Underground Distribution Construction Manual Version 24 · 2020-07-24 · faces the footpath). 8. ... design / installation of bollards: - ... open to ventillation in front and no

© ENERGEX Limited 2020 ABN 40 078 849 055

MANUAL 00305

Underground Distribution Construction Manual

Section C3 – Padmount Transformer Sites

Approved by: A. Bletchly

This drawing must not be

C COPYRIGHT 2011 ENERGEX

whole without writtenpermission from ENERGEX

reproduced in part or

UNDERGROUND DISTRIBUTION CONSTRUCTION MANUAL

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PADMOUNT TRANSFORMER SITESSECTION INDEX

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P.BARNEY

F.AMANPOORA

SECTION C3 - PADMOUNT TRANSFORMER SITES

CIVIL WORKS

1Location over Basement3.7

4Retaining Walls-Sloping Sites3.6

1Concrete Surrounds3.5

1Spare3.4

2Foundation Details-Pier3.3

1Foundation Details-Standard Uniculvert 3.2

1Sloping Site-Maximum Cut & Fill3.1

RECTANGULAR TYPE

2Location over Basement2.7

4Retaining Walls-Sloping Sites2.6

1Concrete Surrounds2.5

1Uniculvert Foundation-Lifting & Handling2.4

2Foundation Details-Pier2.3

1Foundation Details-Standard Uniculvert 2.2

2Sloping Site - Maximum Cut & Fill2.1

SQUARE TYPE

9General Requirements1

GENERAL REQUIREMENTS

SheetsDescriptionSub-Sect.

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PADMOUNT TRANSFORMER SITES

GENERAL SITE REQUIREMENTS

6229-A4 H

C3 11 9

UDC-C3-1-1H.DWG

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4m

minim

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The required recessed area (clearance zone) is defined below.

and shall be surveyed and dedicated as part of the road reservation.

Padmounted substation sites shall be recessed in the property alignment

1. Site

PADMOUNTED SUBSTATION INSTALLATION

PADMOUNT TYPE(width & depth)

All estate clear road reserve

sloping site with retaining wall

4.8m x 5.0m for flat site &SQUARE TYPE COMMON EARTH

12.6m x 8.9mSQUARE TYPE SEPARATE EARTH

sloping site with retaining wall

4.6m x 6.7m for flat site &

EARTH

RECTANGULAR TYPE COMMON

11.7m x 9.9mEARTH

RECTANGULAR TYPE SEPARATE

ring main unit, HV metering unit or other ground mounted HV equipment.

10m from a distribution transformer (eg padmount or ground transformer),

an external fire hydrant or Fire Booster Station shall not be installed within

Note also for the requirement in AS2419.1 - Fire Hydrant Installation that

AS 2430 - Classification of hazardous areas

AS/NZS 2229.2 - Fuel Dispensing Equipment for Explosive Atmospheres.

AS 1940 - Storage & handling of flammable and combustible liquids

AS/NZS 1596 - LP Gas - Storage & Handling

Designers must refer to the following standards:

service stations, flammable gas or liquid storage tanks shall be avoided.

The siting of padmount transformers in the vicinity of public swimming pools,

HAZARDOUS AREAS AND HYDRANTS

shall be maintained to the real property boundary.

A minimum of 900 mm clear access around the substation sides and back

parallel as possible to the real property street alignment.

The front edge of the substation plinth shall be 1300 mm from and as near to

For substation site on a truncated section of the street alignment;

TRUNCATED STREET ALIGNMENT

refer Supply & Planning Manual - Sect 3.2 - clause 3.2.6.1

oil volumes above 500L but less than 2000L in sensitive areas,

Guidelines for locating padmount and ground transformers with

zone in this case is not dedicated as part of the road reserve.

in front of the HV end to allow for 2m clear operating zone. Note the clearance

for electric cables and conduits. They should also allow an additional 700mm

Landlocked padmount sites shall also have appropriate easements

possible from the shoreline and sheltered from salt spray.

For coastal areas, substation site must be located as far as

or the Defined Flood Level (DFL), whatever is higher.

transformers, and ring main units shall be installed above the 1:100 year

All new distribution network padmounted transformers, ground mounted

(to address audible noise, EMF requirement, and fire and explosion risk).

construction area to edge of padmounted substation enclosure

- 4 metres minimum from edge of permissible residential dwelling

- Where possible free from steep batters

- Level topography

- Stable soil conditions

The site shall be a location with:

- have 2000mm dedicated clear area directly in front of the plinth.

street alignment or,

- recessed so that the concrete plinth is 1300mm from the R.P.

