Withdrawal of ESM 102 Communication Outdoor Cabling · Subject: Withdrawal of ESM 102 Communication Outdoor Cabling This technical note is issued by the Asset Standards Authority

TN 041: 2014

3244595_1 Asset Standards Authority © State of NSW through Transport for NSW Page 1 of 1

For queries regarding this document [email protected]

www.asa.transport.nsw.gov.au

Technical Note TN 041: 2014

Issued date 30 April 2014 Effective date 30 April 2014

Subject: Withdrawal of ESM 102 Communication Outdoor Cabling

This technical note is issued by the Asset Standards Authority as a notification to remove from

use RailCorp document ESM 102 Communication Outdoor Cabling, Version 2.0.

ESM 102 is a legacy document and should be used for reference purposes only. ASA standard

T HR TE 01001 ST Communication Outdoor Cabling, Version 1.0 supersedes this document.

Authorisation

Technical content prepared by

Checked and approved by

Interdisciplinary coordination checked by

Authorised for release

Signature

Name Ian Bonner Trevor Payne David Spiteri Graham Bradshaw

Position Principal Engineer Rail Application

Lead Telecommunications Engineer

Chief Engineer Rail Principal Manager Network Standards & Services

mailto:[email protected]

http://www.asa.transport.nsw.gov.au/

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COMMUNICATION OUTDOOR CABLING STANDARD

ESM 102

Engineering Standard Telecommunications

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Version 2.0

Issued July 2011

Owner: Chief Engineer, Telecommunications

Approved by:

J Byron Chief Engineer Telecommunications

Authorised by:

J Byron Chief Engineer Telecommunications

Disclaimer

This document was prepared for use on the RailCorp Network only.

RailCorp makes no warranties, express or implied, that compliance with the contents of this document shall be sufficient to ensure safe systems or work or operation. It is the document user’s sole responsibility to ensure that the copy of the document it is viewing is the current version of the document as in use by RailCorp.

RailCorp accepts no liability whatsoever in relation to the use of this document by any party, and RailCorp excludes any liability which arises in any manner by the use of this document.

Copyright

The information in this document is protected by Copyright and no part of this document may be reproduced, altered, stored or transmitted by any person without the prior consent of RailCorp.

UNCONTROLLED WHEN PRINTED Page 1 of 18

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T RailCorp Engineering Standard — Telecommunications Communication Outdoor Cabling Standard ESM 102

© RailCorp Page 2 of 18 Issued July 2011 UNCONTROLLED WHEN PRINTED Version 2.0

Document control

Version Date Summary of change 1.0 September 2007 First issue 2.0 July 2011 Application of TMA 400 format. Changes as noted in

summary of change table below.

Summary of changes from previous version

Summary of change Section

Scope and application 2

Optical fibre cable construction 5.3.2

Diverse cable routes 6.8

Update sections on number of conduits for new projects 7

Pit and pipe cable route construction 8

Incorporate deployment of pre-cast concrete pits for cable route construction (new) 8.2

Distance between pits (new) 8.2.5

Mandrelling (new) 8.3

Draw rope in conduits (new) 9.1

Recovery of de-commissioned cables (new) 9.2

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Contents

1 Introduction .............................................................................................................................5 2 Scope and application............................................................................................................5 3 References...............................................................................................................................5 3.1 Australian standards .................................................................................................................5 3.2 International standards..............................................................................................................6 3.3 RailCorp documents..................................................................................................................6 3.4 RailCorp drawings.....................................................................................................................6 4 Terms and definitions.............................................................................................................7 5 Cables and cabling works - general......................................................................................7 5.1 Cables .......................................................................................................................................8 5.2 Composite cables......................................................................................................................8 5.3 Optic fibre cable ........................................................................................................................8

5.3.1 SMOF fibre specification............................................................................................8 5.3.2 Optical fibre cable construction .................................................................................8 5.3.3 Optical fibre cables sizes...........................................................................................8

5.4 Copper communications cable..................................................................................................9 5.4.1 Copper cable (outdoor)..............................................................................................9 5.4.2 Fire safe copper cable (for tunnels)...........................................................................9 5.4.3 Cable identification codes........................................................................................10

