B.08.03_TechSpecs_0004.pdf

Lower Gr ani t e DC Syst em and LV Swi t chgear W912EF19R0002 Amend-0004

PROJECT TABLE OF CONTENTS

DI VI SI ON 00 - PROCUREMENT AND CONTRACTI NG REQUI REMENTS

00 01 15. 00 28 LI ST OF DRAWI NGS

DI VI SI ON 01 - GENERAL REQUI REMENTS

01 00 00. 00 28 GENERAL REQUI REMENTS

01 11 00. 00 28 SUMMARY OF WORK

01 11 01. 00 28 SUPPLEMENTARY REQUI REMENTS

01 12 16. 00 28 WORK SEQUENCE

01 14 00. 10 28 PROJECT SI TE RESTRI CTI ONS

01 14 00. 90 28 I NTEGRATI NG ANTI TERRORI SM ( AT) AND OPERATI ONS SECURI TY

(OPSEC)

01 22 00. 00 28 MEASUREMENT AND PAYMENT

01 32 01. 00 28 PROJECT SCHEDULE

01 33 00 SUBMI TTAL PROCEDURES

01 35 29. 10 28 GOVERNMENTAL SAFETY REQUI REMENTS

01 42 00 SOURCES FOR REFERENCE PUBLI CATI ONS

01 45 01. 00 28 RESI DENT MANAGEMENT SYSTEM CONTRACTOR MODE ( RMS CM)

01 45 04. 00 28 CONTRACTOR QUALI TY CONTROL

01 51 00. 00 28 TEMPORARY UTI LI TI ES

01 55 10. 00 28 CONTRACTOR WORK, ACCESS AND STORAGE AREAS

01 57 20. 00 28 ENVI RONMENTAL PROTECTI ON

01 78 00. 00 28 CLOSEOUT SUBMI TTALS

01 78 23. 00 28 OPERATI ON AND MAI NTENANCE DATA

DI VI SI ON 03 - CONCRETE

03 60 00. 01 26 CONCRETE DEMOLI TI ON, REPAI R OF CONCRETE SURFACES, AND

EQUI PMENT FOUNDATI ONS

DI VI SI ON 08 - OPENI NGS

08 11 13. 10 28 STEEL DOORS AND FRAMES

08 71 00. 10 28 DOOR HARDWARE

DI VI SI ON 09 - FI NI SHES

09 29 00. 00 28 GYPSUM FI RE WALL ASSEMBLY

09 67 23. 13 28 EPOXY FLOORI NG

09 90 00. 00 28 PAI NTS AND COATI NGS

DI VI SI ON 13 - SPECI AL CONSTRUCTI ON

13 48 00. 00 26 SEI SMI C RESTRAI NT FOR MECHANI CAL AND ELECTRI CAL EQUI PMENT

DI VI SI ON 22 - PLUMBI NG

22 00 00. 00 26 PLUMBI NG, GENERAL PURPOSE

22 05 30. 11 28 METAL SUPPORTS FOR MECHANI CAL SYSTEMS

DI VI SI ON 23 - HEATI NG, VENTI LATI NG, AND AI R CONDI TI ONI NG ( HVAC)

