NZQA registered unit standard
18273 version 5
Page 1 of 4
Title
Demonstrate knowledge of conductors, insulators, and
semiconductors used in the electricity supply industry
Level
2
Credits
5
Purpose
People credited with this unit standard are able to demonstrate
knowledge of: electrical conductors, insulators,
semiconductors; resistance, resistivity, resistors; and compare
calculated with measured values in resistive circuits.
Classification
Electricity Supply > Electricity Supply - Core Skills
Available grade
Achieved
Explanatory notes
1
This unit standard is intended for assessment off-job. The range statements across
the unit standard can be applied according to industry specific equipment,
procedures, and processes as applied in the electricity supply industry.
2
Safety of personnel and plant must be a priority throughout the assessment. If the
safety requirements are not met the assessment must stop and the candidate will be
assessed as not yet competent.
3
Performance and work practices in relation to the outcomes and evidence
requirements must comply with all current legislation, especially the Electricity Act
1992 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, Safety Manual – Electricity Industry (SM-EI) (2004) Wellington: Electricity
Engineers’ Association.
A full list of current legislation and industry codes is available from:
Infrastructure Industry Training Organisation
PO Box 1245
HAMILTON.
4
The phrase in accordance with industry requirements is implicit in all outcomes and
evidence requirements in this unit standard.
5
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.
Infrastructure Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2015
NZQA registered unit standard
18273 version 5
Page 2 of 4
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.
Asset owner standards are the approved documented work site methods for carrying
out work on an electrical supply network to the standard required by the asset owner.
6
This unit standard is intended for use in the assessment of Distribution and
Transmission Line Mechanics and all terminology should be related to that sector of
the industry.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of electrical conductors, insulators, and semiconductors.
Evidence requirements
1.1
Materials commonly used for conductors and insulators are identified, and their
orders of resistance stated.
Range
1.2
Typical uses of conductors and insulators are stated.
Range
1.3
may include but is not limited to –
conductors – copper, brass, silver, gold, aluminium, steel;
insulators – rubber, polyvinyl chloride (PVC), ceramics;
evidence of three conductor and two insulator materials is
required.
three conductors, three insulators.
Conductor and insulator materials suitable for given environmental conditions
are identified, and reasons for their suitability are stated.
Range
may include but is not limited to –
conductors – copper, silver, gold, aluminium, aluminium alloys,
tungsten, carbon, nichrome, brass;
insulators – glass, mica, oil, ceramics, rubber, PVC;
environmental conditions – heat, moisture, corrosive materials,
dust, tension, compression, vibration;
evidence of one conductor and one insulator material for a
minimum of three environmental conditions is required.
Outcome 2
Demonstrate knowledge of resistance, resistivity, and resistors.
Evidence requirements
2.1
Resistance is described in terms of opposition to current flow.
2.2
The unit for resistance is stated, and the symbol drawn.
Infrastructure Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2015
NZQA registered unit standard
18273 version 5
Page 3 of 4
2.3
Resistivity is described and simple calculations performed using conductor
parameters.
2.4
Ohm's Law is defined.
2.5
The relationship between resistance, voltage, and current is described in terms
of the effect that a change in any quantity has on the other two.
2.6
The concept of insulation resistance of a cable is explained in terms of typical
values and the effect of cable length.
Outcome 3
Practical resistive circuits are calculated, measured and compared.
Range
circuits – series, parallel;
values – resistance, applied electromagnetic field (EMF), volt-drop, current.
Evidence requirements
3.1
Values are calculated for given circuits.
3.2
Values are measured for the same circuits and compared to calculated values.
Planned review date
31 December 2018
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
27 April 2001
31 December 2016
Revision
2
10 September 2004
31 December 2016
Rollover and
Revision
3
20 June 2008
Review
4
19 November 2010
31 December 2016
Review
5
20 March 2014
N/A
31 December 2016
0120
Consent and Moderation Requirements (CMR) reference
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.
Infrastructure Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2015
NZQA registered unit standard
18273 version 5
Page 4 of 4
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 at
qualifications@infrastructureito.org.nz if you wish to suggest changes to the content of this
unit standard.
Infrastructure Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2015