6 Cable route – general............................................................................................................10 6.1 Compliance to SPG 0705........................................................................................................10 6.2 Cable route life span ...............................................................................................................10 6.3 Cable route construction types ...............................................................................................10 6.4 GLT .........................................................................................................................................10 6.5 Tracing of cable route location................................................................................................11 6.6 Aerial cable .............................................................................................................................11 6.7 Separation from other services ...............................................................................................11

6.7.1 Separation from HV - additional requirements ........................................................11 6.8 Diverse cable routes ...............................................................................................................12

6.8.1 Diversity via different rail line (ring diversity) ...........................................................12 6.8.2 Diversity via path off the rail corridor .......................................................................12 6.8.3 Diversity provided by parallel pit and pipe, GST troughing etc................................12 6.8.4 Aerial routes as diverse cable routes ......................................................................12 6.8.5 HV Power Cables route as diverse cable route.......................................................12 6.8.6 Signal cable route as diverse cable route................................................................12

6.9 Hazardous locations................................................................................................................13 6.9.1 Catch points.............................................................................................................13 6.9.2 High voltage locations..............................................................................................13 6.9.3 Construction rules for Hazardous EPR Zones ........................................................13

7 Cable route capacity .............................................................................................................13 7.1 Pit and pipe capacity ...............................................................................................................14 7.2 GST capacity...........................................................................................................................14

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8 Pit and pipe cable route construction.................................................................................14 8.1 Conduits ..................................................................................................................................14

8.1.1 Open-cut trenching and conduit installation ............................................................15 8.1.2 Reference design drawings of typical installations..................................................16

8.2 Pre-cast concrete pits .............................................................................................................17 8.2.1 Compliance to SPM 0123........................................................................................17 8.2.2 Pre-cast concrete pit location ..................................................................................17 8.2.3 Identification of pits and pit ID numbers ..................................................................17 8.2.4 Where pits are required ...........................................................................................17 8.2.5 Distance between pits..............................................................................................17 8.2.6 Protection of pits and pit lids....................................................................................18

8.3 Mandrelling..............................................................................................................................18 9 Operation and maintenance of duct space ........................................................................18 9.1 Draw rope, cleaning and sealing of conduits ..........................................................................18 9.2 Recovery of de-commissioned cables ....................................................................................18 10 Historical names ...................................................................................................................18 11 Documentation ......................................................................................................................18

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1 Introduction This standard sets out minimum requirements for the provision, installation, termination and management of outdoor communications cables within the RailCorp Communications network.

The requirements of this standard are in addition to the Australian Standards, they do not replace them. If there is a conflict between this standard and the Australian Standards, then the Australian Standards shall be adhered to and the Chief Engineer, Telecommunications, of Chief Engineers Division shall be notified immediately.

It applies to all new RailCorp Telecommunications outdoor cabling.

2 Scope and application This standard establishes requirements for all new outdoor RailCorp telecommunications network cables, including re-configuration of the existing outdoor cabling network. For the purpose of this standard, cabling in tunnels is considered to be outdoor cabling.

Additional requirements to those specified in this standard also apply for special situations such as cables in tunnels, aerial cable, cables associated with high voltage installations.

3 References

3.1 Australian standards

AS/CA S008 Requirements for customer cabling products

AS/ACIF S009 Installation requirements for customer cabling (Wiring Rules)

AS/NZS 1660.5.2 Test methods for electric cables, cords and conductors - Fire tests - Measurement of smoke density of cables burning under defined conditions

AS/NZS 1660.5.3 Test methods for electric cables, cords and conductors - Fire tests - Determination of the amount of halogen acid gas evolved during the combustion of polymeric materials taken from cables

AS/NZS 1660.5.4 Test methods for electric cables, cords and conductors - Fire tests - Determination of degree of acidity of gases evolved during the combustion of materials taken from electric cables by measuring pH and conductivity

AS/NZS 3000 Electrical Installations (Australian/New Zealand Wiring Rules)

AS/NZS 3085.1 Telecommunications installations - Administration of communications cabling systems. Part 1 Basic requirements

AS/NZS 3500.2 Plumbing and drainage Part 2: Sanitary plumbing and drainage

SAA HB 100 (CJC 4) Coordination of Power and Telecommunications – Manual for the establishment of safe work practices and the minimization of operational interference between power systems and paired cable telecommunications systems

SAA HB 101 (CJC 5) Coordination of Power and Telecommunications – Low Frequency Induction (LFI) – Code of practice

