27427 version 1
Page 1 of 5
NZQA registered unit standard
Title
Demonstrate and apply knowledge of Extra-Low Voltage
requirements and testing for small scale Renewable Energy Systems
Level
4
Purpose
Credits
15
This unit standard is for people who work with renewable
energy systems and covers knowledge of regulations,
standards and practices required for the safe and compliant
installation of extra-low voltage installation requirements for
small scale renewable energy systems.
People credited with this unit standard are able to:
–
demonstrate knowledge of legislation and standards
governing extra-low voltage work for renewable energy
systems;
–
demonstrate knowledge of extra-low voltage installation
requirements for rentable energy systems;
–
select extra-low voltage wiring and circuit protection for
rentable energy systems; and
–
demonstrate and apply knowledge of renewable energy
extra-low voltage installation testing.
Classification
Renewable Energy Systems > Renewable Energy Systems Design
Available grade
Achieved
Entry information
Recommended skills
and knowledge
Unit 27433, Demonstrate knowledge of Renewable Energy
concepts and technologies; and Unit 27439, Demonstrate
knowledge of Photovoltaic Technology.
Explanatory notes
1
This unit standard has been developed for learning and assessment off-job.
2
References
All references to Australian Standards (AS) may be found through the URL
www.standards.org.au;
AS 4086.2:1997, Secondary batteries for use with stand-alone power systems Installation and maintenance;
AS 4509.3:1999, Stand-alone power systems - Installation and maintenance;
AS/NZS 3000:2007, Electrical Installations (known as the Australian/New Zealand
Wiring Rules);
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
27427 version 1
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AS/NZS 3010:2005, Electrical installations - Generating sets;
AS/NZS 4509.1:2009, Stand-alone power systems - Safety and installation;
AS/NZS 4509.2:2010, Stand-alone power systems - System design;
AS/NZS 5033:2005, Installation of photovoltaic (PV) arrays;
Electricity (Safety) Regulations 2010;
Electricity Act 1992;
SAA/SNZ HB3:1996, Electrical and electronic drawing practice for students;
Clean Electricity From Photovoltaics, (Series on Photoconversion of Solar Energy,
Volume 1); edited by Mary D. Archer (Imperial College, UK) and Robert Hill
(University of Northumbria, UK). Published by World Scientific Publishing Company,
2001; ISBN: 1860941613;
Photovoltaic Energy Systems: Design and Installation; by Matthew Buresch;
Published by Mcgraw-Hill May 1983; ISBN-10: 0070089523, ISBN 13: 9780070089525;
Solar Photovoltaic Products: A Guide for Development Workers, by Anthony Derrick,
Catherine Francis, & Varis Bokalders, 1991; Published by: Intermediate Technology
Publications, 103/l 05 Southampton Row, London WCIB 4HH U.K. ISBN 1-85339002-X. Also available at: http://www.fastonline.org/CD3WD_40/JF/431/23-567.pdf. ;
Photovoltaic Power Systems Nver02 Edition: Resource Book, by R Burton and P. M.
Monsour; Published by Brisbane Institute of TAFE, Australia, 2002; ISBN
9781876880293;
Australian Pump Technical Handbook, 4th Edition, December 2007; by Apma
Published by Australian Pump Manufacture Association; ISBN 13: 9780959883954;
and all subsequent amendments and replacements.
3
Definitions
a.c. – alternating current.
Current regulations and standards – in this unit standard this term is used to refer to
the requirements of the above references.
d.c. – direct current.
Enterprise practice – those practices and procedures that have been promulgated by
the company or enterprise for use by their employees.
Industry practice – those practices that competent practitioners within the industry
recognise as current industry best practice.
4
Range
a All measurements are to be expressed in Système Internationale (SI) units, and
where required, converted from Imperial units into SI units.
b Candidates shall be supplied by the assessor with formulae involving more than
three quantities.
c Use of a calculator during assessment is permitted.
d All activities must comply with any policies, procedures, and requirements of the
organisations involved.
e Laboratory and workshop safety practices are to be observed at all times.
f All activities and evidence presented for all outcomes and evidence requirements
in this unit standard must be in accordance with legislation, Enterprise policies,
procedures, ethical code, and current regulations and standards, and industry
practice; and where appropriate, manufacturers’ instructions, specifications, and
data sheets.
ElectroTechnology Industry Training Organisation
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 New Zealand Qualifications Authority 2016
27427 version 1
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NZQA registered unit standard
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of legislation and standards governing extra-low voltage work for
renewable energy systems.
Evidence requirements
1.1
Regulations relevant to extra-low voltage wiring are explained.
1.2
Technical standards and codes that apply to extra-low voltage work are
explained.
Outcome 2
Demonstrate knowledge of extra-low voltage installation requirements for rentable energy
systems.
Evidence requirements
2.1
Requirements for installation and segregation of extra-low voltage wiring and
equipment are described.
2.2
Compliant methods for providing protection for extra-low voltage circuits are
described.
2.3
Requirements for planning, selection, and installation of extra-low voltage
equipment are described.
Outcome 3
Select extra-low voltage wiring and circuit protection for rentable energy systems.
Evidence requirements
3.1
Extra-low voltage and low-voltage circuits are identified in a stand-alone or grid
connected renewable energy system and the regulatory restrictions regarding
work at each level are described.
3.2
Earthing requirements for renewable energy systems for a given range of
applications and environments are described.
3.3
Extra-low voltage cable sizes for a renewable energy system are calculated in
terms of voltage drops and cable current carrying capacity in accordance with
AS/NZS 3000 and AS/NZS 4509.2.
3.4
D.c. circuit protection and isolation is selected for a stand-alone renewable
energy system in accordance with AS/NZS 3000 and AS/NZS 4509.2.
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 New Zealand Qualifications Authority 2016
27427 version 1
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NZQA registered unit standard
Outcome 4
Demonstrate and apply knowledge of renewable energy extra-low voltage installation
testing.
Evidence requirements
4.1
Testing and verification requirements for renewable energy system extra-low
voltage installations are described in accordance with legislation and Standards.
4.2
Tests confirming the compliance and safety of a renewable energy extra-low
voltage installation is conducted and documented in accordance with legislation
and Standards.
4.3
Annual inspection and testing of a renewable energy system extra-low voltage
installation wiring and equipment, including tagging, is conducted and
documented in accordance with legislation and Standards.
Planned review date
31 December 2016
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
21 July 2011
N/A
Consent and Moderation Requirements (CMR) reference
0003
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 (CMRs). 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 ElectroTechnology Industry Training Organisation (ETITO) at
ElectroTechnology Industry Training Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
27427 version 1
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reviewcomments@etito.co.nz if you wish to suggest changes to the content of this unit
standard.
ElectroTechnology Industry Training Organisation
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