23 00 00. 00 26 AI R SUPPLY, DI STRI BUTI ON, VENTI LATI ON, AND EXHAUST SYSTEMS

DI VI SI ON 26 - ELECTRI CAL

PROJECT TABLE OF CONTENTS Page 1

26 05 00. 00 26 BASI C ELECTRI CAL MATERI ALS AND METHODS

26 05 13. 00 26 MEDI UM- VOLTAGE CABLE

26 05 19. 00 26 I NSULATED WI RE AND CABLE

26 05 26. 00 26 GROUNDING

26 05 36. 00 26 CABLE TRAYS FOR ELECTRI CAL SYSTEMS

26 08 01. 00 26 SYSTEMS TESTI NG AND COMMI SSI ONI NG

26 23 10. 10 26 480 VOLT SWI TCHGEAR AND TRANSFORMERS

26 24 19. 00 26 MOTOR CONTROL CENTERS

26 28 00. 00 26 SWI TCHBOARDS AND PANELBOARDS

26 32 34. 00 26 BATTERIES

26 32 36. 00 26 BATTERY CHARGERS AND I NVERTERS

DI VI SI ON 27 - COMMUNI CATI ONS

27 21 10. 00 26 FI BER OPTI C DATA TRANSMI SSI ON SYSTEM

DI VI SI ON 40 - PROCESS I NTERCONNECTI ONS

40 95 00. 00 26 PROCESS CONTROL

- - End of Pr oj ect Tabl e of Cont ent s - -

PROJECT TABLE OF CONTENTS Page 2 g4ecdjgh Pencil

Lower Granite DC System and LV Switchgear W912EF19R0002

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 05 36.00 26

CABLE TRAYS FOR ELECTRICAL SYSTEMS

PART 1 GENERAL

1.1 DESCRIPTION OF WORK

1.2 REFERENCES

1.3 SUBMITTALS

1.4 DRAWINGS

1.5 QUALIFICATIONS

1.6 DELIVERY, STORAGE AND HANDLING

1.6.1 Delivery

1.6.2 Storage

1.6.3 Handling

PART 2 PRODUCTS

2.1 SYSTEM DESCRIPTION

2.1.1 Seismic Requirements

2.1.2 Performance Requirement

2.1.2.1 Cable Tray Loading

2.1.2.2 Grounding and Bonding

2.2 CABLE TRAY SYSTEM

2.2.1 Material

2.2.2 Finish

2.2.3 Cable Trays

2.2.4 Splice Plates and Expansion Joints

2.2.5 Cable Cleats

2.2.6 Hangers and Supports

2.2.7 Hardware and Accessories

2.2.7.1 Cable Tray Grounding Conductor Clamp

2.2.7.2 Cable Tray Conduit Clamp

2.2.7.3 Cable Tray Dropouts

PART 3 EXECUTION

3.1 INSPECTION

3.2 PREPARATION

3.2.1 Site Preparation

3.2.2 Existing Cables

3.3 INSTALLATION

3.3.1 General

3.3.2 Manufacturer's instructions

3.3.3 Cable Tray System Layout

3.3.4 Cable Tray Fill

3.3.5 Interference with Existing Equipment

3.3.6 Hangers and Supports

3.3.7 Cable Cleats

3.3.8 Existing Cables

SECTION 26 05 36.00 26 - Page 1

3. 3. 9 Tol er ances

3. 3. 9. 1 Hor i zont al Tr ays

3. 3. 9. 2 Ver t i cal Tr ays

3. 3. 10 Fi el d Modi f i cat i ons

3. 3. 11 Coat i ng Repai r s

3. 3. 11. 1 Hot - Di p Gal vani zed Cabl e Tr ay

3. 3. 11. 2 Hot - Di p Mi l l Gal vani zed Cabl e Tr ays

3. 4 CONDUI T TERMI NATI ON

3. 5 GROUNDI NG

3. 6 I NSPECTI ON

3. 7 CABLE I NSTALLATI ON

- - End of Sect i on Tabl e of Cont ent s - -

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SECTI ON 26 05 36. 00 26

CABLE TRAYS FOR ELECTRI CAL SYSTEMS

PART 1 GENERAL

1. 1 DESCRI PTI ON OF WORK

Thi s speci f i cat i on i ncl udes t he desi gn, f abr i cat i on, assembl y, i nst al l at i on and gr oundi ng of cabl e t r ay syst ems f or Lower Gr ani t e Power house.

1. 2 REFERENCES

The publ i cat i ons l i s t ed bel ow f or m a par t of t hi s speci f i cat i on t o t he ext ent r ef er enced. The publ i cat i ons ar e r ef er r ed t o i n t he t ext by t he basi c desi gnat i on onl y.