SAA HB 102 (CJC 6) Coordination of Power and Telecommunications – Low Frequency Induction (LFI) – Application guide

SAA HB 243 Communications Cabling Manual Module 1: Australian regulatory arrangements

SAA HB 29 Communications Cabling Manual Module 2: Communications cabling handbook

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3.2 International standards

ITU-T G652 Characteristics of a single-mode optical fibre & cable

ITU-T G655 Characteristics of a non-zero dispersion-shifted single-mode optical fibre & cable

ITU-T G657 Characteristics of a bending loss insensitive single-mode optical fibre & cable for the access network

3.3 RailCorp documents

EP 00 00 00 08 SP Safe Limits of DC Voltages

EP 90 10 00 03 SP Co-ordination of Communications and Power Systems - Earth Potential Rise

ESC 540 Service Installations w the Rail Corridor

ESM 105 Signalling Bungalow Communications Cabling Standard

ESM 107 Communications Equipment Rooms

ESM 109 Communications Earthing and Surge Suppression Standard

SPC 207 Track Monitoring Requirements for Under Track Excavation

SPG 0705 Construction of Cable Route & Associated Civil Works

SPM 0123 Reinforced Pre-cast Concrete Cable Pits

SPM 0677 Single-Mode Optical Fibre Cable

SPM 0885 Aerial Non-Metallic Single-Mode Optical Fibre Cable

SPM 1178 Single Mode Optical Fibre Termination, Management and Patching Equipment

SPM 1179 Single Mode Optical Fibre Jointing Equipment

SPM 1181 40mm Class 9 High Density Polyethylene Cable Conduit

STM 0073 Communications Data Collection Requirements

TMM C001 Telecommunications Design Process for Design Projects Delegations & Descriptions

TMM P001 Copper Cable Termination

TMM P021 Optic Fibre Cable Jointing, Termination & Management

3.4 RailCorp drawings

MET-CA0242 Bollard Installation

MET-OT0042 Mounting of Pit ID Tags for Half & Full Size Pits Arrangement

MET-OT0043 Pit ID Tag Arrangement

MET-OT0048 Coordination of Signals and Communications Pits and Pipes Part 1




SK0128 Typical Fibre Jointing Arrangement Layout

XXX-CA0294 Conduits Buried in Platform or Sealed Vehicular Area

XXX-CA0311 40mm HDPE Conduit Joint

XXX-SK0105 Buried Cable Route

XXX-SK0106 Cable Route Construction by Rock Sawing

XXX-SK0107 Galvanised Steel Trough Route to Pit Transition

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4 Terms and definitions GLT Ground Level Troughing

GST Galvanised Steel Troughing

Hazardous EPR Zone zone where the earth potential rise exceeds 430 V AC under power system fault condition;

High voltage as defined in AS/NZS 3000 and AS/ACIF S009. Note that in this standard the high voltage shall also include the 1500VDC positive and negative feeders that supply the overhead traction power, as these feeders regularly exceed 1500VDC.

Pipe continuous or jointed pipe forming a sealed conduit between two terminations. Pipe, conduit and duct are interchangeable terms in this standard.

RailCorp Cable Identification Number to be issued as per SPM 0073.

Route Asset or containment to support or carry cables.

Trunk route A route that interconnects two or more communications equipment rooms or main communications nodes, or between train stations.

Non-trunk route A feeder route to an equipment site, usually less than 500m, not designed to house trunk cables.

ULX Under Line Crossings

URX Under Road Crossings

5 Cables and cabling works - general Unless dispensation is obtained from the appropriate Engineering Design Approval Authority as specified in TMM C001, cables and all cabling work shall be in accordance with the following documents, in precedence order:

AS/ACIF S009 and AS/ACIF S008

Other AS/ACIF Standards

This document

TMM P001 Copper cable termination,

TMM P021 Optic Fibre Cable Jointing, Termination and Management

SPM 0677 Single Mode Optical Fibre Cable

SPM 1178 Single Mode Optical Fibre Termination, Management and Patching Equipment

SPM 1179 Single Mode Optical Fibre Jointing Equipment,

SPM 1181 40mm Class 9 High Density Polyethylene Cable Conduit,

Annex 1: Typical and Reference Drawings

SPG 0705 Construction of Cable Route and Associated Civil Works

Other RailCorp standards

Standards Australian Handbooks

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5.1 Cables

All cables used and the method of construction shall be in accordance with specifications quoted in this standard.

