Lower Churchill Project - Technical Query

- QueryNo. Tj- Rev. No. 1 0fl tiC TProject Scope Component 3

Title Underground cable trenching standardSection 1 Submission Details

John Walsh -Transmission Lead a.(- - S3

Originator's Name & Title Signature DateRequest Organization NE-LCP Response Organization J NIH - PETS (Civil)Description of Question or Issue:No/car is requesting a copy of NLH's standard for underground power cable trenching.

Background and/ or Proposed Solution:

Reference Documents & Attachments:

Originator Management Assessment Approve EE1 Revise & Resubmit 0 Reject 0

I I 2 /-/ -2oName & Title Signai- Date

Section 2 Response Details-'- bctcoonI I F€- 2:7//3

Re.ponders Name & Title Signatbre DateResponse:

(cdd5Required Actions:

Manager's Name & Title Signature DateSection 3 CloseoutDetails/verification of actions implemented (include communication e.g. e-mails):

(ci)Reference Documents & Attachments (e.g. change management notices, drawings):

(t kd IChange Coordinator Authorization: ^^/ -th24 Date: '/ -

LCP-PT-MD-0000-IM-PR-0001-O1 Rev. 81

FINISHED GRADE HOLES TO BE CUT WITH HOLE SAWSUB-GRADE

OTHER SUITABLE FILLER GROUT OR

CABLE .. .•TRENCH

:.- USE 5 BENDS

1000

CONDUIT ENTRANCE INTO CABLE TRENCH

FINISH GRADE 100mm GRAVEL

ELECTRIC

WARNING TAPE

COMPACTED EARTH

SAND

- P.V.C. CONDUIT

50 I 50- _-

(MIN) (MIN)

SECTION SHOWINGBURIED P.V.C. CONDUIT

SCALE : 1:10

REF:BILL OF MATERIALS #TS08-0D2-DD1

D. CollettTERMINALS APPD.0. Reeves

"° I ENGINEERING STANDARDSISSUED 1997-07-15

DRAWN C. HarriumCONDUIT ARRANGEMENT CHECKED G. OKeefe

BURIED CONDUIT DETAILSDWG. No. 1S08-002-002--R1

PLOT 1:1

JL. TERMINALSENGINEERING STANDARD

CONDUIT ARRANGEMENT & DETAILS

No: TSO8-001-R0

Page: lof 2

Issued: 97-04-15

D. CollettApp'd.

D. Reeves

Scope

This Standard covers the installation of conduit for Terminal Stations. Drawingsshow general arrangement only and are not meant to be specific to any particularapplication. Minor changes in conduit routing may be required to comply withfield conditions.

2 Standard

2.1 All conduit and fittings shall be rigid PVC type unless otherwise specified. Useonly cleaner and solvent cement as specified by manufacturer.

2.2 Flexible non-metaffic liquidtight conduit shall be used for the final connection toequipment where shown on Drawings.

2.3 All conduits shall be supported to station structures as required by CanadianElectrical Code, Part I.

2.4 All conduits shall be bottom entry to junction or marshalling boxes.

2.5 Pvc '0" ring expansion joints shall be installed on all risers from undergroundconduit runs to junction or marshalling boxes and where otherwise shown onDrawings.

2.6 Structural members shall be fabricated to support enclosures and conduit whererequired.

2.7 End bells shall be installed on all underground conduits entering cable trenches.

2.8 Slots shall be cut in metal trench covers where necessary to allow for conduitentry.

2.9 All holes made in the sides of cable trenches for conduit entry shall be drilled andgrouted or sealed with caulking to prevent the entry of fill or stone.

2.10 All construction materials and debris shall be removed from cable trenches andconduit before installing wires and cables.

2.11 Buried conduit shall be buried a depth of 600 mm and will have 150 mm of sandabove and below for mechanical protection.

TSO8-001 -RONo:TERMINALS Page: 2of2I,II

ENGINEERING STANDARDIssued: 97-04-15

3 Justification

3.1 Rigid PVC conduit is specified for the following reasons:

- it has both high tensile and high impact strength

- easy to install requiring no special tools

- suitable for encasement in concrete or direct burial

- resistant to corrosion and maintenance free

- non-conductive thus eliminating second point of contact under faultconditions and phase to ground fault.

3.2 PVC Ott Ring Expansion Joints are specified on risers from underground conduitruns to panels to allow for vertical movement caused by freezing and thawing ofground. Expansion joints also maintain alignment of the conduit.

