network standard - ns209 cranes and plant in proximity to

NW000-S0073 UNCONTROLLED IF PRINTED of 22

Network Standard

NETWORK

Document No Amendment No Approved By Approval Date Review Date

:::::

NW000-S0073 0 Chief Engineer 28/05/2015 01/02/2017

NW000-S0073 NS209 OPERATING CRANES & PLANT IN PROXIMITY TO OVERHEAD POWER LINES

NS209 Operating Cranes & Plant in Proximity to Overhead Power Lines Amendment No 0


ISSUE

For issue to all Ausgrid and Accredited Service Providers’ staff involved with the design and installation of overhead lines, and is for reference by field, technical and engineering staff.

Ausgrid maintains a copy of this and other Network Standards together with updates and amendments on www.ausgrid.com.au.

Where this standard is issued as a controlled document replacing an earlier edition, remove and destroy the superseded document

DISCLAIMER

As Ausgrid’s standards are subject to ongoing review, the information contained in this document may be amended by Ausgrid at any time. It is possible that conflict may exist between standard documents. In this event, the most recent standard shall prevail.

This document has been developed using information available from field and other sources and is suitable for most situations encountered in Ausgrid. Particular conditions, projects or localities may require special or different practices. It is the responsibility of the local manager, supervisor, assured quality contractor and the individuals involved to make sure that a safe system of work is employed and that statutory requirements are met.

Ausgrid disclaims any and all liability to any person or persons for any procedure, process or any other thing done or not done, as a result of this Standard.

All design work, and the associated supply of materials and equipment, must be undertaken in accordance with and consideration of relevant legislative and regulatory requirements, latest revision of Ausgrid’s Network Standards and specifications and Australian Standards. Designs submitted shall be declared as fit for purpose. Where the designer wishes to include a variation to a network standard or an alternative material or equipment to that currently approved the designer must obtain authorisation from the Network Standard owner before incorporating a variation to a Network Standard in a design.

External designers including those authorised as Accredited Service Providers will seek approval through the approved process as outlined in NS181 Approval of Materials and Equipment and Network Standard Variations. Seeking approval will ensure Network Standards are appropriately updated and that a consistent interpretation of the legislative framework is employed.

Notes: 1. Compliance with this Network Standard does not automatically satisfy the requirements of a Designer Safety Report. The designer must comply with the provisions of the Workplace Health and Safety Regulation 2011 (NSW - Part 6.2 Duties of designer of structure and person who commissions construction work) which requires the designer to provide a written safety report to the person who commissioned the design. This report must be provided to Ausgrid in all instances, including where the design was commissioned by or on behalf of a person who proposes to connect premises to Ausgrid’s network, and will form part of the Designer Safety Report which must also be presented to Ausgrid. Further information is provided in Network Standard (NS) 212 Integrated Support Requirements for Ausgrid Network Assets.

2. Where the procedural requirements of this document conflict with contestable project procedures, the contestable project procedures shall take precedent for the whole project or part thereof which is classified as contestable. Any external contact with Ausgrid for contestable works projects is to be made via the Ausgrid officer responsible for facilitating the contestable project. The Contestable Ausgrid officer will liaise with Ausgrid internal departments and specialists as necessary to fulfil the requirements of this standard. All other technical aspects of this document which are not procedural in nature shall apply to contestable works projects.

INTERPRETATION

In the event that any user of this Standard considers that any of its provisions is uncertain, ambiguous or otherwise in need of interpretation, the user should request Ausgrid to clarify the provision. Ausgrid’s interpretation shall then apply as though it was included in the Standard, and is final and binding. No correspondence will be entered into with any person disputing the meaning of the provision published in the Standard or the accuracy of Ausgrid’s interpretation.

KEYPOINTS

This standard has a summary of content labelled “KEYPOINTS FOR THIS STANDARD”. The inclusion or omission of items in this summary does not signify any specific importance or criticality to the items described. It is meant to simply provide the reader with a quick assessment of some of the major issues addressed by the standard. To fully appreciate the content and the requirements of the standard it must be read in its entirety.

AMENDMENTS TO THIS STANDARD

Where there are changes to this standard from the previously approved version, any previous shading is removed and the newly affected paragraphs are shaded with a grey background. Where the document changes exceed 25% of the document content, any grey background in the document is to be removed and the following words should be shown below the title block on the right hand side of the page in bold and italic, for example, Supersedes – document details (for example, “Supersedes Document Type (Category) Document No. Amendment No.”).

