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Title / Demonstrate knowledge of underground power cable installation requirements
Level / 4 / Credits / 4
Purpose / People credited with this unit standard are able to demonstrate knowledge of: underground power cable voltage stress and stress control techniques; cable descriptions and cable design voltages; and cable preparation techniques for jointing
Classification / Electricity Supply > Electricity Supply - Distribution Networks
Available grade / Achieved
Explanatory notes
1 This unit standard is intended for, but not restricted to, workplace assessment. The range statements within the unit standard can be applied according to enterprise specific equipment, procedures and processes.
2 Performance and work practices in relation to the outcomes and evidence requirements must comply with all current legislation, especially the ElectricityAct1992 and any subsequent amendments, and any regulations, codes of practice recognised under that statute, Health and Safety in Employment Act 1992, the Resource Management Act 1991, and their subsequent amendments, electricity supply industry codes of practice and documented enterprise procedures. These include and the latest version of, Safety Manual – Electricity Industry (SM-EI) Wellington: Electricity Engineers’ Association.
A full list of current legislation and industry codes is available from:
Infrastructure Industry Training Organisation
PO Box 1245
Hamilton 3240.
3 The phrase in accordance with industry requirements is implicit in all outcomes and evidence requirements in this unit standard.
4 Definitions
Industry requirements include all asset owner requirements; manufacturers’ specifications; and enterprise requirements which cover the documented workplace policies, procedures, specifications, business, and quality management requirements relevant to the workplace in which assessment is carried out.
Asset owner refers to the owner of an electricity supply network that takes its point of supply from Transpower NZ, and delivers electricity to industrial, commercial and residential customers.
IEC – International Electrotechnical Commission.
IEEE – Institute of Electrical and Electronics Engineers.
5 LV is defined as ‘low voltage’ and includes voltages up to and including 1000 volts ac. and HV is defined as ‘high voltage’ and includes voltages above 1000 volts.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of underground power cable voltage stress and stress control techniques.
Evidence requirements
1.1 Voltage stress in LV and HV cables is described.
Range includes but is not limited to – radial, longitudinal, tangential.
1.2 Stress control techniques are described.
Range includes but is not limited to – screening, geometric, capacitive, belting.
Outcome 2
Demonstrate knowledge of cable descriptions and cable design voltages.
Evidence requirements
2.1 International standards and guidelines related to cable manufacture and installation are described.
Range IEC, IEEE.
2.2 Cable types are described in terms of LV and HV cables.
Range single core, multi-core, polymeric and paper insulated, voltage ratings.
2.3 Cable design voltage ratings are described.
Range LV and HV cables, single core, multi-core cables.
Outcome 3
Demonstrate knowledge of cable preparation techniques for jointing.
Evidence requirements
3.1 Cable bending techniques are described.
Range bending radii for LV, HV, single core, multi-core, polymeric and paper insulated cables.
3.2 Cable stripping techniques of LV and HV cables are described.
Range sheaths, armour, bedding, fillers, lead, paper, screens (metallic, graphite, bonded, tape, wire), semi-conducting layers, and primary insulation.
3.3 Cable insulation preparation and reinstatement techniques are described.
3.4 Cable sheath, shield preparation and reinstatement are described.
3.5 Cable jointing methods are described.
3.6 Use of specialist tools and equipment is described.
Range knives, specialist stripping tools (semi-conducting layers), crimping tools, compression tools, spiking guns, smoothing materials, cleaning liquids, and jointing pastes.
3.7 Work site management requirements are described.
Range work site lay-out, cleanliness standards, weather conditions, moisture control, joint pit design and construction, work site access.
Planned review date / 31 December 2019Status information and last date for assessment for superseded versions
Process / Version / Date / Last Date for Assessment /Registration / 1 / 18 September 2014 / N/A
Consent and Moderation Requirements (CMR) reference / 0120
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Infrastructure Industry Training Organisation if you wish to suggest changes to the content of this unit standard.
Infrastructure ITOSSB Code 101813 / Ó New Zealand Qualifications Authority 2014