AMERI CAN SOCI ETY FOR TESTI NG AND MATERI ALS ( ASTM)

ASTM A123/ A123M ( 2015) St andar d Speci f i cat i on f or Zi nc ( Hot - Di p Gal vani zed) Coat i ngs on I r on and St eel Pr oduct s

ASTM A653/ A653M ( 2015; E 2016) St andar d Speci f i cat i on f or St eel Sheet , Zi nc- Coat ed ( Gal vani zed) or Zi nc- I r on Al l oy- Coat ed ( Gal vanneal ed) by t he Hot - Di p Pr ocess

ASTM A780/ A780M ( 2009; R 2015) St andar d Pr act i ce f or Repai r of Damaged and Uncoat ed Ar eas of Hot - Di p Gal vani zed Coat i ngs

ASTM A1008/ A1008M ( 2015) St andar d Speci f i cat i on f or St eel , Sheet , Col d- Rol l ed, Car bon, St r uct ur al , Hi gh- St r engt h Low- Al l oy and Hi gh- St r engt h Low- Al l oy wi t h I mpr oved For mabi l i t y , Sol ut i on Har dened, and Bake Har dened

ASTM A1011/ A1011M ( 2015) St andar d Speci f i cat i on f or St eel , Sheet , and St r i p, Hot - Rol l ed, Car bon, St r uct ur al , Hi gh- St r engt h Low- Al l oy and Hi gh- St r engt h Low- Al l oy wi t h I mpr oved For mabi l i t y and Ul t r a- Hi gh St r engt h

I NSTI TUTE OF ELECTRI CAL AND ELECTRONI CS ENGI NEERS ( I EEE)

I EEE 422 ( 2012) Gui de f or t he Desi gn of Cabl e Raceway Syst ems f or El ect r i c Gener at i ng Facilities

NATI ONAL ELECTRI CAL MANUFACTURERS ASSOCI ATI ON ( NEMA)

NEMA VE 1 ( 2009) St andar d f or Met al Cabl e Tr ay Systems

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NEMA VE 2 ( 2013; ERTA 2016) Cabl e Tr ay I nst al l at i on Guidelines

NATI ONAL FI RE PROTECTI ON ASSOCI ATI ON ( NFPA)

NFPA 70 ( 2017) Nat i onal El ect r i cal Code

1. 3 SUBMITTALS

Gover nment appr oval i s r equi r ed f or submi t t al s wi t h a " G" desi gnat i on;

submi t t al s havi ng an " I " desi gnat i on ar e f or i nf or mat i on onl y. When used, a desi gnat i on f ol l owi ng t he " G" or " I " desi gnat i on i dent i f i es t he of f i ce t hat wi l l r evi ew t he submi t t al f or t he Gover nment . The f ol l owi ng shal l be submi t t ed i n accor dance wi t h Sect i on 01 33 00 SUBMI TTAL PROCEDURES:

SD- 01 Pr econst r uct i on Submi t t al s

Submi t wi t hi n 90 days af t er Not i ce To Pr oceed:

Cabl e Tr ay I nst al l at i on Pl an; G HDC

SD- 02 Shop Dr awi ngs

Submi t wi t hi n 90 days af t er Not i ce To Pr oceed:

Fabr i cat i on And Assembl y Dr awi ngs; G, HDC

I nst al l at i on Dr awi ngs; G, HDC

SD- 03 Pr oduct Dat a

Submi t wi t hi n 90 days af t er Not i ce To Pr oceed:

Cabl e Tr ay Syst em; G, HDC

Hanger s and Suppor t s; G, HDC

Cabl e Cl eat s; G HDC

Har dwar e and Accessor i es; G HDC

SD- 05 Desi gn Dat a

Submi t wi t hi n 90 days af t er Not i ce To Pr oceed:

Cabl e Tr ay Fi l l Cal cul at i ons; G HDC

Cl eat Manuf act ur er ' s Spaci ng Cal cul at i ons; G HDC

SD- 08 Manuf act ur er ' s I nst r uct i ons

Submi t wi t hi n 90 days af t er Not i ce To Pr oceed:

Manuf act ur er ' s I nst r uct i ons; I HDC

1. 4 DRAWINGS

I nst al l at i on dr awi ngs and Fabr i cat i on And Assembl y Dr awi ngs shal l be submi t t ed f or appr oval . Dr awi ngs shal l be coor di nat ed wi t h al l ot her wor k i n t he i mmedi at e ar ea t hat coul d come i n conf l i c t wi t h t he i nst al l at i on.