KEY POINTS OF THIS STANDARD


General Safety and Conditions of Close Approach

Authorisation and Training Requirements

Plant Considerations Scope and Risks Addressed

Tools and Forms None

Tools and Forms None

This network standard applies to any work by Ausgrid personnel or by others working for Ausgrid using a crane or plant required to be carried out in proximity to live overhead electrical apparatus:

Applies to both electrical work and non-electrical work being undertaken by the plant.

Minimum approach distances are specified and apply for different voltage levels of the overhead mains being approached. Approaching closer than these distances requires the permission of the owner of the electrical apparatus and implementation of the requirements of this network standard.

Hazard assessment and appropriate controls applied before work commences.

Clearances apply to the plant, all of its components and the attached load.

Electrical apparatus must be de-energised where possible as a first option to perform any work.

Where to for more information? Section 1, 2, 5

The electrical safety requirements applying to the operators of plant approaching within the minimum approach distances include:

Notification of intent to approach within the minimum safe distances based on voltage level of the live electrical apparatus.

Specific conditions for approval to operate plant within the minimum safe working distance may be required based on the specific site conditions and situation.

A copy of this network standard must be kept on the plant.

Warning notices must be applied as required.

All personnel involved in the work must be instructed.

The operator must be accredited or qualified as required by this network standard.

A safety observer must be appointed as required by this network standard.

Under emergency conditions written notification of intent to approach within minimum clearances need not be given provided the other requirements of this network standard are met.

Personnel engaged in the work must be accredited or qualified as required and the requirements apply to:

The owner of the plant The operator of the plant An appointed safety observer.

Safety observers must:

Be appointed at any time the plant is in motion.

Only control a single machine/plant at any one time

Suitably accredited or qualified.

Operators and safety observers of the plant must:

Have completed the required training course and demonstrated proficiency.

Demonstrated ability to perform approved rescue procedure within previous 12 months

Some conditions apply differently to qualified electrical tradespersons.

Whilst operating the plant:

Operators must wear appropriate PPE and take the required precautions

Restrictions apply as to whom may be in contact with the crane or load during its operation in close proximity.

The plant must be positioned and operated in a stable location.

Slewing, luffing or other motion of the plant must be physically limited to prevent operation within the clearances permitted.

Induced voltages may also occur which do not require direct physical contact with live apparatus.

Special provisions apply where the plant is considered fully insulated in accordance with this network standard

Testing of any insulating material must occur on a regular basis not exceeding six-months.

Specific requirements relate to provision of certification documents , training records and competency test results.

Tools and Forms Annexure A and B – Example Warning

notices

Where to for more information? Section 6, 7, 8, 9

Where to for more information? Section 10, 11, 12

Where to for more information? Section 13-20



Network Standard NS209

Operating Cranes and Plant in Proximity to Overhead Power Lines

Contents

PURPOSE ............................................................................................................................................. 5 1.0

SCOPE .................................................................................................................................................. 5 2.0 General ...................................................................................................................................... 5 2.1 Proximity to overhead power lines ............................................................................................. 5 2.2 Application .................................................................................................................................. 6 2.3

REFERENCES ...................................................................................................................................... 6 3.0 Ausgrid documents .................................................................................................................... 6 3.1 Other standards and documents ................................................................................................ 6 3.2 Acts and regulations................................................................................................................... 6 3.3

DEFINITIONS ........................................................................................................................................ 7 4.0

GENERAL SAFETY PRECAUTIONS .................................................................................................... 9 5.0

NOTIFICATION OF NEED TO WORK CLOSER THAN THE MINIMUM APPROACH DISTANCES IN 6.0THIS NETWORK STANDARD .............................................................................................................. 9

CONDITIONS OF CLOSE APPROACH TO ELECTRICAL APPARATUS ........................................... 9 7.0

EMERGENCY CONDITIONS .............................................................................................................. 10 8.0

NOTICES TO BE CARRIED AND INSTALLED ON THE CRANE OR PLANT ................................... 10 9.0

PERSONNEL ENGAGED ON THE WORK ......................................................................................... 10 10.0

TRAINING OF PERSONNEL ENGAGED ON THE WORK ................................................................ 11 11.0

RESPONSIBILITY FOR COMPLIANCE WITH THIS NETWORK STANDARD .................................. 12 12.0

PERSONNEL IN CONTACT WITH THE CRANE, LOAD OR PLANT ................................................ 12 13.0

STABILITY OF THE CRANE, LOAD OR PLANT ................................................................................ 13 14.0