5.2 Composite cables

Communications Trunk Optic Fibre Cables shall not incorporate multi-mode fibres.

Where different grades of single-mode fibre are incorporated into a cable, each tube shall contain one grade only. Where non-zero dispersion shifted fibres (ITU G.655) are incorporated, they shall occupy the first tube(s) of that cable.

Note that ESM 105 prohibits the use of communications trunk optic fibre cables for interconnecting local signalling equipment between adjacent signalling bungalows, relay rooms and location cases.

5.3 Optic fibre cable

5.3.1 SMOF fibre specification

Optic fibre cable used externally within the rail corridor shall comply with the requirements of SPM 0677.

The sizes of optical fibre cables shall be 12, 24, 48, 72, 96, 144, cores or higher. Optical fibre cable construction types shall be used in the environment it was designed for.

5.3.2 Optical fibre cable construction

There are three types optical fibre cable construction described by specification SPM 0677 for use externally in the rail corridor. Each type is designed for a particular purpose as detailed below:

• General Installation - Cable suitable for general installation in the rail environment by way of hauling into underground ducts, hauling into above Ground Steel Troughing (GST) and laying in Ground Level concrete Troughing (GLT). Can be used in all locations except for underground tunnels or stations or other underground facilities.

• Fire Safe - Cable for installation in underground stations or other underground facilities and tunnels. Can be used in all locations however not practical to use in long section of small diameter HDPE pipe.

• Blown Cable - Cable for installation by way of air/gas blowing through small diameter HDPE continuous conduits. This cable may only be used where the route is predominantly small diameter HDPE continuous pipe and installation is by way of blowing.

5.3.3 Optical fibre cables sizes

All the cables mentioned in this section are optical fibre cables.

At the completion of a cable installation project, all cables shall have a minimum 75% of fibres that are unused (dark fibres) and available for service restoration and future expansion. The size of any trunk (or long haul) cable shall not be less than 96 cores.

With regard to trunk cable, if there is no existing cable or no ring cable to provide diversity, two new trunk cables in different routes shall be installed at the time of construction. Diversity provided by a fibre swap arrangement with other organisations or

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carriers is deemed to meet this requirement so a second new cable is not required. See Section 6.8 for diverse cable routes.

Route Type Minimum Cores of Fibers

Trunk cable >3km 96F (may require G.655 fibres)*

Customer cable,1km 24F DTRS cables 12F

* Note 1: to be determined by as per TMM C001.

Both station cable and customer cable are access cables.

5.4 Copper communications cable

Copper, twisted pair communications cable used externally in the rail environment falls into two categories:

a) Cable for general outdoor use

b) Fire safe cable used within tunnels and underground stations

This standard does not cover:

• Fire rated cable used for emergency systems in tunnels • Internal fire safe cable used in underground stations • Internal cable used in aboveground stations and buildings

5.4.1 Copper cable (outdoor)

External copper communications cable shall be protected against mechanical damage, vandalism and/or theft by being installed within properly constructed cable routes and shall comply with the following requirements:

• The cable shall have 10, 20, 30, 50, or 100 pairs as required. • The cable shall have:

– ▪ Conductors of solid annealed copper – ▪ Conductor diameter of 0.64mm or 0.9mm – ▪ Insulated with cellular polyethylene – ▪ Colour coded – ▪ Unitized twin configuration – ▪ Jelly filled – ▪ Black polyethylene moisture barrier sheathed – ▪ Hard nylon jacket – ▪ Metre marked

The cable shall conform to the requirements of AS/CA S008.

5.4.2 Fire safe copper cable (for tunnels)

Copper communications cable that is to be installed within underground tunnels shall be protected against mechanical damage, vandalism and/or theft by being installed within properly constructed cable routes and shall comply with the following requirements:

• The cable shall have 10, 20, 30, 50, or 100 pairs as required. • The cable shall have:

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– ▪Conductors of solid annealed copper – ▪Conductor diameter of 0.64mm or 0.9mm – ▪Insulated with solid polyethylene – ▪Colour coded – ▪Unitized twin configuration – ▪Black polyethylene moisture barrier sheathed – ▪Over sheathed with a low smoke, halogen free, flame retardant jacket

The cable shall conform to the requirements of AS/CA S008 and the relevant fire safe specifications, including AS/NZS 1660.5.2, AS/NZS 1660.5.3, and AS/NZS 1660.5.4.