SECTI ON 26 05 36. 00 26 - Page 4

Dr awi ngs shal l i ncl ude l ayout of cabl e t r ay wor k, i ncl udi ng det ai l s of bot h hor i zont al and ver t i cal suppor t s. Bot h hor i zont al and ver t i cal suppor t s shal l be as speci f i ed i n par agr aph SUPPORTS.

1. 5 QUALIFICATIONS

Manuf act ur er shal l have a mi ni mum of 5 year s document ed exper i ence speci al i z i ng i n t he manuf act ur i ng of pr oduct s speci f i ed i n t hi s sect i on.

1. 6 DELI VERY, STORAGE AND HANDLI NG

1. 6. 1 Delivery

Cabl e t r ays shal l be bundl ed f or shi pment t o pr event movement or damage dur i ng shi pment . Accessor i es and smal l component s shal l be boxed and pl aced on a pal l et . For k ext ensi ons shal l be used t o of f l oad ski dded cabl e t r ays bundl es f r om t r ai l er s. Cabl e t r ays shal l not be of f l oaded by at t achi ng a chai n or r ope t o t he bot t om r ung and dr aggi ng out of t he trailer.

1. 6. 2 Storage

Cabl e t r ays st or ed out s i de shal l be l oosel y st acked, el evat ed of t he gr ound and cover ed t o pr event st ai ni ng or damagi ng t he cabl e t r ays. Cabl e t r ays shal l be st or ed away f r om hi gh t r af f i c ar eas.

1. 6. 3 Handling

Cabl e t r ays shal l be handl ed t o pr event damage. I f l i f t i ng cabl e t r ays wi t h a cr ane, ensur e t hat t he s l i ng i s pr oper l y l ocat ed t o pr event damage.

PART 2 PRODUCTS

2. 1 SYSTEM DESCRI PTI ON

2. 1. 1 Sei smi c Requi r ement s

The st r uct ur al desi gn cal cul at i ons f or sei smi c r est r ai nt s and det ai l dr awi ngs f or cabl e t r ay syst ems shal l be devel oped by t he Cont r act or i n accor dance wi t h t he r equi r ement s of Sect i on 13 48 00. 00 26, SEI SMI C

RESTRAI NT FOR MECHANI CAL AND ELECTRI CAL EQUI PMENT.

2. 1. 2 Per f or mance Requi r ement

2. 1. 2. 1 Cabl e Tr ay Loadi ng

Cabl e t r ay l oadi ng l oadi ng cal cul at i ons shal l i ncl ude a t r ay l oadi ng f act or ( saf et y f act or ) of 2. 0.

2. 1. 2. 2 Gr oundi ng and Bondi ng

Met al cabl e t r ays must be gr ounded and el ect r i cal l y cont i nuous syst ems per NFPA 70. Cabl e t r ays shal l not be use used as a Equi pment Gr ound Conduct or

(EGC.)

2. 2 CABLE TRAY SYSTEM

Al l cabl e t r ay segment s and component s used i n t he cabl e t r ay syst em shal l conf or m t o t he appl i cabl e r equi r ement s of NEMA VE 1. Al l component s shal l

SECTI ON 26 05 36. 00 26 - Page 5 be f ur ni shed by t he same manuf act ur er .

2. 2. 1 Material

Al l s i de r ai l s , cover s, spl i ce pl at es, and r ungs shal l be made f r om st r uct ur al qual i t y st eel meet i ng t he mi ni mum mechani cal pr oper t i es of ASTM A1011/ A1011M Gr ade 33 f or 14 gauge and heavi er , or ASTM A1008/ A1008M, Gr ade 33 Type 2 f or 16 gauge and l i ght er .

2. 2. 2 Finish

St eel cabl e t r ays f or use i n out door appl i cat i ons shal l be Hot - Di p Gal vani z i ng af t er f abr i cat i on i n accor dance wi t h ASTM A123/ A123M and cabl e t r ays f or use i n i ndoor appl i cat i ons shal l be Hot - Di p Mi l l Gal vani z i ng i n accor dance wi t h ASTM A653/ A653M.

