi cal or sof t war e char act er i st i cs wi l l l i kel y r esul t i n speci f i cat i on of an ol der obsol et e met er .

IEEE C37.90.1 for surge withstand. Provide true rms, plus/minus one percent accuracy, programmable, microprocessor-based meter enclosed in a sealed case with the following features.

SECTION 26 24 13 Page 20

a. Display capability:

[ (1) Multi-Function Meter: Display a selected phase to neutral voltage, phase to phase voltage, percent phase to neutral voltage THD, percent phase to phase voltage THD; a selected phase current, neutral current, percent phase current THD, percent neutral current; selected total PF, kW, KVA, kVAR, FREQ, kVAh, kWh.

Detected alarm conditions include over/under current, over/under voltage, over/under KVA, over/under frequency, over/under selected PF/kVAR, voltage phase reversal, voltage imbalance, reverse power, over percent THD. Include a Form C KYZ pulse output relay on the meter.

][ (2) Power Meter: Display Watts, VARs, and selected KVA/PF. Detected alarm conditions include over/under KVA, over/under PF, over/under VARs, over/under reverse power.

][ (3) Volt Meter: Provide capability to be selectable between display of the three phases of phase to neutral voltages and display of the three phases of the phase to phase voltages. Detected alarm conditions include over/under voltage, over/under voltage imbalance, over percent THD.

][ (4) Ammeter: Display phase A, B, and C currents. Detected alarm conditions include over/under current, over percent THD.

][ (5) Digital Watthour Meter: Provide a single selectable display for watts, total kilowatt hours (kWh) and watt demand (Wd). Include a Form C KYZ pulse output relay on the meter.

] b. Design meters to accept[ input from standard 5A secondary instrument transformers][ and][ direct voltage monitoring range to [300][600] volts, phase to phase].

c. Provide programming via a front panel display and a communication interface accessible by a computer.

d. Provide password secured programming stored in non-volatile EEPROM memory.

e. Provide digital communications in a Modbus [RTU] protocol via a [RS232C][RS485] serial port[ and an independently addressable [RS232C][RS485] serial port].

f. Provide meter that calculates and stores average max/min demand values with time and date for all readings based on a user selectable sliding window averaging period.

g. Provide meter with programmable hi/low set limits with two Form C dry contact relays when exceeding alarm conditions.

[ h. Provide meter with a display of Total Harmonic Distortion (THD) measurement to a minimum of the thirty-first order.

][ i. Include historical trend logging capability with the ability to store up to 100,000 data points with intervals of 1 second to 180 minutes.

Provide a unit that can store and time stamp up to 1000 programmable triggered conditions.

SECTION 26 24 13 Page 21

][ j. Provide event waveform recording triggered by the rms of 2 cycles of voltage or current exceeding programmable set points. Store waveforms for all 6 channels of voltage and current for a minimum of 10 cycles prior to the event and 50 cycles past the event.

] ][ 2.2.6.2 Electronic Watthour Meter

NOTE: For t he Ai r For ce, use Sect i on 26 27 13. 10 30

ELECTRI C METERS.

For t he Navy, use Sect i on 26 27 14. 00 20 ELECTRI CI TY

METERING.

For t he Ar my, coor di nat e met er r equi r ement s i n accor dance wi t h Engi neer i ng and Const r uct i on Bul l et i n ECB 2015- 2, Advanced Met er i ng and Connectivity.

[ Provide as specified in Section [ 26 27 14.00 20 ELECTRICITY METERING][

26 27 13.10 30 ELECTRIC METERS].

][ ANSI C12.1 . Provide a switchboard style electronic programmable watthour meter, semi-flush mounted, as indicated. Meter can be either programmed at the factory or programmed in the field. Turn field programming device over to the Contracting Officer at completion of project. Coordinate meter to system requirements.

a. Design: Provide meter designed for use on a 3-phase, 4-wire, [208Y/120][480Y/277] volt system with 3 current transformers. Include necessary KYZ pulse initiation hardware for Energy Monitoring and Control System (EMCS).

b. Coordination: Provide meter coordinated with ratios of current transformers and transformer secondary voltage.

c. Class: 20. Accuracy: plus or minus 1.0 percent. Finish: Class II.

d. Kilowatt-hour Register: five digit electronic programmable type.

e. Demand Register:

(1) Provide solid state.

(2) Meter reading multiplier: Indicate multiplier on the meter face.

(3) Demand interval length: programmed for [15][30][60] minutes with rolling demand up to six subintervals per interval.

f. Meter fusing: Provide a fuse block mounted in the metering compartment containing one fuse per phase to protect the voltage input to the watthour meter. Size fuses as recommended by the meter manufacturer.

g. Provide meter with a communications port, RS485, with Modbus RTU serial or Ethernet, Modbus-TCP communications.

SECTION 26 24 13 Page 22

NOTE: Sel ect t he appr opr i at e cur r ent t r ansf or mer ( CT) r at i o, cont i nuous- t her mal - cur r ent r at i ng f act or ( RF) at 30 degr ees C and ANSI Met er i ng Accur acy Cl ass val ues based on t he CT Rat i o whi ch i s j ust bel ow t he r at i ng of t he mai n pr ot ect i ve devi ce.