WARNING – VOLTAGES INDUCED BY ELECTRIC FIELDS ............................................................ 13 15.0

MINIMUM APPROACH DISTANCES TO LIVE ELECTRICAL APPARATUS ..................................... 14 16.0

EFFECTIVE INSULATION OF ELEVATING WORK PLATFORMS .................................................... 16 17.0

EFFECTIVE INSULATION OF MECHANICAL AND ELECTRICAL APPARATUS ............................. 16 18.0

TESTING OF THE INSULATION ........................................................................................................ 16 19.0

DOCUMENTATION AND RECORDS TO BE MAINTAINED .............................................................. 17 20.0

RECORDKEEPING ............................................................................................................................. 17 21.0

AUTHORITIES AND RESPONSIBILITIES .......................................................................................... 18 22.0

DOCUMENT CONTROL...................................................................................................................... 18 23.0

ANNEXURE A WARNING NOTICE FOR ELECTRICAL HAZARDS ........................................................... 19

ANNEXURE B WARNING NOTICES - PROVISIONS OF THIS NETWORK STANDARD ....................... 20



PURPOSE 1.0

This network standard together with other referenced standards and guidelines is intended to continue the provisions of the now discontinued document - Interim Guide for Operating Cranes and Plant in Proximity to Overhead Power Lines (ISSC26) for work done by Ausgrid personnel or by others working for Ausgrid.

Note: Wherever the term ISSC 26 (or its predecessor, the Certificate of Exemption No. 5099) appears as a reference in any Ausgrid document, it should be interpreted as now meaning this network standard (NS209).

SCOPE 2.0

General 2.1This network standard applies to any work by Ausgrid personnel or by others working for Ausgrid using a crane or plant required to be carried out in proximity to live overhead electrical apparatus and which comprises:

(a) Electrical work

Work on or connected with the construction, erection, maintenance, adjustment or dismantling of electrical installations, public lighting, electric substations, high voltage areas, switchyards, electrical transmission or distribution systems and includes trimming of trees near electrical apparatus.

(b) Non-electrical work

Work not directly connected with electrical systems or apparatus such as building work, landscaping, landfill work, excavations, road works and includes the construction, maintenance, adjustment or dismantling of drainage sewerage and water supply systems.

Proximity to overhead power lines 2.2All operators of cranes or plant must be aware of the hazards of live overhead electrical apparatus. Refer to Section 5 below.

Except where the work is being undertaken in accordance with the specific requirements and precautions of this network standard, cranes*, loads, plant and component parts must not approach closer to live electrical apparatus than the minimum approach distances appropriate to the voltage concerned, shown in Table 1, below:

Table 1: Minimum Approach Distances of Cranes, Plant and Loads to Live Electrical Apparatus

Caution: To determine the voltage level of the electrical apparatus, the operator of the crane or plant must refer to Ausgrid, unless the operator can positively identify it him/herself.

*Note: Grab cranes or floating cranes or their loads must not approach closer than the above minimum approach distances under any circumstances.



Application 2.3This network standard is intended to be communicated to and used by all Ausgrid employees or others who work for Ausgrid when operating cranes or plant which work, or may work, in proximity to overhead power lines.

This network standard should be applied on the basis that -

appropriate workplace hazard and risk assessment and management processes are carried out; and

the safe approach distances used are selected according to the level of qualification and training of the personnel concerned (as set out in the network standard), and the work to be performed.

REFERENCES 3.0

Ausgrid documents 3.1 Bushfire Risk Management Plan Company Form (Governance) - Network Document Endorsement and Approval Company Procedure (Network) - Production / Review of Network Standards Company Procedure (Governance) - Network Document Endorsement and Approval Customer Installation Safety Plan Electrical Safety Rules Public Electrical Safety Awareness Plan Public Lighting Management Plan Tree Safety Management Plan

Other standards and documents 3.2 AS 1418.10:2011 Cranes, hoists and winches – Mobile elevating work platforms. ENA Doc 001-2008 National Electricity Network Safety Code Guide for Operating Cranes & Plant in Proximity to Overhead Power Lines (published by the

Electricity Association of NSW, July 2001) ISSC 26 Interim Crane Plant Guide (withdrawn) WorkCover – Work near overhead power lines – Code of Practice - 2006

Acts and regulations 3.3 Electricity Supply (General) Regulation 2014 (NSW)

Electricity Supply (Safety and Network Management) Regulation 2014

Work Health and Safety Act 2011 and Regulation 2011



DEFINITIONS 4.0

Accredited Service Provider (ASP)

An individual or entity accredited by the NSW Government Trade & Investment in accordance with the Electricity Supply (Safety and Network Management) Regulation 2014 (NSW).