2. 2. 3 Cabl e Tr ays

Cabl e t r ays shal l be l adder t ype wi t h a 9 i nch maxi mum r ung spaci ng and a maxi mum span of 12 f eet t hat meet t he f ol l owi ng r equi r ement s:

a. Tr ay Wi dt h shal l be 36i nches wi de.

b. Mi ni mum Fi l l Dept h shal l be 4 i nches.

c. Out si de dept h shal l not exceed t he i nsi de dept hs by mor e t han 1- 1/ 4 inch.

d. Rat ed f or a span/ l oad of 100 pounds per f oot .

e. I n addi t i on t o, and concur r ent wi t h, t he t r ay l oadi ng capaci t y and t he dead wei ght l oad of t he t r ay syst em, t he cabl e t r ay shal l nei t her f ai l nor be per manent l y di st or t ed by a concent r at ed l oad of 200 pounds at mi d- span whet her t he l oad i s at t he cent er l i ne of t he t r ay or on ei t her s i de r ai l as r equi r ed by I EEE 422.

f . Wi r e Mesh Cabl e Tr ays shal l be of t he wi r e mesh basket t r ay t ype.

Wi r e mesh basket t r ays shal l be a mi ni mum wi dt h of 18 i nches and dept h of 4 i nches.

2. 2. 4 Spl i ce Pl at es and Expansi on Joi nt s

Spl i ce pl at es and expansi on j oi nt s shal l be pr e- dr i l l ed and compat i bl e wi t h t he cabl e t r ay syst em. Spl i ce pl at es and expansi on j oi nt s shal l have t he same f i ni sh as t he cabl e t r ays. Expansi on pl at es shal l al l ow f or a mi ni mum of 1 i nch of expansi on or cont r act i on of t he cabl e t r ay.

2. 2. 5 Cabl e Cl eat s

Cl eat spaci ng shal l be det er mi ned by t he c l eat manuf act ur er . Cabl e c l eat s shal l be s i zed f or t he cabl e s i ze and conf i gur at i on. The mount i ng br acket shal l be compat i bl e wi t h t he cabl e t r ay.

2. 2. 6 Hanger s and Suppor t s

a. The st r uct ur al desi gn cal cul at i ons f or sei smi c r est r ai nt s and det ai l dr awi ngs f or cabl e t r ay syst ems shal l be devel oped by t he Cont r act or i n accor dance wi t h t he r equi r ement s of Sect i on 13 48 00. 00 26, SEI SMI C RESTRAI NT FOR MECHANI CAL AND ELECTRI CAL EQUI PMENT. The cabl e t r ay

SECTI ON 26 05 36. 00 26 - Page 6 g4ecdjgh Pencil suppor t conf i gur at i on shal l be desi gned by t he Cont r act or and shal l be r ef l ect ed i n t he f abr i cat i on dr awi ngs and t he i nst al l at i on dr awi ngs.

b. Suppor t s shal l be f abr i cat ed f r om mi ni mum 12 gauge st eel channel , 1- 5/ 8 by 1- 5/ 8 i nches, wi t h a cont i nuous 7/ 8- i nch wi de s l ot , hot - di p gal vani zed af t er f abr i cat i on. Suppor t s shal l pr ovi de at l east 1- 1/ 8 i nch bear i ng l engt h f or each r ai l and shal l have pr ovi s i on f or t r ay hol d- down cl amps and f ast ener s. Nei t her cabl e t r ay nor suppor t s shal l be at t ached t o t he new or exi st i ng equi pment .

2. 2. 7 Har dwar e and Accessor i es

Al l har dwar e and accessor i es, such as but not l i mi t ed t o c l amps, condui t adapt er s, l adder dr op- out s and cover s used shal l be compat i bl e wi t h t he cabl e t r ay syst em and f i ni sh.