3.3 Flexible non-metallic conduit is specified as the final connection to equipmentdue to the ease of installation. Rigid conduit is often difficult to install due tophysical obstructions. Flexible non-metallic conduit and connectors as specifiedwill maintain a tough liquidtight seal and wifi simplify replacement of equipment.

4 Standards of Acceptances

4.1 The standard of acceptance for rigid PVC conduit and associated fittings shall beSceptre Rigid PVC Conduit Type II.

4.2 The standard of acceptance for flexible non-metallic conduit and associatedfittings shall be Hubbell, polytuff black non-metallic conduit.

5 Drawings

Drawing # TSO8-002-DOlBill of Materials, Conduit & Fittings

Drawing # TSO8-002-D02 to TSO8-002-D07Conduit Arrangements

ITEM DESCRIPTION

1 25mm P.V.C. RIGID CONDUIT

2 25mm LIQUID TIGHT FLEXIBLE CONDUIT (NON METALLIC)3 25mm P.V.C. 0-RING EXPANSION COUPLER4 25mm P.v.c. CONDUIT FITTING TYPE LB

5 25mm P.v.c. 90

6 25mm p.v.c. COATED STEEL PIPE STRAPS (1 HOLE)

7 25mm FEMALE ADAPTER FOR ITEM 18 25mm TERMINAL ADAPTER FOR ITEM 1 C/WLOCKNUT AND BUSHING9 25mm CONNECTOR FOR ITEM 2

10

11 50mm P.V.C. RIGID CONDUIT

12 50mm LIQUID TIGHT FLEXIBLE CONDUIT (NON METALLIC)13 50mm P.V.C. 0-RING EXPANSION COUPLER

14 50mm P.V.C. CONDUIT FITTING TYPE LB

15 50mm P.V.C. 90

16 50mm P.V.C. COATED STEEL PIPE STRAPS (1 HOLE)17 50mm FEMALE ADAPTER FOR ITEM 1118 50mm TERMINAL ADAPTER FOR ITEM 11 C/W LOCKNUT AND BUSHING19 50mm CONNECTOR FOR ITEM 12

20

21 75mm P.V.C. RIGID CONDUIT

22 75mm LIQUID TIGHT FLEXIBLE CONDUIT (NON METALLIC)

23 75mm P.V.C. 0-RING EXPANSION COUPLER24 75mm P.V.C. CONDUIT FITTING TYPE LB25 75mm P.V.C. 9026 75mm P.V.C. COATED STEEL PIPE STRAPS (1 HOLE)27 75mm FEMALE ADAPTER FOR ITEM 21

25 75mm TERMINAL ADAPTER FOR ITEM 21 C/W LOCKNUT AND BUSHING29 75mm CONNECTOR FOR ITEM 22

30

31 STUD, THREADED, FOR FASTENING TO STRUCTURAL STEEL OR CONCRETE, THREAD - 6mmø X 20mm

_______LONG, SHANK - 9mm LONG, HILTI TYPE EW6 H-20-9 P12 OR EQUIV.

32 JUNCTION BOX, NON-METALLIC, WATERPROOF, 100mm X 100mm X 100mm33 CABINET, TERMINAL, FOR C.T.'S & C.V.T.'S, FIBERGLASS TYPE 4X ENCLOSURE, C/W HINGED DOORS WITH

4 LATCHES, 610mm X 510mm X 200mm, HOFFMAN A24H2008GQRLP, & REMOVABLE INTERIOR STEEL

________MOUNTING PLATE, A-24P20 OR EQUIV.

34 ALUMINUM UNISTRUT, 1 5/8" X 1 5/8"

35 LIGHT, SUB-STATION, HALOPHANE-CAT-NO,--SU2A4OOMH24ALPR C/w BALLAST, MTG. BRACK. & PHOTOCELL36 LINE MATCHING UNIT (LMU)

NOTEUSE WITH DWG. NO.'S TSOS-O02-D02 TO TSO8-O02-D07.

TERMINALS PP'D. Collett

1lyoENGINEE

A D.0. Reeves

RING STANDARDS ISSUED 1997-04-15

1i UIT1 itIec ppei c fcs4zd DRAWN C. Harnum

or tisd m vhc c m xd vithoutCONDUITAND FITTINGS CHECKED G. O'Keefe

O.Uthberouhidedto ruposos prosecolion a contooct ,iTh }MO.