Square padmount substations shall be centrally positioned and;

common earthing requirements are satisfied.

developer / consultant can prove (via test certificates) that

Provision for separate earthing is always required unless the

Square Padmounts are preferred.

All dimensions are clear internal dimensions.

Uncontrolled Document When Printed

For 200 to 500kVA 11kV433 250V, concrete bored pier foundations may be used.For 750 to 1000kVA 11kV/433 250V, use the uniculvert foundation type if applicable.Concrete bored piers shall be constructed in accordance with the construction drawings.

7. Substation OrientationFront entry substations shall be oriented such that the LV and HVpanels are easily accessible from the dedicated footpath.(ie. Doorfaces the footpath).

8. Backfilling And Final Restoration Of SurfaceAll backfill of the padmount substation site must be compactedbefore final restoration of the site surface. Sealing of the cableapertures in the precast concrete plinth and construction of theconcrete surround slab over the ground surface shall be inaccordance with the construction drawings.

9. Spacing Between Padmount Substation And Other MetalObjects9.1 Separate Earthing Sites The distance between the edge of

the plinth and the consumer's building/residences, fences, LV switchboard earth and metal builder's poles, shall be a minimum of 5 metres at sites where separate LV and HV earthing systems are installed.

The additional area shall be road reserve or an easement to prevent encroachment. The distance between the edge of the earth grid and Telstra's plant and equipment shall be 15 metres at sites where separate LV and HV earthing systems are installed.

9.2 Common Earthing Sites The distance between the edgeof the earth grid and Telstra's plant and equipment shall be 2 metres at sites where common earthing systems (CMEN) are installed

10. Commercial and Industrial InstallationsSubstations shall be located in areas where a mobile crane can easily access the site to install and replace a substation at any time of the night or day, seven days a week.

Energex cable conduits for the development may be placed in the substation site and shall pass down the sides or through the uniculvert foundation. No conduits shall pass under the uniculvert foundation. Conduits shall be 750 mm minimum depth below the finished surface level. Ensure end wall knockouts are grouted with a high strength sand and cement grout after conduit/cable installation through uniculvert foundation.

The site surface is to be finished with a concrete slab (refer site construction drawings). The 2.0m wide apron in front of the substation cabinet shall be finished with a concrete slab sectioned with construction joints for easy removal to excavate.

11. Padmounted Substations in Landscaped AreasSubstations in a landscaped area shall have a formed pathway from the footpath real property street alignment to the substation site. This is to provide safe access to the site for field personnel.When planting vegetation in landscaped areas and gardens, take into consideration the fully matured size of vegetation, ensuring access to the site, one metre clear access around the sides and back of the substation is maintained and 2m clear access to the front of the substation is maintained.


Site surface to be finished with concrete slab (as per construction

drawings). The 2.0 metre wide apron in front of the substation

cabinet shall be finished with a concrete slab sectioned with

construction joints for easy removal to excavate.

The formed pathway is to be a concrete slab (refer to the

construction drawings). The concrete pathway slab shall be clear of

cables and conduits to the substation.

The surface of the pathway slab may be finished with clay brick

pavers or concrete tiles over the slab. Installation to be in

accordance with the paver/tile manufacturer's installation

specification.

ENERGEX cable conduits for the development may be placed in

the substation site and shall pass down the sides or through the

uniculvert foundation. No conduits shall pass under the uniculvert

foundation. Conduits shall be 750 mm minimum depth below the

finished surface level. Ensure end wall knockouts are grouted with

a high strength sand and cement grout after conduit/cable

installation through uniculvert foundation.

12. Padmounted Substation Installation in Council Parks

Substations located in Council parklands, shall be installed as per

constructions drawings (refer C3.1 Sheet 5).

13. Bollards Around Padmounts

Bollards shall be installed where padmounts are installed in car

parks or other areas where padmounts are likely to be impacted by

vehicles. The following outlines the minimum requirement for the

design / installation of bollards: -

· Shall be manufactured of 5.6mm thick gal steel (medium)

· Circular tube min 140mm OD filled with concrete and capped.

· Buried 720mm in 400 x 400 x 720(D) concrete pad

· Installed 900mm above ground at 1.5m centres.