2. 2. 7. 1 Cabl e Tr ay Gr oundi ng Conduct or Cl amp

Cabl e t r ay gr oundi ng conduct or c l amps be of mal l eabl e i r on and shal l be speci f i cal l y desi gned f or use wi t h cabl e t r ays. Cl amps shal l be s i zed f or t he gr oundi ng conduct or used. Cl amps shal l have separ at e f ast ener s/ set scr ews f or secur i ng t he c l amp t o t he t r ay and f or secur i ng t he gr oundi ng conduct or t o t he c l amp.

2. 2. 7. 2 Cabl e Tr ay Condui t Cl amp

Cabl e t r ay condui t c l amps shal l have a cast i r on body wi t h a st eel hook.

They shal l be s i zed t o mat ch t he condui t s i ze. Cl amps shal l have i ndependent means f or secur i ng t he c l amp t o t he cabl e t r ay and f or secur i ng t he condui t t o t he c l amp. Cl amps shal l be desi gned t o bond t he condui t t o t he cabl e t r ay. Met al condui t st r aps shal l not be used f or t hi s pur pose.

2. 2. 7. 3 Cabl e Tr ay Dr opout s

Cabl e t r ay dr opout s shal l span t he ent i r e wi dt h of t he cabl e t r ay and pr ovi de a smoot h sur f ace f or dr oppi ng cabl es out of t he cabl e t r ay bet ween r ungs. The dr opout shal l have a mi ni mum r adi us of 4- i nches.

PART 3 EXECUTI ON

3. 1 INSPECTION

Upon r ecei pt , i nspect t he cabl e t r ays f or shi ppi ng damage. Damaged cabl e t r ays shal l not be r epai r ed. Ret ur n al l damaged cabl e t r ays t o t he manufacturer.

3. 2 PREPARATION

3. 2. 1 Si t e Pr epar at i on

Al l equi pment sur r oundi ng t he cabl e t r ay i nst al l at i on shal l be pr ot ect ed f r om damage. Exi st i ng equi pment , pi pes, cabl e t r ays, et c. , shal l not be used t o suppor t t he cabl e t r ays dur i ng i nst al l at i on.

3. 2. 2 Exi st i ng Cabl es

Ci r cui t s t hat must r emai n ener gi zed dur i ng t he cabl e t r ay i nst al l at i on shal l be pr ovi ded wi t h an al t er nat e sour ce of power dur i ng t he out age or t he cabl es must r emai n i nt act and ener gi zed dur i ng t he cabl e t r ay

SECTI ON 26 05 36. 00 26 - Page 7 replacement.

3. 3 INSTALLATION

3. 3. 1 General

A Cabl e t r ay i nst al l at i on pl an shal l be submi t t ed pr i or t o commenci ng any wor k. The pl an shoul d det ai l t he sequenci ng, schedul i ng, out ages, needed t o i nst al l t he cabl e t r ays. The pl an shoul d al so addr ess how t he t r ays wi l l i nt er f ace wi t h t he exi st i ng equi pment and t he handl i ng of cr i t i cal l oads t hat must r emai n ener gi zed dur i ng out ages. The cabl e t r ays and suppor t s shal l be i nst al l ed per t he appr oved i nst al l at i on dr awi ngs.

3. 3. 2 Manuf act ur er ' s i nst r uct i ons

Cabl e t r ay Manuf act ur er ' s i nst r uct i ons shal l be submi t t ed f or r evi ew. The i nst r uct i ons shal l i ncl ude any speci al t ool s, i nst al l at i on, i nspect i on and cabl e i nst al l at i on r equi r ement s needed t o i nst al l t he cabl e t r ay syst em.

3. 3. 3 Cabl e Tr ay Syst em Layout

The opt i mal ver t i cal spaci ng f or cabl e t r ays i s a mi ni mum of 6 i nches, measur ed f r om t he bot t om of t he upper t r ay t o t he t op of t he l ower t r ay. A mi ni mum cl ear ance of 6 i nches shoul d be mai nt ai ned bet ween t he t op of a t r ay and beams, pi pi ng, et c. , t o f aci l i t at e i nst al l at i on of cabl es i n t he t r ay. Cabl es i nst al l ed i n st acked cabl e t r ays shal l be ar r anged by descendi ng vol t age l evel s, wi t h t he hi gher vol t age at t he t op.

