DSR 01 014 Excavating Near Electricity Cableslibrary.ukpowernetworks.co.uk/library/asset/f97a1a8b-08a... · Web viewChanges to last paragraph in Section 8.5 regarding the use of the

UK Power Networks DSR 01 014v7.0

Excavating Near Electricity CablesOwner

Name Peter VujanicTitle Head of Health and Safety

Signature

Date 09 July 2018

Authoriser

Name Dudley SparksTitle Operational Safety Manager

Signature

Date 09 July 2018

This document forms part of the UK Power Networks Integrated Management System and compliance with its requirements is mandatory. Departure from these requirements may only be taken with the written approval of the above authoriser.

Revision RecordVersion number 7.0 What has changed?

Clarity on Electrical Competency (i.e. eligible to hold a copy of the DSRs as per DSR 01 001). DSR 01 014a (now v5.0) reviewed with no changes

Why has it changed?Request from the business

Date published 10/07/2018

Next review date 10/07/2021

Prepared by N Saunders

Version number 6.0 What has changed?Distribution Safety Rules section numbers included in the references (sect 4.0). Form DSR 01 014a reviewed with no changes.

Why has it changed?Clarity



Prepared by D Milton

Version number 5.0 What has changed?Changes to last paragraph in Section 8.5 regarding the use of the Sniffer and Safe Working Distances. DSR 01 014a Digging card v2.0 was reviewed (now v3.0): Changes under title ‘Have you got all the information you need’, ‘On-site risk assessment’ changed to ‘Point of Work assessment’, 1/500 plan changed to ‘cable records’; ‘Use a Pick…’ changed to ‘Use a Mattock…’Why has it changed?Clarity of wording



Prepared by D. Daintree

This printed document is valid at 18/05/23, check after this date for validity.Page 1 of 15


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Contents

1.0 Introduction and Purpose...............................................................................................32.0 Scope................................................................................................................................33.0 Objective...........................................................................................................................34.0 References.......................................................................................................................35.0 Definitions........................................................................................................................46.0 Responsibilities...............................................................................................................47.0 Records............................................................................................................................58.0 Process Detail..................................................................................................................5Appendix 1 Locating cables, marking the area of excavation and safe digging..............13



1.0 Introduction and PurposeThis procedure is based on the Health and Safety Executive booklet HSG 47 “Avoiding danger from underground services”. It describes how UK Power Networks staff and their contractors should carry out excavations in the vicinity of underground utilities.

2.0 ScopeThis procedure will apply to all UK Power Networks staff and their contractors carrying out excavations in the vicinity of electricity cables. The safe digging methods described are also relevant to excavation near other buried services.

This procedure includes safe excavation in the vicinity of cables which are or may be defective due to fault or damage.

The procedure does not describe how to comply with the New Roads and Street Works Act 1991 which is covered in “Understanding Street Works”.

All works to be as detailed in HSG 47, Excavation and cable installation manual and digging card unless specified within this document.

3.0 ObjectiveTo reduce the risk of injury to any person and damage to any buried services during excavation work and to provide guidance for safe excavation in the vicinity of cables that may be defective.

4.0 ReferencesHealth and Safety Executive HSG 47 “Avoiding danger from underground services”New Roads and Street Works Act 1991 (NRSWA)UK Power Networks Distribution Safety Rules

(Sections 3.9, 5.9, 8.2 and 8.3)

UK Power Networks Understanding Street WorksUK Power Networks Excavation and cable installation manualHSS 01 105 Putting People to WorkDSR 01 007 Identification of HV CablesHSS 40 029 Unidentified CablesDSR 01 018 Identification of LV CablesECS 02-0019 Installation of Underground cables LV to 132kVEDS 08-0113 Guidance for the Application of ENA Engineering

Recommendation G88 and G81 – Inset Networks (IDNO’s and other Licensed DNO’s)

GTRA GRL 12 Excavation and ReinstatementHSS 01 050 Behavioural Exchanges and InspectionsHSS 40 045 Basic Requirements for Live Working on Low

Voltage ApparatusHSS 01 093 Environmental Management of Street Works



HSS 01 069 Personal Protective Equipment (PPE)

5.0 DefinitionsBuried Service All underground electricity, gas, water, sewage, fuel pipe lines and

telecommunications equipment.Defective Cable A cable where there is evidence of external damage or a known or

identified fault condition such as an open circuit or phase to phase fault.