14. Enclosures Around Padmounts

A padmount can be enclosed on three sides by walls, but will be

open to ventillation in front and no encumbrance above the site. If

doors are required at the front, they will be louvered to allow air flow

into the padmount, and all signs on the front of the padmount to be

duplicated on the doors. Minimum door opening width 3.0m.

15. Structures Adjacent To And Overhanging Padmounts

· No building or permanent structure is allowed within 5m vertical

clearance above ground level of the padmount transformer site.

· The LV side of the padmount should be positioned away from

offices and livable areas.

· Where possible maintain 4m separation from transformer plinth to

offices and livable areas

16. Multiple Padmount Transformer Site

Substations with two padmount transformers at a single site are

acceptable under the following conditions:

· Layout as per drawing C3-2.1 Sheet 2.

· No more than two square type padmount transformers

· Not for industrial applications, or where standard HV switchgear in

padmount is unacceptable.

· No dual padmount sites over basements

· LV switchboards to be isolated or connected by castel key

interlocks to prevent paralleling.

17. Access to Padmount Transformer Site

Site access to padmount site - 4m wide x 5m high. To suit Franna

T25 crane or flatbed truck. Access track to support crane with axle

loads up to 10 tonne.











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GENERAL SITE REQUIREMENTSRETAINING WALLS - GENERAL REQUIREMENTS

6229-A4 C

C3 19 9

UDC-C3-1-9C.DWG

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Drainage syste

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weep holes updated

FOUNDATION

CORE FILLING

F’c SLUMP MAX. AGG.

25 MPa 75mm 20mm

17.5 MPa 150mm 10mm

handle water movement through the conduits and trenches.

and quantity of water expected additional drainage may be required in front of the padmount site to

Depending on site conditions (i.e. arrangement of the slope relative to the retaining wall and trench)

Weep-holes must be provided in the retaining wall as per the notes below.

proper storm water drainage system.

the pipe must extend beyond the ends of the wall unless the pipe is connected to a

PVC agricultural pipe with geo fabric sock located at the base of the wall. The outlets of

width of 300mm immediately behind the wall with a continuous 100mm diameter slotted

- a drainage system within the soil - this shall be achieved by placing gravel to a minimum

- sealing the soil surface - this is achieved by the site finish.

saturated. These steps shall include:

It is essential that steps be taken to prevent the soil behind the wall from becoming

9. DRAINAGE SYSTEM

Hard-drawn steel wire reinforcement fabric complying with AS 1303 and AS/NZS 4671.

Hot rolled deformed bar - �TEMPCORE� complying with AS/NZS 4671.

8. REINFORCEMENT

shall be poured MONOLITHICALLY (in one operation).

Concrete foundation slab with continuous reinforcement over lapped at joints

Concrete work shall comply with AS 3600 and the following table:

7. CONCRETE

be placed under the concrete foundation.

a 100 mm layer of compacted sand or gravel, bedding material shall

Where the bearing surface under the foundation is silt or clay soil;

6. FOUNDATION

accordance with the construction drawings.

within the enclosure shall be backfilled, compacted, levelled and finished in

After installation of the substation and cables has been completed the ground

in the Modified Compaction Test to AS 1289.5.2.1.

Backfill shall be compacted to 95% of the maximum dry density as defined

withstand backfilling loads.

(14 days minimum for 17.5 MPa concrete) so as to have sufficient strength to

Backfill should not be placed or compacted until the wall has cured

drainage characteristics.

Clay soils and organic silts shall not be used as backfill as they have poor

10. BACKFILLING

shall be provided to remove water from the area of the toe of the wall footing.

level below the wall. When necessary a collecting system e.g. spoon drain

apart horizontally. The lowest row should be just above the finished ground

two horizontal rows, spaced not more than 1.5m apart vertically and 1.5m

For walls exceeding 1.4m weep-holes shall be provided in a minimum of

minimum of one horizontal row, spaced not more than 1.5m apart horizontally.

For walls less than 1.4m in height weep-holes shall be provided in a

WEEP-HOLES






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SQUARE TYPESLOPING SITE - MAXIMUM CUT & FILL

6229-A4 E

C3 2.11 2

UDC-C3-2.1-1E.DWG

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P.BARNEY

F.AMANPOORA

SECTIONA-

NOTE:

For SEPARATE LV & HV earthing a clearance zone of

12.6m wide by 8.9m deep is required.

The clearance zone is to be maintained free from

metallic objects, buildings and structures, including their

foundations.