BILL OF MATERIALS DWG NoTSO8-002-DO1-R1

FINISHED GRADESUB-GRADE-

'. 1 CABLETRENCH

r HOLES TO BE CUT WITH HOLE SAW/ ONLY AND SEALED WITH GROUT OR

OTHER SUITABLE FILLER

1000p

CONDUIT ENTRANCE INTO CABLE TRENCH

FINISH GRADE lDOmm GRAVEL

P.V.C. CONDUIT

50 50(ii5 (MIN)

SECTION SHOWINGBURIED P.V.C. CONDUIT

REF:BILL OF MATERIALS #TSO8-D02-D01

D. CollettTERMINALS APP'D.

D. Reeves

"°j ENGINEERING STANDARDS

ISSUED 1997-07-15

DRAWN C. HarnumCONDUIT ARRANGEMENT CHECKED C. O'Keefe

BURIED CONDUIT DETAILS DWG. No. TSO8-002-D02-R1

00I0

PLOT 1:1

FINISHED GR/SUB -GRADI

EVINC 0

REF:BILL OF MATERIALS #TSO8-002-DO1

TERMINALSENGINEERING STANDARDS

CONDUIT ARRANGEMENT FORDISCONNECT SWITCH MOTOR OPERATOR

D. CollettAPP' 0.

0. Reeves

ISSUED 1997-04-15

DRAWN K.B.Rcketts

CHECKED C. O'Keefe

DWG. No. 1S08-002-D03-R0

PLOT 1:1

REMOVABLE CONDUIT PLATEI IN CONTROL CABINET. HOLES

LBECUT IN FIELD1

PLAN

CONTROL CABINET

CABLE TRENCH COVER(CUT ON SITE)

TRANSFORM EROUTLINE

CABINET

FINISHESUB-

FOOTING

CABLE TRENCH

FRONT ELEVATION

REF:BILL OF MATERIALS #TSO8-002-DO1

TERMINALSENGINEERING STANDARDS

CONDUIT ARRANGEMENT FORPOWER TRANSFORMER

D. CollettAPPD.

D. Reeves

ISSUED 1997-04-15

DRAWN C. Hornum

CHECKED G. OKeefe

DWG. No. TSO8-002-D04--R0

TRANSFORMEROUTLINE

PLOT 1:1

JTROLINET

SHED GRADE-GRADE

CABLE TRENCH

C.1

FINISHED GRA[SUB-GRADE

TO CABLETRENCH

SIDE ELEVATIONREF:BILL OF MATERIALS #TSO8-002-DO1

D. CollettTERMINALS APP'D.D. Reeves

'° I ENGINEERING STANDARDSISSUED 1997-04-15

DRAWN C. HarnumCONDUIT ARRANGEMENT CHECKED C. OKeefe

DEAD TANK CIRCUIT BREAKERDWG. No. TSO8-002-D05--RO

PLOT 1:1

bONI LLLVAIION

NOTE

SEENOTE 2

FINISHEDGRADE-

SUB-GRADE-

NOTES

TERM IN?CABINEI

..- a.

TO CABLE TRENCH

cIrr IIltAl

1. DIMENSIONS ARE GIVEN IN MILLIMETRES UNLESS OTHERWISE SPECIFIED

2. L.M.U. - INSTALLED ONLY WHEN WAVE TRAP INSTALLED WITH C.V.T.

3. TERMINAL CABINET, FIBERGLASS TYPE 4X ENCLOSURE, C/W HINGEDDOORS WITH 4 LATCHES, 610mm X 510mm X 200mm, HOFFMANA24H2008GQRLP, AND REMOVABLE STEEL MOUNTING PLATE, A-24P92OOR EQUAL.

4. ARRANGEMENT WILL VARY WHEN EQUIPMENT MOUNTED ON GIRDER.

5. 50mm CONDUIT AND FIUINGS FOR C.T. INSTALLATION.25mm CONDUIT AND FI1TINGS FOR V.T. INSTALLATION.

6. TWO - 50mm CONDUITS FOR C.T.'S. REF'ONE - 50mm CONDUITS FOR V.T.'S.BILL OF MATERIALS #TSO8-002-D01

I

TERMINALS APPD. I Hoynes

0. ReevesENGINEERING STANDARDS

________________________________________________________________________ISSUED 2002-05-01

CONDUIT ARRANGEMENT FOR DRAWN C. Harnum

C.T.'S, V.T.'S OR L.M.U.'S CHECKED G. OKeefe

ON STEEL STRUCTURE DWG. No. TSO8-002--D06-R1

PLOT 1:1

NOTE 6Trflrkrr t/Ir-tA,

GALVANIZEDSTEEL SUPPORT SEE(SUPPLIED BY NOTE 2CONTRACTOR)

STRUCTURE

00LI)

FINISHED GRADE FINISHED GRADEB-GRADESUB-GRADE

1 _______ _______ _______[::

SU

TO CABLE TRENCH

FRONT VIEW SIDE VIEW

NOTESDIMENSIONS ARE GIVEN IN MILLIMETRES UNLESS OTHERWISE SPECIFIED.