5.4.3 Cable identification codes

RailCorp cable identification codes shall be provided on each cable within each pit, at cable joints and at each cable terminations. These codes shall display clearly the cable identification number, type, size, conductor diameter and destination of the cable as per SPM 0073, TMM P001, and TMM P021.

6 Cable route – general

6.1 Compliance to SPG 0705

Cable route construction shall be in accordance with SPG 0705, with the additional requirements as per this standard.

6.2 Cable route life span

Cable route (includes conduits, joints and pits, GST etc) shall be designed and constructed for a minimum life expectancy of forty years.

6.3 Cable route construction types

Except where installation conditions would make it impractical, pit and pipe construction shall be used for all new cable routes,

Except for cable ladder, rack or cable tray which is acceptable in tunnels etc, cable route construction type shall be in the preference in order of:

a) Pit and conduit,

b) GST,

c) Aerial cables.

No new direct buried cable is allowed, except for the last 5m accessing existing direct buried cable network.

6.4 GLT

GLT shall only be used as a last resort.

Where used GLT sections:

a) Shall not exceed 5m, unless with the written acceptance of the as per TMM C001.

b) Shall not be used in vehicle accessible areas

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6.5 Tracing of cable route location

For new communication cable routes, facilities to trace and locate the cable route shall be provided including but not limited to the following:

• SPG 0705 metallic trace wire except in Hazardous EPR zone. • RF Identification System, with GPS locations of the cable routes

6.6 Aerial cable

The material used for aerial cable installation shall comply with RailCorp specification where applicable.

• SPM 0885 • The aerial cable shall be at least 5m clearance from ground level. • The aerial cable shall be at least 4.5m clearance from GST. • The aerial cable shall be installed in accordance with the specifications required by

RailCorp Chief Electrical Engineer.

6.7 Separation from other services

Where communications cables are installed in a combined service route, they shall be separated from signalling and power conduits/cables in accordance with AS/ACIF S009. See also SPG 0705.

Where communications cables are in the same trench as signalling and power cables, it is mandatory that Communications cables shall be housed in conduits.

Unless special dispensation is provided by TMM C001, signalling and electrical conduit shall not pass through or enter pits dedicated for communications cabling, nor shall communications conduits pass through or enter pits dedicated for electrical or signalling cables except for the exemption provided below.

In locations where there are no dedicated communications cable pits or where it would be uneconomical to provide such a pit for a single service, and it is required that a service be run to a signalling location, then a communications cables designated for signalling services may pass through a signalling pit but shall do so with in a subduct so as to comply with AS/ACIF S009.

Examples of such a service are signalling post phones and data links to signal locations.

Refer to drawings: MET-OT0048, MET-OT0049, MET-OT0050 and MET-OT0051.

6.7.1 Separation from HV - additional requirements

Communications pits and communications cable routes shall be separated from HV electrical pits and cable routes such that the inside wall of a HV electrical pit and or conduit shall be not less that 450mm separated form the inside wall of a communications pit and that communications conduits shall not pass closer that 450mm from the inside wall of a HV electrical pit. This is to ensure that compliance with AS/ACIF S009 will not depend on the location of a cable with in a pit.

For the purposes of separation, both negatives and positives of the1500 volt DC traction feeders shall be considered as HV cables.

Refer to drawings: MET-OT0048, MET-OT0049, MET-OT0050 and MET-OT0051.

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6.8 Diverse cable routes

New trunk cable routes and nominated locations shall have a primary and an associated diverse path (or paths) for the protection of important communications services such as DTRS, Elec. SCADA, ATP, CCTV and similar systems. This diverse path is generally only required for optical fibre and shall be provided by one or more of the following means.

6.8.1 Diversity via different rail line (ring diversity)

An example would be providing diversity for a cable route between North Sydney and Gordon via Hornsby, Strathfield and Central.

This is the preferred diversity option.

6.8.2 Diversity via path off the rail corridor

This would normally be achieved by a fibre swap with another communications organisation. Another option is to lease capacity from other carrier(s).