DA

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sheet 1 of 2

FO

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Boundary of RoadReserve area

12600 (S

EP

AR

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E E

AR

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4800 (

CO

MM

ON E

AR

TH)

8900 (SEPARATE EARTH)

5000 (COMMON EARTH)

1300

800

PLAN

shown dashedOutline of plinth

150 M

AX

(CU

T - see N

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R.P. StreetAlignment

150 M

AX

(FIL

L - see N

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shall be designed in accordance with C3-2.6. drainage have been considered. Sites requiring retaining walls RPEQ certified design to ensure levels, compaction standards,6. Cut and fill levels greater than 150mm will required a Civil

not encroach onto the substation site.5. Mature landscaping (including trees, sprinklers etc.) shall

finished with a concrete slab, refer C3-2.5.4. After installation is complete the site surface is to be

Energex’s personnel and heavy equipment.3. Clear access to the transformer shall be maintained for

pass through this substation site.2. No services other than the Energex’s electric cables shall

surrounding area graded to ensure no water ponding.1. Energex’s padmount clearance zone shall be levelled and






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DUAL PADMOUNT TRANSFORMER SITES

SQUARE TYPESLOPING SITE - MAXIMUM CUT & FILL

6229-A4 C

C3 2.12 2

UDC-C3-2.1-2C.DWG

C.Lee

30-10-14

J. Lansley

A. AnandA

SECTIONA

-

NOTES:

objects, buildings and structures, including their foundations.

The clearance zone is to be maintained free from metallic

wide x 8.9m deep is required.

For separate LV & HV earthing a clearance zone of 16.6m

FO

OTP

AT

H

Boundary of RoadReserve area

16600 (S

EP

AR

AT

E E

AR

TH)

5000 (COMMON EARTH)

1300

800

PLAN

shown dashedOutline of plinth

150 M

AX

CU

T

R.P. Street

Alignment

150 M

AX

FIL

L

-A

-A

Clearance Zone

4000

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8900 (SEPARATE EARTH)8800 (

CO

MM

ON E

AR

TH)

retaining walls shall be designed in accordance with C3-2.6.

standards, drainage have been considered. Sites required

RPEQ certified design to ensure levels, compaction

9. Cut and fill levels greater than 150mm will require a Civil

8. Separation between centers of uniculvert is 4000mm.

C3-2.2 for standard uniculvert foundation details.

7. Refer Energex underground distribution construction drawing

encroach onto the substation site.

6. Mature landscaping (including trees, sprinklers etc.) shall not

with a concrete slab, refer C3-2.5.

5. After installation is complete the site surface is to be finished

Energex’s personnel and heavy equipment.

4. Clear access to the transformer shall be maintained for

the space between two padmount transformers.

3. No services other than Energex’s earth grid shall pass through

pass through this substation site.

2. No services other than the Energex’s electric cables shall

surrounding area graded to ensure no water ponding.

1. Energex’s padmount clearance zone shall be levelled and










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SQUARE TYPECONCRETE SURROUNDS

6229-A4 D

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UDC-C3-2.5-1D.DWG

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H

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N J

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PLAN

Foundation

Uniculvert

SECTION A

FO

OTP

AT

H

4800

-A

Concrete Edge

Beam

R.P. Street

Alignment

5000

Fall

Fall

Fall

Fall

Fall

Fall

LV

HVPADMOUNTED

SUBSTATION

around plinth

Reinforced concrete

surround slab cast

100mm x 10mm

Expansion joint foam

(Abelflex or equivalent)

Plinth

1300

Real Property

Boundary

(Level Site)thick concrete slab.

Un-reinforced 100/125mm

50mm below top of

Bottom of plinth

concrete surround

excavated area.

Refer Note 1.

Backfill & compact

GroundLevel

Finished

150mm wide cover

strip under concrete

edge beam and over

earth grid

Fall

A-

SECTION

-B

Fall FallFall

Concrete edge beam

150 wide x 150 deep

below finished surface

level to perimeter.

100 50

B-

barrier to front

Polyethylene

of aperture

and 100mm non-reinforced

concrete surround

See Detail ’A’

on Sheet 2






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SQUARE TYPECONCRETE SURROUNDS

6229-A4 A

C3 2.52 2

UDC-C3-2.5-2A.DWG

A. BLETCHLY

22/01/19

K. SLATER

T. BORGA

(Use textcrete or equivalent product. Construct to supplier’s specifications).

6. The surface of the surround slab may be finished with a stencil pattern surface to match the surrounding pavements of the development.