2. SUB-STATION LIGHT HALOPHANE CAT NO. SU2A400MH24TLFR c/w BALLAST,MOUNTING BRACKET AND PHOTOCELL.

REF:BILL OF MATERIALS #TSD8-002-DO1

D. CollettTERMINALS APP'D.

D. ReevesENGINEERING STANDARDS I

ISSUED 1997-04-15

DRAWN C. Hornum

CONDUIT ARRANGEMENT CHECKED C. OKeefe

SUB-STATION LIGHTDWG. No. TSO8-002-D07-RO

PLOT 1:1

450

FiNAL GRADE

...

WARNING

BACXF-.

• ••.. : -MECHANICAL

• .•.•.• •• PROTEOTION•

-r'.'IAED j$:. J

PRIMARYJ I IJ 1-75DUCT / / MIN.

SECONDARY1 L COMMUNICATIONDUCT DUCT

DIRECT BURIEDDUCT

650

FiNAL GRADE

H.:.ECT"

.

T. CdNCRErEI.

MMUNTIONDUCT DUCT

SECONDARYDUCT

CONCRETE ENCASEDDUCT

WARNINGTAPE

- MECHANICALPROTECTION

0

0uI

75' MIN.

COMMUNICATIONDUCT

SERVICE & TELEPHONEWENCH DETAILS

ROAD SURFACE

NO

• ,•

In. _1. CONCRETE TO HAVE A 28 DAY SPECIFiED STRENGTH OF 20 mpa WITH ••

MAXIMUM AGGREGATE SIZE OF 20mm AND MAXIMUM SLUMP OF 75mm..

•.• .1.2. CONCRETE ENCASED DUCTS SHALL BE SUPPORTED BY APPROVED

0 •..

. ..'....

SPACERS PLACED AT 1200mm INTERVALS. NO WiRES OR METAL liES .-SELEARE TO BE USED. •

3. USE 125mm DIA. DUCT FOR EACH RUN OF PRIMARY CABLE AND 50mm • •

DLA. DUCT FOR EACH RUN OF SECONDARY CABLE... •

•.• :4. INSTALL MINIMUM #12 FISH WIRE IN EACH DUCT AND SECURELY CAP -

•••• .•.

BOTH ENDS. . D.CONCfJE

5. ALL FIlliNGS, COUPUNGS, ETC. ARE TO SE SOLVENT WELD.-

6. SPARE DUCTS SHALL BE INSTALLED AS REQUIRED.a

• A• •

7. ELECTRICAL DUCT SHALL BE PVC TYPE 08-2 OR APPROVED EQUIVALENT. - :8. BARE COPPER NEUTRAL SHALL BE INSTALLED.

-...

9. ThE DIMENSIONS FOR TRENCH WIDTH AND DEPTH ARE TYPICALDIMENSIONS AND MAY CHANGE DUE TO EXCAVATING EQUIPMENT, FiELD 200 200 200CONDITIONS AND NUMBER OF CIRCUITS REQUIRED.

10. All DIMENSIONS ARE GIVEN IN MIWMETERS. 4 DUCT BANKDETAILS

ROl- I -

JwThis Dmog ctthss iIte1Ieth otçity of Nefc1thJIdofLrMjOthbeced

or it,c4e or ii jt rihout çioco frun RO. Use of U ho reslrktodto porpo of secutiou of a coobuct tith IMXIO.

DISTRIBUTIONENGINEERING STANDARDS

UNDERGROUND DUCT TRENCHDETAILS

WARNINGTAPE

125 PVCTYPE ES-iDUCT (i'YP.)

NEUTRAL

SPARE

APP'D.

1. GARDINER

ISSUED 201 0-03-30

DRAWN C. MURPHY

CHECKED B. NOBLE

DWG. No. DI-18--15-RO

AS REQUIRED

FINAL GRADE

••In

SELElTRACKF1LL-

5OmmPVC:DUCT -

SECONDARY OUCT

PLOT SCALE 1:1 CAD