Business Management System (BMS)

An Ausgrid internal integrated policy and procedure framework that contains the approved version of documents.

Competency The possession and application of both knowledge and skills to defined standards, expressed as outcomes, that correspond to relevant workplace requirements and other vocational needs. (AQF Advisory Board, 1998)

Crane Any type of crane, including an elevating work platform, whether independent or an integral part of another piece of equipment (including an agricultural tractor), or any other apparatus used or capable of being used for raising, lowering, handling or transporting materials or equipment in a similar manner, and includes any supporting structure and any other equipment ancillary to the use of the crane or apparatus.

earth moving machine means an item of plant used for the purpose of excavating, transporting, unloading compacting or spreading earth, overburden, rubble, spoil, paving material, aggregate or similar material and includes a back hoe and a bulldozer.

Document control

Ausgrid employees who work with printed copies of document must check the BMS regularly to monitor version control. Documents are considered “UNCONTROLLED IF PRINTED”, as indicated in the footer.

Electrical apparatus

Any live aerial electrical conductor which is not effectively insulated or guarded.

Any plant in which there are live conductors used or designed for the conveyance of electricity, being bare conductors which are not effectively insulated or guarded.

But does not include any electrical apparatus where the difference in potential between its conductors, or to earth, does not exceed 50 volts AC or 120 volts DC.

Electrical tradesperson

A person who holds a certificate in Electrical Engineering or who has completed a recognised apprenticeship in the electrical trade or who holds a licence or certificate issued by a statutory body which allows the person to carry out limited or unlimited electrical work and for the purposes of this Network Standard includes persons holding an electrical degree or diploma acceptable for admission to the Institution of Engineers Australia.

Elevating work platform

A telescoping device, scissor device, or articulating device or any combination of those devices used to move and position personnel, equipment and materials to and from or at work locations above or below the support surface.

Hoist Any type of powered hoist, whether independent or an integral part of another piece of equipment, or any other powered apparatus used or capable of being used for raising or lowering materials or equipment or other loads in a similar manner (including any inclined skid or slipway, a tilter, any machine used for boring holes in soil or rock and any machine used for or capable of being used for driving or pulling down any pile), and includes any supporting structure and any other equipment ancillary to the use of the hoist or apparatus.

Load Any substance, material or object being moved, carried, lifted or supported or



which is in rotary or vertical motion, in association with a crane or plant, excluding persons and hand-held tools located on an elevating work platform.

Network Standard

A document, including Network Planning Standards, that describes the Company's minimum requirements for planning, design, construction, maintenance, technical specification, environmental, property and metering activities on the distribution and transmission network. These documents are stored in the Network Category of the BMS repository.

Plant Includes any powered machinery, equipment, earth moving machine, hoist or appliance, and any article designed for use as a component in, or as an accessory to, any powered machinery, equipment or appliance, but excludes hand tools and powered hand tools.

Review date The review date displayed in the header of the document is the future date for review of a document. The default period is three years from the date of approval. However a review may be mandated at any time where a need is identified due to changes in legislation, organisational changes, restructures, occurrence of an incident or changes in technology or work practice.



GENERAL SAFETY PRECAUTIONS 5.0

Before proceeding onto a worksite with a crane or plant an inspection must be made to identify any live electrical apparatus in the area of the work. An assessment must then be made to determine if the electrical apparatus can be de-energised. If not, then the assessment is to determine if:

the provisions of this network standard can be implemented; there are any factors on the worksite which could contribute to an electrical hazard; and the crane, elevating work platform or plant can be operated within its rated load capacity while

maintaining the required clearances.

Attention must also be given to the nature of the load to be moved and particular care must be taken in securing the load and maintaining clearances where the load is to be lifted over the electrical apparatus.

NOTIFICATION OF NEED TO WORK CLOSER THAN THE 6.0MINIMUM APPROACH DISTANCES IN THIS NETWORK STANDARD

Before commencing any work with any crane or plant which will require the crane, load or plant to approach closer than the minimum approach distances to electrical apparatus specified in Table 1 of this network standard, the owner of the crane or plant, the person responsible for the operation of the crane, or the person having immediate control of the crane or plant:

must inform the organisation that owns, operates, leases or maintains the electrical apparatus in writing of the nature and duration of the intended work; and

must not proceed with such work unless approval has been granted in writing by such organisation to proceed in compliance with the conditions of this network standard and, where provided by the organisation, any further conditions imposed under Section 7 of this network standard.