Encroachment Lines

Parallel lines marking out a distance at minimum of 300mm from the outermost cable located in the excavation area.

Isolated Disconnected from associated Plant, Apparatus and Conductors by an Isolating Device in the isolating position, or by adequate physical separation, or sufficient gap.

Safe Working Distance

The minimum clearance between an operator and a defective cable to provide adequate safety.

Service Connection A cable or pipe linking a distribution main with individual SFRP So Far as Reasonably PracticableSite Co-ordinator Suitably qualified person who will remain on site and have

responsibility for the work being carried out.Personal supervision

Supervision of a person such that they are continuously observing and in the presence of that person as detailed in section 2 of the DSRs

Limitation of access

A safety document that defines the limits and nature of the works which may be carried out as detailed in section 2 of the DSRs

6.0 ResponsibilitiesUK Power Networks Senior Managers will ensure that

staff are appropriately trained to enable them to avoid danger when carrying out excavation work and, when appropriate, are working on or near defective cables

contractors have systems in place to ensure that they meet the same standards as expected for direct staff

robust auditing is carried out where staff and contractors are carrying out excavations

a copy of HSE Guidance Note HSG 47 is held at each management location.

Those responsible for supervising the work

will be responsible for the organisation of the work prior to the commencement on site, and during the work, but are not required to be in attendance on site during the work

shall hold as a minimum a NRSWA supervisors qualification for all work on the public highway. A NRASWA qualified Site Co-ordinator may undertake this responsibility. For work away from the public highway, such as within substations or on private land, a NRASWA qualification is not required providing an equivalent CDM arrangement is in place.



Site Co-ordinators will take charge of the co-ordination of the work on site and ensure that all reasonable

precautions are taken to avoid danger

ensure that where work is ongoing a new site co-ordinator is appointed and briefed before leaving site

Hold a NRSWA qualification appropriate to the work. In exceptional circumstances this qualification may be held by another member of the working party.

Members of the working party will

carry out all reasonable instructions of the Site Co-ordinator

report any relevant site changes to the Site Co-ordinator

as a minimum wear the PPE specified in procedures.

7.0 Records Records of the UK Power Networks apparatus and plant should be kept updated and

made available to anyone intending to carry out excavations

A record of NRSWA qualifications will be maintained by the Training Centre

Records of site audits will be kept as required by the Behavioural Exchanges and Inspections procedure (HSS 01 050)

8.0 Process DetailAll cables and connected apparatus must be treated as live until proven dead.

Site staff, including the site co-ordinator, always have the right to make a cable or cables dead, or request that they should be made dead, for safety reasons. Nothing in this procedure should encourage any person to work near a live cable when there is any doubt about their safety.

Unless a defective cable is involved work may normally be carried out safely on or near live LV Cables. This work should comply with appropriate procedures including Generic Task Based Risk Assessments.

The Site Co-ordinator, as person in charge on site, is responsible for taking all reasonable precautions to avoid danger. This includes ensuring that an On Site (Point of Work) Assessment is carried out and if necessary updated during the work.

Cables must be made dead if there are particular safety reasons or other special circumstances including the outcome of the On Site (Point of Work) Assessment.

If site conditions are found to be inconsistent with the job instruction, or the safety of any person may be put at risk through carrying out an instruction, then work shall be stopped immediately and the problem reported to a supervisor.

Before work recommences a course of action must be agreed which safely overcomes the problem. Every such agreed course of action must be written down. Where the course of action is agreed over the telephone it must be written down by both parties and the person receiving the instruction must read it back in full to the sender to make sure that it has been accurately received.



Excavation and work in the vicinity of defective cables requires particular care and the additional requirements for this work are specified in Section 8.5.

When it is felt that the procedures shown in Appendix 1 cannot be followed advice should be sought from a suitably competent person. Any alteration must be recorded in writing or the work must be carried out under the personal supervision of the competent person.

8.1 Work Instructions

For any job, planned or un-planned, the instructions and information provided shall comply with the requirements of HSS 01 105 Putting People to Work, or other relevant procedure.

The work instructions should cover any site specific issues including the possible presence of:- Other cables especially EHV routes Third party cables such as inset or private networks Auxiliary plant such as pilot cables, gas or oil pipes Additional hazards when excavating within or near substations - Refer to Section 8.6 High pressure national fuel pipelines

The Person issuing the job instruction must decide whether the excavation is to be carried out with the cable(s) live or dead although this does not prevent cables being made dead as work proceeds.