6.8.3 Diversity provided by parallel pit and pipe, GST troughing etc

Diversity may be provided by parallel cable routes of GST / Troughing / Pit and Pipe with an acceptable separation between the different routes. Such separation shall be approved by the design approval authority. As a guide, the normal requirement would be:

Less than 5m of separation between routes is allowed for

• Up to 1% of the route length; or • 20 meter of route length

whichever is greater.

Cables attached to two adjacent tunnels of the same route, are deemed to comply as diverse cable routes. Cables attached to opposite sides of a single tunnel are not considered as diverse cable routes.

6.8.4 Aerial routes as diverse cable routes

Aerial route provides an alternative route to buried, existing GLT and GST routes. Where the risk (such as bush fire) is low, aerial route may be considered as a diverse cable route.

6.8.5 HV Power Cables route as diverse cable route

Where no other diversity option as specified in Section 6.8.1 to Section 6.8.4 is feasible and subject to the approval of Chief Electrical Engineer, where the communications cable route runs parallel to the HV cables route, the HV route shall have an extra conduit for communications cables, which shall be reserved for optical fibre cables to be installed as diverse communications cables. Cable joints shall be installed in communications pits (preferably dedicated to the diverse path) linked to the HV pit via conduit.

6.8.6 Signal cable route as diverse cable route

Where no other diversity option as specified in Section 6.8.1 to Section 6.8.5 is feasible and subject to the approval of Chief Signal Engineer, diversity may be achieved by installing communications optic fibre cable in the signal cable route. A dedicated conduit

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is not necessarily required. Cable joints shall be installed in communications pits (preferably dedicated to the diverse path) linked to the signal pit via conduit.

6.9 Hazardous locations

6.9.1 Catch points

The cable routes, pits, cabinets and buildings shall not be positioned where they may be damaged by a train derailed by catch points.

6.9.2 High voltage locations

Where copper communications cables pass through the Hazardous EPR Zone of a high voltage location such as traction substations, pad-mount transformers, pole mounted transformers and the like, they shall do so in accordance with the requirements of AS/ACIF S009. In addition copper communications cables coming within 15 metres of a High Voltage Location earth grid shall do so in a in a continuously sealed, non-metallic conduit regardless of the level of EPR.

High voltage locations located outside the rail corridor, owned and operated by others such as Energy Australia, must also be taken into consideration.

Joints in copper communications cables shall not be permitted within a Hazardous EPR Zone.

6.9.3 Construction rules for Hazardous EPR Zones

Within Hazardous EPR Zones, the construction of cable routes, pits, communications rooms and equipment shall comply with the rules below.

• Only plastic-sheathed cables shall be used. • Copper communications cables that pass through a Hazardous EPR Zone shall do

so in rigid plastic conduit - in pit and conduit construction route using white class 12 UPVC conduits or class 9 HDPE conduits.

• Any joints in copper cables shall be housed in a suitable pit well outside the EPR hazard zone and labelled with an EPR hazard warning that such copper cables pass through a Hazardous EPR Zone.

• Any existing pit within the proposed Hazardous EPR Zone shall be relocated. Subject to RailCorp’s approval, if such pit cannot be re-located, it must be labelled with an EPR hazard warning on all walls and lids.

• No communications earthing or arresting shall be done within the Hazardous EPR Zone.

• No metallic trace wire shall be installed into any Hazardous EPR Zone. • See AS/ACIF S009:2006 clauses 18, 20.5 and Section H.

7 Cable route capacity At the completion of a given project there shall be reserved for communications purposes, a minimum unused capacity of 50% of the total capacity for each and every section of new cable route such that a second set of identical cables could be installed within each such section of route without the need for additional route construction works.

Where a trunk cable route consists of pipes, the unused capacity shall not be less than one additional unused pipe, or 50% of the total capacity, which ever is greater. For trunk route under line crossings this shall be increased to two unused pipes or 60% of the total capacity whichever is greater.

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7.1 Pit and pipe capacity

For trunk routes, the minimum installed capacity shall be 2 x 100mm conduits.

7.2 GST capacity

For trunk routes using GST, the GST installed capacity shall be a minimum of 250% of the initial required capacity for the whole project.

Either a complete trough with individual lid or white pipe in a shared trough shall be dedicated for the sole use of RailCorp’s’ communications.

A communications GST trough shall be at least 150mm x 150mm.

A GST communications route shall be capable of being duplicated by fitting additional GST trough to the existing supports.