However, this written notification and approval is not required for electrical work carried out by employees of Ausgrid or others working for Ausgrid on, or connected with electrical apparatus owned, leased or maintained by Ausgrid.

CONDITIONS OF CLOSE APPROACH TO ELECTRICAL 7.0APPARATUS

In granting permission under Sections 6 or 8 of this network standard, Ausgrid can impose such further conditions considered appropriate for the safe operation of the crane or plant.



EMERGENCY CONDITIONS 8.0

Under extenuating circumstances where there is serious and immediate risk to life, health, property or the environment, the written notification and approval required under Section 6 of this network standard need not be complied with provided that the Ausgrid is given notification of the circumstances and all other provisions of this network standard are complied with.

NOTICES TO BE CARRIED AND INSTALLED ON THE CRANE 9.0OR PLANT

(a) A copy of this network standard must be kept in a convenient and protected location on the crane or plant so that it is readily available to all personnel concerned.

(b) The crane or plant must bear the following notices which must be located at each set of controls and which must be visible to the operator of the controls:

(i) a warning notice as depicted in Annexure A of this network standard, together with

(ii) a warning notice as set out in Annexure B of this network standard, advising of the provisions of the network standard (or, for cranes or plant commissioned before the date of introduction of this network standard, the equivalent existing notice installed under the provisions of the former Certificate of Exemption No. 5099). Where the crane is an elevating work platform the warning notice must be located in a visible location in or adjacent to the work basket.

PERSONNEL ENGAGED ON THE WORK 10.0

Whilst the crane or plant is carrying out work or preparing to carry out work in position under the provisions of this network standard, the following clauses must be complied with irrespective of whether the crane, load, plant or electrical apparatus is provided with effective insulation:

(a) General Requirement

All personnel engaged in the work must have been instructed in the requirements of this network standard and the manner of complying with these requirements.

(b) The Operator

The operator of the crane or plant or the operator of the work basket of an elevating work platform must be a person accredited or qualified under Section 11 of this network standard.

(c) The Safety Observer

(i) The owner of the crane or plant, the person in charge of the work or the operator of the crane or plant is responsible for appointing a safety observer to observe the approach of the crane, plant or load to electrical apparatus and to warn the operator in sufficient time to ensure all clearances as prescribed are maintained.

(ii) The safety observer must be appointed at any time the crane, plant or load is in motion and is likely to move within the approach distances provided in Column C of Table 2 in Clause 16 (a).

(iii) The safety observer must be a person accredited or qualified under Section 11 of this network standard.

(iv) The safety observer must not be required to carry out any other duty during the period of observance.

(v) The safety observer must not be required to observe more than one crane or plant at any period of observance.



(vi) The safety observer required under this clause must not be located on the work basket of an elevating work platform during the period of observance.

(vii) A safety observer is not required for an item of plant which has been completely erected and comprises stationary plant which is not located below the electrical apparatus and is located horizontally outside the minimum approach distances given in Clause 16 (a).

(viii) A safety observer is no longer required after an effective limiting device has been set to prevent any component part of a crane, plant or load approaching closer than the minimum approach distances in Table 2 of Clause 16 (a) provided that the limiting device is effective under stress conditions and the limiting device is inspected and tested at regular intervals.

TRAINING OF PERSONNEL ENGAGED ON THE WORK 11.0

The operator of the crane or plant and the safety observer required by this network standard must have:

(a) successfully completed a course of training known as the “Crane and Plant Electrical Safety Course” or an equivalent course which had been approved for the purpose by the then Electricity Association of NSW, or alternatively, achieved formal recognition of the necessary competencies specified for that course (i.e. “recognition of current competencies,” or RCC).

(b) within the previous twelve months demonstrated their ability to apply rescue procedure in the event of an accident associated with electrical apparatus and their ability to apply resuscitation procedure.

(c) following completion or recognition of the “Crane and Plant Electrical Safety Course,” successfully undertaken a competency assessment in the “Crane and Plant Electrical Safety Course” at an interval no greater than twelve months from the previous assessment.

However, a person who is a qualified electrical tradesperson or is trained or formally qualified to work on overhead electrical apparatus need not comply with the provisions of Parts (a) and (c) of this clause if they have received instruction in the requirements of this network standard and the manner of complying with these requirements.

Note: Existing training/authorisations under the former ISSC 26 and Training modules based on the former ISSC 26 are deemed to meet the requirements of this network standard until further notice.