3. 3. 4 Cabl e Tr ay Fi l l

Cabl e t r ay f i l l shal l be i n accor dance wi t h Ar t i c l e 392 of NFPA 70. The cabl e t r ay f i l l and cabl e or i ent at i on shal l mi ni mi ze t he need t o der at e t he cabl e ampaci t y of t he c i r cui t s. Pr ovi de cabl e t r ay f i l l cal cul at i ons whi ch i ncl ude t he f ol l owi ng:

a. Cabl e t r ay f i l l cal cul at i on

b. Cabl e ampaci t y adj ust ment s

c. Revi ew of t he i mpact of t he ampaci t y adj ust ment s on t he syst em desi gn. Thi s r evi ew shal l i ncl ude a r evi ew of t he i mpact t he l ar ger cabl es wi l l have on cabl e t er mi nat i on of t he ef f ect ed equi pment and t he conduit.

3. 3. 5 I nt er f er ence wi t h Exi st i ng Equi pment

Cabl e t r ays shal l not be i nst al l ed wi t hi n 12 i nches of exi st i ng equi pment .

Thi s al l ows f or access f or mai nt enance or modi f i cat i on wor k. Thi s mi ni mum di st ance al so al l ows f or some ai r f l ow ar ound t he t r ay. Per sonnel shal l not st and on exi st i ng equi pment , pi pes, condui t s or cabl e t r ays dur i ng t he i nst al l at i on of t he new cabl e t r ays.

3. 3. 6 Hanger s and Suppor t s

Hanger s and suppor t s and t hei r associ at ed anchor s shal l be i nst al l ed per t he manuf act ur er ' s i nst r uct i ons and as i ndi cat ed on t he appr oved i nst al l at i on dr awi ngs and st r uct ur al cal cul at i ons per Sect i on 13 48 00. 00 26, SEI SMI C RESTRAI NT FOR MECHANI CAL AND ELECTRI CAL EQUI PMENT.

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3. 3. 7 Cabl e Cl eat s

Cabl e c l eat s shal l be i nst al l ed per t he manuf act ur er ' s i nst r uct i ons and t he r equi r ed spaci ng t o ensur e t he cabl es and cabl e t r ays ar e adequat el y pr ot ect ed dur i ng a shor t c i r cui t . Cl eat spaci ng f or shor t c i r cui t r est r ai nt i n hor i zont al r uns shal l be suppor t ed by t he c l eat manuf act ur er ' s spaci ng cal cul at i ons. Appr oval of t hese cal cul at i ons shal l not r el i eve t he Cont r act or f r om r emedyi ng t he c l eat spaci ng and r epai r i ng t he exi st i ng cabl e t r ay at no addi t i onal cost t o t he Gover nment i f t he c l eat ed cabl es damage t he exi st i ng t r ay due t o t her mal expansi on under t he 24- hour l oad t est . The Cont r act or i s encour aged t o secur e coor di nat i on bet ween t he cabl e manuf act ur er and t he c l eat manuf act ur er f or c l eat spaci ng sui t abl e f or t he speci f i ed f aul t cur r ent whi l e st i l l al l owi ng enough l engt h of t he cabl es bet ween cl eat s t o f l ex by t her mal expansi on under f ul l l oad. Cabl e c l eat s shal l not be over t i ght ened t o ensur e t he cabl es ar e not damaged. The cabl e shal l not bul ge at ei t her s i de of t he cabl e c l eat st r ap.

3. 3. 8 Exi st i ng Cabl es

When i nst al l i ng new cabl e t r ays ar ound exi st i ng cabl es, car e shoul d be t aken dur i ng i nst al l at i on of t he new t r ays t o pr event damagi ng t he exi st i ng cables.

3. 3. 9 Tolerances

3. 3. 9. 1 Hor i zont al Tr ays

I nst al l at i on shal l be l evel , st r ai ght , and t r ue t o l i ne or gr ade wi t hi n pl us 1/ 8- i nch i n 10 f eet and wi t hi n an accumul at i ve maxi mum of 1/ 2- i nch.