For planned work the instructions shall be issued to the Site Co-ordinator and shall include:

Clear written instruction of the work to be done and associated plans Any precautions to be taken or special instructions to be observed. For example it may be

decided to specify that additional cables should be exposed to assist with identification. For LV cables the approved method of positive cable identification to be used as detailed in

DSR 01 018.

For unforeseen work that occurs at such short notice that it cannot be planned in advance.

The job shall not commence unless network cable records (paper or electronic) are on site. These should be sufficient to enable isolation of any damaged or faulty equipment.

Where practicable other utility plans should be made available on site. There shall be a full On Site (Point of Work) assessment of the site.

The excavation should be carried out as though there are buried services in the vicinity.

8.2 Location of cables and marking of surface (Refer to Appendix 1 for illustrations)

Cable Avoidance Tools provide information on the position of cables. They must be used in conjunction with cable and other utility records (where provided). The depth and location of cables shown on mains records may have changed because of subsequent site alterations.



An approved Cable Avoidance Tool shall be used before any surface is removed or any digging is started. Reasonable steps shall be taken to establish the runs of cables both along and across the length of the intended area of digging.

The user should be competent to use the available cable avoidance tool which shall be within its inspection date and shall be regularly checked for correct operation.

All markings shall be with a waterproof marker The area of excavation should be marked using information from task instructions, plans

and cable location The line of all known cables in the vicinity of the excavation should be marked. These lines

should be extended at least 300 mm past any excavation. Encroachment Lines should be drawn at least 300 mm away from and parallel to the outer and innermost cable marker lines. These lines should also be extended at least 300 mm beyond the edge of the actual excavation.

8.3 Excavation of all cables

All tools must be of an approved type. Hand tools must be used in preference to power tools in the vicinity of cables unless site

conditions make this impractical, for example the removal of hard surfaces outside of encroachment lines.

Hand operated manual tools should be used to progressively and carefully undermine any hard surface from outside the encroachment lines towards the cable(s).

Hand held power tools may only be used to break up any undermined hard surface, keeping pace with, but not going past the undermining.

Once all recorded and detected services inside the proposed digging area have been exposed hand held power tools may be used below ground level to break up concrete or similar structures only where it is not possible to use hand tools.

Extreme care must be exercised when using power tools above already exposed cables. A cable avoidance tool should be used during excavation to check the location of known and

other cables. Where cables or ducted cables are not exposed by undermining in their indicated position,

and/or are suspected or known to be embedded in or directly below any concrete, then that concrete shall not be disturbed until the cables have been made dead, unless a Senior Authorised Person can establish an alternative safe system of work.

Where it is established or suspected that cables have been encased in concrete then a safe system of work will be agreed between the Senior Authorised Person and the excavation team Supervisor. (see UKPN Preferred method of work where cables are encased in concrete)

Where exposed cables are damaged during the excavation or are found with previous damage then reference should be made to Section 8.4.

Use of power tools must stop if at any time the cutting rate quickens, indicating softer ground. At all times, attention must be paid to the cable run marker lines outside the edges of the hole.

Spades should be used in preference to forks. Extreme care should be taken when using excavation tools

Digging tools must be used in a controlled manner and should never be thrown into the ground.

Approved flame retardant coveralls, leather gloves and approved industrial footwear shall be worn as a minimum at all times during excavation work. Where power tools are being used or when the On Site (Point of Work) Assessment deems it necessary additional PPE such as eye or face, hearing and head protection should be worn.

A serviceable portable dry powder fire extinguisher of at least 2kg capacity must be available on site for all work near cables connected to the Distribution System.



Suitable precautions shall be taken to cover the following risks:

Collapse of the sides of the excavation – this risk should be reviewed throughout the work Materials falling onto people working in the excavation People and vehicles falling into the excavation Digging immediately adjacent to or undermining nearby structures including street furniture Digging in the vicinity of trees Working on contaminated land Discharging surplus water from the excavation Exposed cables which should be adequately protected and supported Ensuring that where an excavation is left unattended exposed cables are marked with

Danger Live notices or that defective live low voltage cables are covered by a cable damage blanket

Ensuring that any unattended temporary jointing has adequate mechanical protection

8.3.1 Cables Encased in concreteWhere cables are encased in concrete it is essential that the works are thoroughly planned to reduce the risk SFRP.