RESPONSIBILITY FOR COMPLIANCE WITH THIS NETWORK 12.0STANDARD

Any crane load or plant which is at rest, travelling or in motion in accordance with this network standard must comply with the provisions of this network standard, and in particular:

(a) The owner of the crane or plant and the person having immediate control of the operation of the crane or plant, must ensure that the relevant provisions of this network standard are complied with, and in any case must not hinder, obstruct or attempt to prevent the provisions of this network standard being complied with.

(b) The safety observer and the operator of the crane or plant must exercise due diligence to ensure that the relevant provisions of this network standard are complied with.

(c) A person or an organisation requesting or approving work under contract, by agreement or otherwise, must as far as is practicable ensure that the relevant provisions of this network standard are complied with, and in any case must not hinder, obstruct or attempt to prevent the provisions of this network standard being complied with.

PERSONNEL IN CONTACT WITH THE CRANE, LOAD OR 13.0PLANT

(b) General

Except as provided in this Clause no one may be instructed or allowed to remain in contact with any part of a crane, load or plant and the ground or earthed situation during the period the crane or plant is being operated under the provisions of this network standard.

(c) The Operator

The operator may operate the controls of cranes or plant while standing on the ground or while in contact with an earthed situation only if one or more of the following provisions are complied with:

(i) The controls are effectively insulated in accordance with Section 18.

(ii) The operator wears insulating gloves where the voltage of any overhead electrical apparatus does not exceed 1000 volts.

(iii) The operator stands on an equipotential metallic mat which is electrically connected to all metalwork associated with the controls.

(d) Personnel on the Worksite

Personnel on the worksite may contact the crane, plant or load while standing on the ground or while in contact with an earthed situation only under the following conditions:

(i) The direct or indirect personal contact with a load consisting of a wood pole where the voltage of any overhead electrical apparatus does not exceed 1000 volts

(ii) The holding of a non-conductive tail rope which is used to control movement of the load

(iii) The positioning or removal of gear from a crane hook or the load

(iv) The adjusting of outriggers, jacks, packings, chocks or the like which is done without movement of a crane or load



(v) The situation where effective insulation is provided on the electrical apparatus, the crane, load or plant or the component parts, such that should contact occur with the electrical apparatus, personnel would not be subject to electric shock

(vi) The situation where the voltage of any overhead electrical apparatus does not exceed 1000 volts and insulating gloves are worn

STABILITY OF THE CRANE, LOAD OR PLANT 14.0

Where by any reason of terrain, prevailing weather or the functional behaviour of the crane, load or plant the danger of inadvertent contact with electrical apparatus may be reasonably foreseen, appropriate measures must be taken to avoid such contact. Such appropriate measures may include one or more of the following precautions:

(a) The ground or surface upon which the appliance or load is required to move must be prepared so as to minimise upward surge or inertia actions.

(b) The slewing, luffing or other motion of a crane must be mechanically prevented from being moved by power within the clearances permitted by this network standard.

(c) The jib, boom, or other member likely to contact electrical apparatus as a result of surge or inertia of the appliance must be mechanically constrained from so doing.

(d) The load must be controlled by non-conductive tail ropes at all times where uncontrolled sway or tilt could cause encroachment on the minimum approach distances prescribed by this network standard.

WARNING – VOLTAGES INDUCED BY ELECTRIC FIELDS 15.0

When working in proximity to voltages exceeding 132,000 volts, precautions against any hazards caused by induced voltages should be taken by the owner or operator of the crane or plant in accordance with any instructions given by the organisation that owns, operates, leases or maintains the electrical apparatus.



MINIMUM APPROACH DISTANCES TO LIVE ELECTRICAL 16.0APPARATUS

(a) Cranes, Plant, Loads and Appointment of Safety Observer

(i) Except where effective insulation is provided in accordance with this network standard, and where required under Section 6 approval has been granted, cranes, loads, plant and component parts must not approach closer to live electrical apparatus than the minimum approach distances appropriate to the voltage provided in Column B of Table 2.

(ii) A safety observer required under Section 10 must be appointed at any time the crane, plant or load is in motion and is likely to move within the distances provided in Column C of Table 2.

These approach distances apply only when working under the conditions of the interim guide for operating cranes and plant in proximity to overhead power lines, using a trained safety observer

For definitions of electrical and non-electrical work, see Clause 2.1 of this standard.