5. Cable apertures through the precast concrete plinth shall be backfilled to 50mm from the top of the plinth, using bedding material.

4. The concrete slab is to slope away from plinth falling at a slope of 1 in 25.

3. The top face of the concrete surround slab shall be 25mm above the final surface level (when turf is laid).

d) Finish by wood float or by nylon broom.

c) 25 MPa grade concrete;

b) F62 mesh reinforcement in centre of slab;

a) 100 / 125mm thick slab;

2. Reinforced concrete surround slab:

Ensuring that only bedding material is used around cables.

1. Backfill excavated area with crusher dust,deco or bedding material and compact in place.

Reinforced concrete

Plinth

Concrete

100

150

9

Ø12

foam 100 x 10

Expansion joint

100

100

NOTES:

foam 100 x 10

Expansion joint

100

concrete

Non-reinforced

DETAIL ’A’






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SQUARE TYPERETAINING WALLS - CUT SLOPING SITE UP TO 1200mm CUT

6229-A4 D

C3 2.61 4

UDC-C3-2.6-1D.DWG

R. ENGLISH

10/10/08

P.BARNEY

F.AMANPOORA

Backfill Material

Road reserve

through footing

for earth rod

Boundaryreserve

Weepholes

Filter Material

Natural

boundary

Backfill

foundationUniculvert

groundlevel

Footpath

C3-1 Sheet 7

Scale 1:50

SECTION A

Finishedsubstationlevel

ground level

wall foundation

Masonryblock wall

For earth rod

Section E2.4.1

location refer

A

Footpath

Retaining

Road reservealignment

PLAN

75 cover bottom

N12-300 ctr lap 400

SL62 mesh with

N16-400

60 cover top

DETAIL

Scale 1:25

1

Aggregate Size (Max)

20mm

10mm

N16-400 cts lap 500

200 series blockwork

Concrete infill to be

at corners & where

watershed cappingrounded to form

N16-400 cts

A

Core Filling

Blockwork/

Concrete Strengths

Footing

Slump

25MPa

17.5MPa

F’c

150

75

Ground Level

Backfill

Material

Material

Drainage

Natural

Cement

300kg/cu. m

Content (Min)

-

1200 M

ax

55 cover300

850

50

250

600 Min

600 Lap

necessary

5000

4800

4400

4800

RoadFence - refer Section

DA

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Weep h

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syste

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Weep-holes

100mm slotteddrainage pipe






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SQUARE TYPERETAINING WALLS - CUT SLOPING SITE 1200mm-2600mm CUT

6229-A4 D

C3 2.62 4

UDC-C3-2.6-2D.DWG

R. ENGLISH

10/10/08

P.BARNEY

F.AMANPOORA

Backfill

Drainage

NaturalGround Level

N12-300

N16-400 cts lap 500at corners & where necessary

75 cover bottom

SL62 mesh with60 cover top

N20-400

rounded to form


Concrete infill to be

watershed capping

ctr lap 400

N16-400 cts


Material

Material

NTS

DETAIL 1

CONCRETE STRENGTHS REFER SHEET 1

Weep holes

50

2600 M

ax

300

2000

800 Lap

55 cover300

1100

1500 M

ax

substation

C3-1 Sheet 7


Backfill

Footpathgroundlevel

through footing

for earth rod

Scale 1:50

SECTION A

Filter

Weepholes

ground level

Backfill

Natural

levelBoundary

location refer

Masonryblock wall

Section E2.4.1

Footpath

A

For earth rod

PLAN

Finished

Road reserve

boundaryRoad reserve

A

Retaining wall foundation

alignment

100

Road reserve

Fence refer Section

5000

4700 or 4800

4200 or 4

400

4800

5000

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Drainage s

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SQUARE TYPERETAINING WALLS - FILLED SLOPING SITE UP TO 1.0m FILL

6229-A4 D

C3 2.63 4

UDC-C3-2.6-3D.DWG

R. ENGLISH

10/10/08

P.BARNEY

F.AMANPOORA

DETAIL 1

N12-40060 cover top

N12-300

N12-400

450 LapN12-400

watershed capping

Concrete infill to berounded to form

blockwork200 seriesBackfill Material

Drainage Material

75 bottom cover300 Cog

N12-400

Concrete Strengths

17.5MPa

25MPa

F’c

Footing

Blockwork/

Core Filling

Slump

150

Cement

300kg/cu. m

Content (Min)

-20mm

10mm

Aggregate Size (Max)