Cables encased in concrete shall be made dead prior to any disturbance of the concrete. If they cannot be made dead, then the justification must be documented and the procedure below followed:

It is anticipated that this type of work would be subject to the Personal Supervision of a Senior Authorised Person who will take into account the following

Consideration should be given in the first instance to excavating in an alternative location, if not possible then to overlaying the section by locating the cable at 2 suitable alternative positions

Consideration should be given to lowering of the protection settings. Consideration should be given to lowering of the fault level to the lowest practical level by

switching. Dependent of the conditions on site, all cables that could be impacted by the intended work

should be identified and made dead or given adequate support and mechanical protection, such as sand bags and timber.

Work with any adjacent cable or circuits energised should be subject to a site specific risk assessment developed in conjunction with a Senior Authorised Person and agreed by all in the working party.

8.3.2 Ducts Encased in concreteWhere cables are within multiple ducts in concrete it is essential that the works are thoroughly planned to reduce the risk SFRP.

It is anticipated that this type of work would be subject to the Personal Supervision of a Senior Authorised Person.

Consideration must be given in the first instance to overlaying the section by locating the cable at exit / entry points to duct systems.

Dependent of the conditions on site, all cables that could be impacted by the intended work should be identified and made dead or given adequate support and mechanical protection, such as sand bags and timber



It may in some circumstances be possible to safely break into a duct system containing cables using approved tools and methods (persons should wear full PPE with full face protection and leather gloves when engaged in this activity).

Work with any adjacent cable or circuits energised should be subject to a site specific risk assessment and work method statement developed in conjunction with a Senior Authorised Person, and agreed by all in the working party

8.4 Additional precautions to be taken when working near defective cablesSite staff including the site co-ordinator may always make a cable or cables dead, or request that they should be made dead. Nothing in this procedure should encourage any person to work near a live cable when there is any doubt about their safety.

Any damaged cable or other equipment, irrespective of voltage and condition, shall be assumed to be live until it has been isolated and proved to be dead.

LV Control or Dispatch shall be advised immediately of all defects to commissioned LV cables unless these are known to have been previously reported.

The HV Control Engineer shall be advised immediately of all defects to commissioned HV cables unless these are known to have been previously reported.

The Site Co-ordinator shall consider a variety of factors, including those listed below, when deciding whether to make cable(s) dead. These factors affect the likelihood and consequences of any unplanned discharge from the cable.

Whether the cable is single or multi-phase The size of the cable The voltage of the cable The feeding arrangements of the cable The depth of the cable The extent and visibility of any defect The accuracy of any fault location The possibility of additional damage to any cables.

8.5 Safe Working Distance when working near defective cablesEven on an apparently healthy network there is a small risk of excavating on to a fault. These additional precautions apply due to the increased risk involved when excavating specifically to locate a fault.

The Safe Working Distance from a live defective or a possibly defective cable will vary but decisions should be based on the assumption that the cable will fault and that PPE should not be relied on to provide protection.

Site staff should assess the risk whether to make a cable dead based on site conditions but the following are not allowed in any circumstances:

Work within 5 metres of a known defect on a live high voltage cable Work within 1.5 metre of a known defect on a live exposed multi-phase low voltage cable or

joint Work within 1 metre of a known defect on a live exposed low voltage single phase cable (up

to and including 35 sq mm or 0.0225 sq in).

Where safe and appropriate an exposed low voltage cable may be covered by a cable damage blanket.



In general the minimum Safe Working Distance shall be 1.5 metres but the following are examples where a different distance may apply.

The distance from a live defective high voltage cable should be considerably higher and the cable should normally be de-energised without delay. There may be circumstances where a high voltage cable, with possible damage, remains live and it may be considered acceptable to provide protection from access until arrangements can be made for isolation and any repairs.

Where a high voltage cable has been damaged it is often necessary to approach the cable that should have been isolated to carry out further excavation and to spike to prove dead. The person responsible for this work shall assess whether there is any risk that the wrong cable may have been isolated. If there is any doubt or possibility that other cables may have been damaged then a Safe Working Distance or further isolations may be required.

For a low voltage cable that is known to be at 450mm depth it may be appropriate to remove the top 100mm of surface with the cable live. Cable records should not be relied on as an indication of depth.

Additional care should be taken where more than one fuse feeds each phase of a LV cable. Where there is a known point of defect on a single phase service cable it may be

appropriate to work closer than 1.5 metres, especially if a cable damage blanket can be placed over the defect.