Table 2: Minimum approach distances of cranes plant and loads to live electrical apparatus

NOMINAL VOLTAGE

A

**MINIMUM APPROACH DISTANCE USING AN

OBSERVER

B

**MINIMUM APPROACH DISTANCE WITHOUT AN

OBSERVER

C

ELECTRICAL

WORK

NON ELECTRICAL

WORK

ELECTRICAL WORK

NON ELECTRICAL

WORK

Up to 1 000V 500mm 1000mm 1000mm 3000mm

Above 1 000V but not exceeding 11 000V

700mm 1200mm* 1400mm 3000mm


1000mm 1500mm 2000mm 3000mm


1500mm 2000mm 3000mm 3000mm


2500mm 3000mm 5000mm 6000mm


3000mm 3500mm 6000mm 6000mm

Above 330 000V 4000mm 4500mm 8000mm 8000mm

*For rail traction systems of nominal 1500VDC the minimum approach distance for non electrical work may be reduced from 1200mm to 1000mm.

**See also Clause 16(c).



(b) Personnel and Hand Held Tools

Personnel carrying out any work associated with a crane or plant and persons carrying out work from an elevating work platform must not allow any part of their body or take any hand held tools or equipment not insulated for the voltage concerned closer to exposed live electrical apparatus than the minimum approach distances specified in Table 3.

Electrical tradespersons and people who are qualified to work on overhead electrical apparatus, or who are undergoing a course of training for such qualification may work to the minimum approach distances provided in Column B of Table 3 and may approach closer than those distances when recognised safe working procedures are adopted. Personnel who are not qualified to work on overhead electrical apparatus must at all times work to the minimum approach distances provided in Column C of Table 3.

Table 3: Minimum approach distances of personnel and hand held tools to live electrical apparatus


(c) General Provisions

(i) Electrical apparatus which has a plastic or rubber covering must not be regarded as being effectively insulated in accordance with Section 18 unless the plastic or rubber covering has been confirmed as being effective insulation by Ausgrid.

(ii) Where two or more voltages are located on the electrical apparatus the minimum approach distance appropriate to each of the voltages must be maintained at all times.

(iii) During work near live overhead electrical conductors which are supported on poles or other structures, all distances given in the tables to Clause 16(a) and 16(b) must be increased horizontally by the distance the conductor may swing at the point of work.

(iv) Where the minimum approach distance provided in this clause cannot be maintained or the provisions of this network standard cannot be complied with, the electrical apparatus may need to be de-energised by agreement with Ausgrid, to allow safe operation of the crane or plant in accordance with the Electrical Safety Rules (ESR). Work must not proceed unless the electrical apparatus has been de-energised and made safe.



EFFECTIVE INSULATION OF ELEVATING WORK 17.0PLATFORMS

For the purposes of Section 16 of this network standard, an elevating work platform must be regarded as being insulated only if the work basket is fully insulated to prevent inadvertent exposure to persons on the work basket to a difference of potential between the structural components of the work basket, and the insulation of the elevating work platform complies in other regards to Australian Standard 1418.10 entitled Cranes, hoists and winches – Mobile elevating work platforms.

EFFECTIVE INSULATION OF MECHANICAL AND 18.0ELECTRICAL APPARATUS

(a) Any electrical apparatus or crane or plant, including the controls, or any load carried or moved by such crane or plant or any tools may be considered to be insulated only if the electrical apparatus, the crane, plant, controls, load, or tools comply with the insulation requirements of a relevant Australian Standard;

(b) If a relevant or suitable Australian Standard does not exist then Ausgrid may approve the insulation and the conditions of its use for the electrical apparatus, the crane, plant, controls, load or tools for the purposes of this network standard.

TESTING OF THE INSULATION 19.0

(a) Where the crane, plant, tools or insulating material are to be considered effectively insulated for the voltage concerned in terms of this network standard, the owner or the organisation responsible for the operation of the crane, plant, tools or insulating material must ensure that such tests are carried out as are necessary to ensure that the integrity of the insulation is maintained.

(b) The tests required under Part (a) of this clause must where appropriate comply with a relevant Australian Standard.

(c) The tests required under Part (a) of this clause must be carried out as often as necessary to ensure the insulation is effective, with particular attention being given to situations where the insulation is subject to contamination or damage. In any case the interval between tests should not exceed six months.



DOCUMENTATION AND RECORDS TO BE MAINTAINED 20.0

(a) A person or organisation providing the training, refresher training or competency assessment required by this network standard must provide written certification to the person who has successfully completed such training or assessment.

(b) The owner of the crane or plant or the employer of employees engaged on the work whether by contract or otherwise must maintain:

(i) a record of all approvals and notifications required by this network standard.

(ii) a record of all employees who have been trained, assessed or who hold appropriate qualifications or accreditation required by this network standard.