8 Pit and pipe cable route construction The separation of signals from communications route shall comply with Section 6.7 .

• White conduit to be used for communications. All white conduits shall be in accordance with Section 8.1

• In some cases, arrangement will allow shallow burial conduits with a reinforced concrete cover (see drawing XXX-CA0294), refer to AS/ACIF S009 for minimum depth under road ways.

• Excavation works shall be in accordance with ESC 540 and AS 3500.2.

8.1 Conduits This section specifics the type of conduits to be used for cable route construction.

• Except where installation conditions would make it impractical, pit and conduit construction shall be used for all new cable routes.

• Where possible, 100mm conduit shall be used for all new projects

For all pit and conduit cable route, the following conduits are approved for use.

1 40mm HDPE conduit

40mm OD HDPE Class 9 conduits as per RailCorp Specification no. 1181

2 100mm HDPE conduit

100mm OD HDPE Class 9 conduits with a normal wall thickness not less than 9.5mm

3 50mm Conduit 50mm UPVC Class 12 pressure Conduit with a normal wall thickness not less than 3.0mm



Table 1

Conduits joints and installation shall be in accordance with the manufacturer’s instructions.

PVC conduits shall be jointed by solvent welding, with the ends forced well into the socket.

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HDPE conduits shall be jointed by either a pressure fitting such as shown in drawing XXX-CA0311 (see Section 3.4 or Section 8.1.2) or by thermal welding using purpose designed thermal welding couplers. Conduit ends shall be cut cleanly and at right angles with all burrs removed and forced well into the coupler socket before the heating or clamping process. The finished joint shall be gas tight.

Where size of conduit is not specified, it is deemed to be 100mm UPVC class 12 pressure conduit.

8.1.1 Open-cut trenching and conduit installation Voids being left between the conduit(s) and surrounding soil can lead to the deformation or even the total collapse of a conduit.

Figure 1 - A poorly installed cable route with voids between conduits and surrounding soil leading to the deformation or collapse of the conduit.

Conduits shall be placed in the trench and the fill placed around the conduits so that as far as possible the fill and surrounding soil and or rock shall exert an even pressure on the entire surface of the conduit. To this end installers shall insure that there are no voids between the conduit(s) and/or surrounding soil and/or rock. This is best achieved by laying conduits a layer at a time with spacers every 3 metres along the cable route and between the conduits to ensure that the voids can be filled with sand or other suitable material to completely fill any voids.


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Figure 2 - A cross-section and prospective of a correctly installed cable route with pine battens to ensure that there no voids between conduits and surrounding fill.

Crashed rock, finely divided road base, or sand shall bed and cover the conduits and fill the spaces between conduits. The conduits shall be covered to a thickness of not less than 100mm over the uppermost conduit. The remainder of the trench shall be filled with clean fill, free of broken concrete, rubble, wood, glass, rubbish, steel or other metallic objects and free of stones which would not pass through a 50mm sieve.

If a signal tracer wire is required, it shall be a white polyethylene insulated stainless steel wire, installed in the trench over the conduits at a nominal depth of 500mm below finished surface level.

Cable marker tape as per specification SPG 0705 shall be installed over the cable route at a depth of 300mm. See drawings 112000/5/4, 112000/5/5 and 112000/5/6.

Trenches are to be excavated so that conduits can be laid with 300 mm clearance all round from other obstructions, unless otherwise approved by RailCorp.

The trench shall be compacted in accordance with SPG 0705. This compaction of the soil in the trench shall not cause the conduits to be deformed.

8.1.2 Reference design drawings of typical installations Listed below are drawings showing typical and the preferred design arrangements for cable route construction. These arrangements shall be complied with as far as practicable.

• CA0242 - Bollard Installation • CA0294 - Conduits Buried in Platform or Sealed Vehicular Area • CA0311 - 40mm HDPE Conduit Joint • SK0106 - Cable Route Construction by Rock Sawing • SK0107 - Galvanised Steel Trough Route to Pit Transition • SK0128 - Typical Fibre Jointing Arrangement Layout


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8.2 Pre-cast concrete pits

8.2.1 Compliance to SPM 0123 All reinforced pre-cast concrete cable pits shall be rectangular and conform to specification SPM 0123.