The accuracy of fault locating instruments should be considered when deciding the Safe Working Distance. Fault locators normally have an accuracy of about plus or minus 10%.This means that a reading to a fault of 50 metres may be 5 metres out either way. This does not include any additional inaccuracy due to errors in plans. A 10% error on a distance of 15 metres is 1.5 metres which would eliminate the normal Safe Working Distance. Depending on experience, time since the fault, and the likelihood of ducts it may be possible to rely on a cable sniffer to provide a more accurate location.

If by using evidence from the fault locating instrument, the sniffer, no supplies and any other relevant information the actual fault position can be determined, the cable can be excavated a minimum distance of 1.5m from the fault. In some circumstances negative results from the sniffer can also be used to determine a suitable location to dig. Where this is not possible the cables shall be isolated before or at an early stage of the excavation.’

8.6 Additional precautions for work in locations controlled by UK Power Networks

These will apply for all excavation work including installing earth pins, rods, fence posts or any activity causing disturbance to the ground.

A technically competent person shall issue those persons undertaking the work with a method statement that is specific to the work. This shall include requirements for competency, resources, plans, cable locators and any other relevant precautions such as consideration of nearby overhead lines.

8.6.1 Where work is to be undertaken by a person who holds an Electrical Competency (i.e. eligible to hold a copy of the DSRs as per DSR 01 001) under the Distribution Safety Rules:-

For work in grid, primary or strategic sites a Limitation of Access shall be issued and the appropriate Control Engineer informed.

For work in or in the vicinity of secondary substations



If following the pre-work site survey the technically competent person putting the person to work considers it necessary a Limitation of Access shall be issued and the appropriate Control Engineer informed.

8.6.2 Where work is to be undertaken by a person who does not hold an Electrical Competency under the Distribution Safety Rules:-

A Limitation of Access shall be issued to a Competent Person who will provide Immediate Supervision during the works. The appropriate Control Engineer shall be informed.

8.7 Personal Protective Equipment - Working near defective cablesAlthough eye protection should be worn for all excavation work involving defective cables it is not normally practical for excavators to wear full face protection. Therefore where there is a risk of injury from a discharge while working near a live cable this cable or cables should be isolated.

There is always a slight risk of a second defect or an unexpected discharge. Where jointing staff are working on or near a cable that may have a defect, consideration should be given to wearing approved full face protection, in addition to Safe 6 PPE, especially until the cable is proved dead.

8.8 Isolation and Proving DeadWhere a cable or cables are to be made dead then they shall be isolated and proved dead at the point of work in accordance with the Distribution Safety Rules (DSR Sections 3.9, 5.9, 8.2 and 8.3).

An approved device, which shall be tested before and after each use, shall be used to prove a cable dead.

Where a property has one multi-phase service cable this may be proved dead when one or more of the phases has remained live after the fault and those phases can be proved dead by testing at the cut-out position before and after making the cable dead.

Where only one main cable or overhead line supplies a street, that is it supplies both sides, a service cable may be proved dead by testing at the cut-outs located in adjacent premises.

Where local knowledge gives confidence that network records may be used as an indication that the required cable has been made dead. This may apply when there is one main on each side of a road and it is known that all services are connected to the nearest main.

If an identifiable cable is visibly damaged with associated losses of supply and one or more fuses have operated and therefore the point of isolation is known.

ANDAll cables which could credibly energise the fault in the event of incorrect records or labels, and cables which might have been damaged by the fault, have been fused or made dead.

Because of the risk of a feed, such as from a customer’s generator, any work on cables shall be carried out using live jointing techniques even after a cable is proved dead.

8.9 Fusing when working in the vicinity of defective LV cables in the London interconnected system

No work shall take place unless the live cables to be worked on are protected by Ultra High Speed Fuse at an appropriate point in the system.



Wherever practicable, safety fusing shall be by means of one set of fuse links of a size no greater than 315A, installed at the nearest appropriate point of isolation. Permanently installed fuse links of up to 400A, excluding fringe fuse links, may be left in place, where multiple fusing operations would otherwise be required. The following alternatives may, however, be adopted where loading conditions dictate:

One set of 400A fuse links, excluding fringe fuse links, installed at the nearest appropriate point of isolation.

Two sets of fuse links of a size no greater than 315A, installed at the two nearest appropriate points of isolation.