(iii) where the crane or plant is required or deemed to be insulated, a record carried on the crane or plant or an attachment fitted to it, indicating the date of the most recent electrical test carried out on it and the voltage at which it is to be rated.

(c) A person or organisation requesting or approving the work under contract, by agreement or otherwise, must satisfy itself by agreement or otherwise that records have been maintained of:

(i) all approvals and notifications required by this network standard.

(i) the appropriate training, competency assessment, qualifications or accreditation of all persons engaged on the work as required by this network standard.

(iii) all cranes and plant to be engaged on the work, and any electrical tests carried out on them.

RECORDKEEPING 21.0

The table below identifies the types of records relating to the process, their storage location and retention period.

Table 4 – Recordkeeping

Type of Record Storage Location Retention Period*

Approved copy of the network standard

BMS Network sub process Standard – Company

Unlimited

Draft Copies of the network standard during amendment/creation

TRIM Work Folder for Network Standards (Trim ref. 2014/21250/124)

Unlimited

Working documents (emails, memos, impact assessment reports, etc.)

TRIM Work Folder for Network Standards (Trim ref. 2014/21250/124)

Unlimited

* The following retention periods are subject to change eg if the records are required for legal matters or legislative changes. Before disposal, retention periods should be checked and authorised by the Records Manager.



AUTHORITIES AND RESPONSIBILITIES 22.0

For this network standard the authorities and responsibilities of Ausgrid employees and managers in relation to content, management and document control of this network standard can be obtained from the Company Procedure (Network) – Production/Review of Network Standards. The responsibilities of persons for the design or construction work detailed in this network standard are identified throughout this standard in the context of the requirements to which they apply.

DOCUMENT CONTROL 23.0

Content Coordinator : Manager – Electrical Safety and Authorisations

Distribution Coordinator : Engineering Information and Services Manager



Annexure A Warning Notice for Electrical Hazards

Existing plate fitted to cranes and plant commissioned before July 2001

Alternative plate for cranes and plant (Dimensions 150 mm wide, 100 mm high, except if small plant item)



Annexure B Warning Notices - Provisions of this Network Standard

Notice 1: to be installed at each set of controls adjacent to the notice shown in Annexure A:

EITHER: in the case of equipment commissioned before July 2001, the existing notice installed under the provisions of the former Certificate of Exemption No. 5099,

OR: in the case of equipment commissioned after July 2001, the notice below:

CONDITIONS FOR REDUCED CLEARANCES FROM ELECTRICAL APPARATUS

The interim Guide for Operating Cranes & Plant in Proximity to Overhead Power Lines (published by the Electricity Association of NSW, July 2001) allows for a closer approach to electrical apparatus than the accepted minimum distances of 3 metres for voltages up to 132,000, 6 metres for voltages above 132,000 and up to 330,000, and 8 metres for voltages above 330,000.

Personnel working under the provisions of this Guide must be fully aware of the conditions under which the closer approach is permitted, both during travelling to and at the work site.

Where a copy of the Guide is not provided or available on the crane or plant, the information should be sought from the person in charge of carrying out the work.

Tables 2 and 3: to be fixed below Notice 1 (or combined with it), or, if space is insufficient, adjacent to the operating controls in an easily read position.

EITHER: in the case of equipment commissioned before July 2001, the existing notices installed under the provisions of the former Certificate of Exemption No. 5099,

OR: in the case of equipment commissioned after July 2001, the notices below:



THESE APPROACH DISTANCES APPLY ONLY WHEN WORKING UNDER THE CONDITIONS OF THE INTERIM GUIDE FOR OPERATING CRANES AND PLANT IN

PROXIMITY TO OVERHEAD POWER LINES, USING A TRAINED SAFETY OBSERVER

FOR DEFINITIONS OF ELECTRICAL AND NON-ELECTRICAL WORK, SEE CLAUSE 2.2 OF THE GUIDE

TABLE 2

MINIMUM APPROACH DISTANCES OF CRANES PLANT AND LOADS TO LIVE ELECTRICAL APPARATUS





THESE APPROACH DISTANCES APPLY ONLY WHEN WORKING UNDER THE CONDITIONS OF THE INTERIM GUIDE FOR OPERATING CRANES AND PLANT IN

PROXIMITY TO OVERHEAD POWER LINES, USING A TRAINED SAFETY OBSERVER

FOR FURTHER INFORMATION REFER TO THE GUIDE

TABLE 3

MINIMUM APPROACH DISTANCES OF PERSONNEL AND HAND HELD TOOLS TO LIVE ELECTRICAL APPARATUS