8.2.2 Pre-cast concrete pit location All pits and pipes shall be installed in accordance with SPG 0705. However, if a waiver is given to install pits closer to the track than specified in SPG 0705, then the pre-cast concrete cable pits manufactured in accordance with specification SPM 0123 shall not be installed closer than one (1) metre from the edge of a sleeper.

Pre-cast concrete cable pits manufactured in accordance with specification SPM 0123 shall not be installed closer than two (2) metres from any power pole or overhead wiring structure, or the foot and/or the edge of a retaining wall.

Pits that are required to be closer to the track or structures than these limitations shall be purpose designed and shall require the approval of Chief Engineer Civil or his appointed representative.

8.2.3 Identification of pits and pit ID numbers Each pit installed in the RailCorp Communications network shall be labelled on site, and documented in accordance with SPM 0073, the information provided to the Telecommunications Network Configuration group (TNC group) of Communications & Control Systems Division.

As shown in drawing MET-OT 0042, two identical identification labels shall be mounted on each pit; one on the pit lid and the other mounted on the inside wall of cable pits approximately 50mm from top in an easily accessible location. Pit identification labels shall be controlled by the TNC group

8.2.4 Where pits are required Pits shall be installed at turning points, or where curves or bends occur. All pits shall be installed outside any Hazardous EPR zone for the main cable route.

Pits shall be placed immediately at either side of the following

• Underline crossing • Under road crossing • Where a building, maintenance facility, paved area or station exists • Where access to constructing a new cable route in future becomes high risk due to

limited access

8.2.5 Distance between pits Distance between pits shall be 125m (maximum) unless:

a) The purpose of the route is for the installation of non metallic fibre cable only, in the present and in the future; and

b) The route is, at all points, less than 2m deep

in which case the pits shall be no more than 250m apart, or less than 500m if the route between the pits is straight.

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8.2.6 Protection of pits and pit lids

With the exception of trafficable pit lids, all pits and pit-lids shall be located such that they cannot be damaged by vehicles or they shall be protected with suitable barriers, such as bollards. Such barriers shall be approved by the design authority and shall not block the passage way for vehicles or force vehicles into the danger zone.

8.3 Mandrelling

All conduits installed shall pass the mandrelling test by pulling a mandrel of a diameter 90% of the internal pipe diameter, upon backfilling and compaction. The mandrelling test shall be witnessed by an authorised RailCorp staff or representative.

The cable route, either pipe or GST, shall remain usable at all times, the cross sectional area of the GST, pipe etc shall not be diminished by pressure or aging during the maintainable period of the cable route, which shall include all GST, bores, pits and pipes and others. Conduits shall not be deformed to less than 90% of the internal diameter of the pipe. Similarly, for GST, less than 10% of the internal area is lost due to changes in GST shapes.

9 Operation and maintenance of duct space

9.1 Draw rope, cleaning and sealing of conduits

All conduits shall contain draw wire or draw rope (minimum 10mm diameter nylon rope) whether conduits are empty or cables are installed. Such draw rope shall facilitate the hauling in of cable pulling device, which will be used to haul in copper or optical cables.

All spare pipes shall be cleaned by the mandrelling test (refer to “Mandrelling”, see Section 8.3), each pipe shall have draw rope suitably anchored at each end of the pipe and then sealed with proprietary end caps to stop the ingress of foreign particles.

9.2 Recovery of de-commissioned cables Any cable that occupies space in a re-enterable cable route that has been decommissioned shall be completely removed from the re-enterable cable route within three months from date of decommissioning unless permission for an extension of time has been granted from the General Manager, C & CS Division or his authorised representative. All cable, conduit, MDF records and associated services records shall be updated within one month from actual date of removal. A comment field shall be recorded in the history of records or drawings.

10 Historical names References to previous organisational names (viz “Rail Access Corporation”, “Rail Infrastructure Corporation”, “Argus Communications” etc or their abbreviations) in requirements for marking of cables, conduits etc specified in Annexes shall be replaced by “RailCorp”.

11 Documentation All cabling and cable route construction works shall be recorded in accordance with SPM 0073.

© RailCorp Issued July 2011 UNCONTROLLED WHEN PRINTED

Documents

Withdrawal of ESM 102 Communication Outdoor Cabling · Subject: Withdrawal of ESM 102 Communication Outdoor Cabling This technical note is issued by the Asset Standards Authority