75

200

1000 M

ax

200

500 Lap

300

50

55 cover

300

850

substationC3-1 Sheet 7


Backfill

Footpathgroundlevel

through footing

for earth rodSECTION A

levelNatural ground

level Boundary

location refer

Masonryblock wall

Section E2.4.1

Footpath

A

For earth rod

PLAN

Finished

Road reserve


A


alignmentRoad reserve

Fence refer Section

5000

4800

4400

4800

DA

TE

APP

D

CK

D

DR

ND23.0

1.19

A. BLET

CHL

Y

B. B

RU

NS

MA

NN

T. B

OR

G

Drainage s

yste

m a

nd

weep h

oles u

pdated

Weep-holes100mm slotteddrainage pipe






ORIGIN

AL ISS

UE

DATE

APP’D

SECTION SUB-SECT.

CAD

RECD

CKD

DWN

SHT OF

FILE

CIVIL WORKS


SQUARE TYPERETAINING WALLS - FILLED SLOPING SITE 1.0 - 1.8m FILL

6229-A4 D

C3 2.64 4

UDC-C3-2.6-4D.DWG

R. ENGLISH

10/10/08

P.BARNEY

F.AMANPOORA

N16-400

75 cover bottomN16-400

N12-400450 Lap

Eachway

Backfill Material

Drainage Material

60 cover top

200 seriesblockwork

rounded to form Concrete infill to be

watershed capping

DETAIL 1

300 Cog

N16-400

Blockwork/150

Core Filling17.5MPa

75

Slump

Footing

F’c

25MPa

Concrete Strengths

300kg/cu. m10mm

-

Content (Min)Cement

Size (Max)Aggregate

20mm

1800 M

ax

250

600 Lap

200

5055 cover

300

300

substation

C3-1 Sheet 7


Backfill

Footpathgroundlevel

for earth rod

levelNatural ground

level Boundary

location refer

Masonryblock wall

Section E2.4.1

Footpath

A

For earth rod

PLAN

Finished

Road reserve


4400

4800

A


alignmentRoad reserve

5000

Fence refer Section

See Detail 1

SECTION A

4800

DA

TE

APP

D

CK

D

DR

ND23.0

1.19

A. BLET

CHL

Y

B. B

RU

NS

MA

NN

T. B

OR

G

Drainage s

yste

m a

nd

weep-holes u

pdated

Weep-holes









ORIGIN

AL ISS

UE

DATE

APP’D

SECTION SUB-SECT.

CAD

RECD

CKD

DWN

SHT OF

FILESLOPING SITE - MAXIMUM CUT & FILL

CIVIL WORKS


RECTANGULAR TYPE

6229-A4 C

C3 3.11 1

UDC-C3-3.1-1C.DWG

R. ENGLISH

10/10/08

P. BARNEY

F. AMANPOORA

DA

TE

01.04.2

020

CA. BLET

CHL

Y

B.B

RU

NS

MA

NN

APP

D

CK

D

DR

N

(750 a

pprox t

o 1810).

corrected.

access dim

ensio

ns

Rect p

mt width a

nd side

T. B

OR

G

HV

150 M

AX.

CU

T

4600

LC

= =

= =

980

1810 A

ppro

x

Road Reserve area

SECTION

6700

PLAN

3000

Align

ment

R.P. Street

150 M

AX.

FIL

L

Station

Padmount

Boundary of

LVFO

OTP

AT

H

1500

-A

-A

-A

RESIDENTIAL SITES

installation of more numerous network LV cables.

more frequently used LV section and ease of

This arrangement will allow maximum space for the

LV terminals shall be installed closest to the street.

NOTES:

retaining walls shall be designed in accordance with C3-2.6.

standards, drainage have been considered. Sites required

RPEQ certified design to ensure levels, compaction

6. Cut and fill levels greater than 150mm will require a Civil

encroach onto the substation site.

5. Mature landscaping (including trees, sprinklers etc.) shall not

with a concrete slab, refer C3-3.5.

4. After installation is complete the site surface is to be finished

Energex’s personnel and heavy equipment.

3. Clear access to the transformer shall be maintained for

pass through this substation site.

2. No services other than the Energex’s electric cables shall

surrounding area graded to ensure no water ponding.

1. Energex’s padmount clearance zone shall be levelled and











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Underground Distribution Construction Manual Version 24 · 2020-07-24 · faces the footpath). 8. ... design / installation of bollards: - ... open to ventillation in front and no