3. 3. 9. 2 Ver t i cal Tr ays

Ver t i cal st r uct ur es shal l be pl umb wi t hi n a t ol er ance of 1/ 8- i nch per 10 f eet of l engt h.

3. 3. 10 Fi el d Modi f i cat i ons

When a r equi r ed cabl e t r ay l engt h i s l ess t han st andar d l engt hs t he cabl e t r ay f i el d modi f i cat i ons shal l be made by qual i f i ed per sonnel . Af t er cut t i ng, al l edges shal l be smoot h and al l bur r s shal l be r emoved. Hol es f or spl i ce pl at es shal l be l ocat ed i n t he f i el d modi f i ed cabl e t r ay usi ng an exi st i ng spl i ce pl at e as a t empl at e. Af t er dr i l l i ng t he hol es, r emove al l bur r s.

3. 3. 11 Coat i ng Repai r s

3. 3. 11. 1 Hot - Di p Gal vani zed Cabl e Tr ay

Cabl e t r ays t hat ar e Hot - Di p Gal vani z i ng af t er f abr i cat i on need t o be t ouched up af t er cut t i ng, dr i l l i ng or debur r i ng, or i f t he coat i ng becomes damaged. Touch- up of t he gal vani zed f i ni sh must be done accor di ng t o

ASTM A780/ A780M

3. 3. 11. 2 Hot - Di p Mi l l Gal vani zed Cabl e Tr ays

Cabl e t r ays made f r om mi l l - gal vani zed st eel do not need t o be t ouched up because t hey ar e not desi gned t o be used i n heavi l y cor r osi ve at mospher es and have bar e met al edges i nher ent i n t hei r desi gn.

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3. 4 CONDUI T TERMI NATI ON

Condui t s t er mi nat i ng at new and exi st i ng cabl e t r ays shal l be secur ed t o t he cabl e t r ays wi t h cabl e t r ay condui t c l amps speci f i cal l y desi gned f or t hi s pur pose.

3. 5 GROUNDING

Cabl e t r ays shal l be gr ounded and el ect r i cal l y cont i nuous. A cont i nuous bar e gr ound conduct or shal l be r out ed al ong t he ent i r e l engt h of each new cabl e t r ay r un and secur ed wi t h cabl e t r ay gr oundi ng conduct or c l amps.

Bondi ng j umper shoul d be used t o ensur e el ect r i cal cont i nui t y bet ween cabl e t r ays connect ed wi t h expansi on spl i ce pl at es, adj ust abl e spl i ce pl at es and di scont i nuous cabl e t r ays. The cabl e t r ay shal l onl y be connect ed t o t he st at i on gr ound at one end. Cabl e t r ays shal l not be used as t he Equi pment Gr ound Conduct or . The i ndi v i dual c i r cui t s wi l l be r equi r ed t o have t hei r own Equi pment Gr ound Conduct or .

3. 6 INSPECTION

Pr i or t o i nst al l at i on of t he cabl e, t he cabl e t r ay shal l be i nspect ed t o ensur e i t has been i nst al l ed per t he manuf act ur er ' s i nst r uct i on, t he appr oved assembl y and i nst al l at i on dr awi ngs, t he cont r act dr awi ngs and i n accor dance wi t h NEMA VE 2.

3. 7 CABLE I NSTALLATI ON

The i nst al l at i on of t he cabl es i nt o t he cabl e t r ays shoul d be i n accor dance wi t h t he cabl e manuf act ur er ' s and cabl e t r ay manuf act ur er ' s i nst r uct i ons and i n accor dance wi t h NEMA VE 2. Bef or e i nst al l i ng t he cabl e, i nspect t he cabl e pat hs t o ensur e t he t r ay i s f r ee of debr i s t hat may i nt er f er e wi t h t he cabl e i nst al l at i on. Ladder dr op out s shal l be i nst al l ed wher e cabl es ent er t he t r ay f r om equi pment l ocat ed bel ow t he cabl e t r ay. Not e t hat t he cabl e t r ays, suppor t s and hanger s shal l not be used as a wal kway, f or per sonal suppor t or f al l pr ot ect i on.

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2.2.3 Cable Trays