The decision whether or not to fuse or make dead such cables will be made by an Authorised Person after considering the safety of those working and the conditions to allow live working which are detailed in HSS 40 045 Basic Requirements for Live Working on Low Voltage Apparatus.

Where more than one LV cable is present and it is not possible to identify the LV cable to be worked on without disconnecting customers, then all LV cables adjacent to and including the LV cable to be worked on must be fused as above.

Where it is not possible to comply with the above an Authorised Person will decide upon the procedures to be followed.

8.10 Mechanical Excavators

Where site conditions are suitable mechanical excavators may be used to dig to within 300mm of indicated healthy cables providing the requirements of section 8.3 are complied with.

Where a mechanical excavator is to be used and section 8.3 of this procedure cannot be complied with, an Authorised Person must give permission for, and specify the limits and method of its use on the task instruction sheet.

For trench work trial holes should be first dug by hand at intervals along the proposed route to confirm the accuracy of the marking of cable runs.

If tile tape or cable slabs are uncovered use of the mechanical excavator must cease. The cables must then be exposed by hand. Where “hand digging only” has been specified the Site Co-ordinator must get permission from an Authorised Person before an alternative method of excavating can be used.

Mechanical excavators which are used for digging near cables must have a toothless bucket.

9.0 Trenchless TechnologyThe use of trenchless technology should only be considered after the risks to all plant and apparatus, including those belonging to other utilities, have been assessed and control measures put in place.

10.0 Superseded documents This procedure replaces the following documents: HSS 40 012 Work on or Near Damaged and Faulty Cables HSS 40 014 Excavating in the vicinity of buried services London Code of Practice 2 (Part only) SPN Engineering Instruction 9/57/13 - Repairs to Damaged or Faulted LV Cables Operational Bulletin HSS 406 OB 57



Appendix 1 Locating cables, marking the area of excavation and safe digging

A “Digging Card” based on this appendix is available for issue to field staff as DSR 01 014a

Sweeping the proposed area of digging with a cable avoidance tool and marking out an excavation and encroachment lines. (Both patterns must be used)

Use of both power and radio modes will improve detection of other utilities and of cables that are not supplying a load or are supplying a perfectly balanced load.All cable runs either confirmed by use of the cable location device or indicated on mains records must be marked out on the surface using a waterproof marker. Marked cable runs must be extended at least 300 mm beyond the digging area, and must stay visible during digging.


SWEEPING USING THIS PATTERN TO DETECT CABLES RUNNING ACROSS THE HOLE

RUN OF CABLE

SWEEPING USING THIS

PATTERN TO DETECT CABLES

RUNNING ALONG THE

HOLE

RUN OF CABLE

CABLE AVOIDANCE TOOL

CABLE AVOIDANCE

TOOL

MARKED MAIN CABLE AND SERVICE CABLE

RUNS


Marking out an excavation

Marking encroachment lines To be parallel to and at least 300mm away from the outer and innermost cable marker lines


MARKED LINES OF

CABLE RUNS

MARKEDSIZE OF HOLE

TO BE DUG

LINES EXTENDED 300 mmBEYOND AREA TO BE

DUG OUTSERVICE CABLE ROUTE MARKED

AREA OF SURFACE TO BE REMOVED

ENCROACHMENTLINES ARE TO BE

EXTENDED 300 mm BEYOND ALL EDGES OF

THE HOLE

KERB

BACK EDGE OF FOOTPATH


…


The method of removing a surface and undermining where it is necessary to use power tools

Remove surface outsideencroachment lines and start

excavation with hand tools

Undermine surface using hand tools and where possible break off surface with hand tools

Carry on undermining with hand tools and breaking off surface

Until all cables have been exposed

And the joint hole is open POWER TOOLS SHALL ONLY BE USED WHERE NECESSARY:

(1) TO REMOVE THE SURFACE OUTSIDE OF THE ENCROACHMENT LINES

(2) AFTER ALL CABLES SHOWN ON THE PLANS, OR PICKED UP BY THE CABLE AVOIDANCE TOOL, HAVE BEEN EXPOSED BY HAND DIGGING

Cables

Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed Surface to be removed

Documents

DSR 01 014 Excavating Near Electricity Cableslibrary.ukpowernetworks.co.uk/library/asset/f97a1a8b-08a... · Web viewChanges to last paragraph in Section 8.5 regarding the use of the