Sel ect an ANSI Met er i ng Accur acy Cl ass i n accor dance wi t h t he f ol l owi ng t abl e:

CT Rat i o RF Accur acy Cl ass

200/5 4.0 0. 3 t hr u B- 0. 1

300/5 3.0 0. 3 t hr u B- 0. 2

400/5 4.0 0. 3 t hr u B- 0. 2

600/5 4.0 0. 3 t hr u B- 0. 5

800/5 2.0 0. 3 t hr u B- 0. 5

1200/5 1.5 0. 3 t hr u B- 0. 5

1500/5 1.5 0. 3 t hr u B- 0. 9

2000/5 1.5 0. 3 t hr u B- 1. 8

IEEE C57.13 . Provide single ratio transformers, 60 hertz, [_____] to 5-ampere ratio, [_____] rating factor, with a metering accuracy class of

0.3 through [_____].

[ Provide a fuse block mounted in the metering compartment containing one fuse per phase to protect the voltage input to voltage sensing meters.

Size fuses as recommended by the meter manufacturer.

]] ][ 2.2.6.3 Submetering

NOTE: For bases and act i v i t i es t hat have an act i ve submet er i ng pol i cy i n pl ace and wr i t t en aut hor i zat i on has been r ecei ved, edi t t hi s sect i on as necessar y t o speci f y t he desi r ed l evel of submet er i ng and l ocat i ons.

UFC 1- 200- 02 r ef er ences ASHRAE 90. 1- 2010. But ASHRAE 90. 1- 2010 does not addr ess submet er i ng cr i t er i a. The i nt ended r ef er ence f or t hi s sect i on i s ASHRAE 90. 1- 2013, whi ch does addr ess submet er i ng criteria.

I f submet er i ng i s sel ect ed as an opt i on, coor di nat e r ef er ences t o ASHRAE 90. 1 wi t h t he l ead per son edi t i ng t he Di v i s i on 1 Sect i ons. Typi cal l y, r ef er ences t o ASHRAE 90. 1 i n t hi s Sect i on wi l l be t o

SECTION 26 24 13 Page 23 t he 2013 edi t i on, wher eas r ef er ences t o ASHRAE 90. 1 i n ot her Sect i ons wi l l be t o t he 2010 edi t i on.

ASHRAE 90.1 - IP . Provide submetering for [_____].

] ][ 2.2.7 Transformer

NOTE: Coor di nat e wi t h Sect i on 26 20 00 I NTERI OR DI STRI BUTI ON SYSTEM, when t r ansf or mer sect i on i s pr ovi ded.

Provide transformer section in switchboard in accordance with UL 891 and as indicated. Provide the transformer and section that is suitable for the installation.[ Test transformers greater than 10 kVA in accordance with UL 891 .] Provide a transformer conforming to the requirements of Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM.

][ 2.2.8 Heaters

NOTE: Sel ect t he heat er opt i on i f t he swi t chboar d wi l l be i nst al l ed i n a non- envi r onment al l y cont r ol l ed ar ea.

Provide 120-volt heaters in each switchboard section. Provide heaters of sufficient capacity to control moisture condensation in the section, 250 watts minimum, and controlled by a thermostat[ and humidistat] located in the section. Provide industrial type thermostat, high limit, to maintain sections within the range of 15 to 32 degrees C 60 to 90 degrees F .[ Provide humidistat with a range of 30 to 60 percent relative humidity.] Obtain supply voltage for the heaters from a control power transformer within the switchboard. If heater voltage is different than switchboard voltage, provide transformer rated to carry 125 percent of heater full load rating. Provide transformer with a 220 degrees C insulation system with a temperature rise not exceeding 115 degrees C and conforming to NEMA ST 20 .[ Energize electric heaters in switchboard assemblies while the equipment is in storage or in place prior to being placed in service.

Provide method for easy connection of heater to external power source.

Provide temporary, reliable external power source if commercial power at rated voltage is not available on site.]

] 2.2.9 Terminal Boards

Provide with engraved plastic terminal strips and screw type terminals for external wiring between components and for internal wiring between removable assemblies. Provide short-circuiting type terminal boards associated with current transformer. Terminate conductors for current transformers with ring-tongue lugs. Provide terminal board identification that is identical in similar units. Provide color coded external wiring that is color coded consistently for similar terminal boards.

2.2.10 Wire Marking

Mark control and metering conductors at each end. Provide factory installed, white, plastic tubing, heat stamped with black block type

SECTION 26 24 13 Page 24 letters on factory-installed wiring. On field-installed wiring, provide white, preprinted, polyvinyl chloride (PVC) sleeves, heat stamped with black block type letters. Provide a single letter or number on each sleeve, elliptically shaped to securely grip the wire, and keyed in such a manner to ensure alignment with adjacent sleeves. Provide specific wire markings using the appropriate combination of individual sleeves.

Indicate on each wire marker the device or equipment, including specific terminal number to which the remote end of the wire is attached.

2.3 MANUFACTURER'S NAMEPLATE

Provide a nameplate on each item of equipment bearing the manufacturer's name,…