NZQA registered unit standard
28020 version 1
Page 1 of 5
Title
Demonstrate knowledge of safe working electrical practices for
Electricity Supply Workers
Level
2
Purpose
Credits
5
This unit standard meets the requirements of safe working
practices for electricity supply workers as required by the
Electrical Workers Registration Board for limited trainee
certificate.
People credited with this unit standard are able to demonstrate
knowledge of: the use of electrical test instruments suitable to
measure an energised supply; a method used to identify an
energised electrical circuit and the procedures for
disconnection and isolation of the energised electrical circuit;
hazardous nature of electricity and methods of how personal
protection is applied to reduce exposure to electrical shock;
and the use of protection equipment against electric shock in
the electricity supply environment.
Classification
Electricity Supply > Electricity Supply - Core Skills
Available grade
Achieved
Explanatory notes
1
This unit standard is intended for learning and assessment off-job.
2
Under the Electricity Amendment Act 2006 the Electrical Workers Registration Board
(EWRB) has a responsibility to set registration criterion for electrical workers and
ensure that all persons applying for electrical registration are competent.
Electricity Supply Industry Training Organisation
SSB Code 101813
© New Zealand Qualifications Authority 2013
NZQA registered unit standard
28020 version 1
Page 2 of 5
3
Performance and work practices in relation to the outcomes and evidence
requirements must comply with all current legislation, especially the Electricity Act
1992, Electricity Amendment Act 2010 and any regulations and codes of practice
recognised under that statute; the Health and Safety in Employment Act 1992; and
the Resource Management Act 1991. Electricity supply industry codes of practice
and documented industry procedures include the current version of the Safety
Manual – Electricity Industry (SM-EI) (Wellington: Electricity Engineers’ Association),
and occupational safety and health codes of practice. A full list of current legislation
and industry codes is available from the Electricity Supply Industry Training
Organisation, PO Box 1245, Waikato Mail Centre, Hamilton 3240.
4
References
AS/NZS 3000:2007, Electrical Installations (known as the Australian/New Zealand
Wiring Rules), including Amendment 1;
Electricity (Safety) Regulations 2010 Schedule 2 Standards;
Electricity (Safety) Regulations 2010;
Electricity Act 1992;
AS/NZS 3760:2010, In-service safety inspection and testing of electrical equipment,
including Amendment 1;
AS/NZS 4836:2011, Safe working on or near low-voltage electrical installations and
equipment;
AS/NZS 60479.1:2010 Effects of current on human beings and livestock - General
aspects;
Electrical Workers Registration Board, Supervision Procedures for Trainees;
(October 2010), Wellington, available at
http://www.ewrb.govt.nz/content/publications/Supervision_Procedures_for_Trainees_
Oct_2010.pdf;
and all subsequent amendments and replacements.
Electricity supply industry codes of practice and documented industry procedures
include the current version of the Safety Manual – Electricity Industry (SM-EI)
(Wellington: Electricity Engineers’ Association).
5
The prove-test-prove method refers to proving the instrument before and after a test
to ensure that it works properly, and is particularly important when confirming
electrical isolation. Some instruments have fused leads and may give false indication
of isolation if the fuse is open circuit or blows during the test. Proving is done by
applying the instrument to a circuit that is known to be energised and observing the
measured voltage, testing the circuit to be isolated to ensure it is in fact isolated, then
proving the instrument again on a circuit that is known to be energised.
6
The phrase in accordance with industry requirements is implicit in all outcomes and
evidence requirements in this unit standard.
7
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.
8
Simulated electrical workplace installation is recommended, but not limited to, in
order to meet the demonstration outcome of this unit standard.
Electricity Supply Industry Training Organisation
SSB Code 101813
© New Zealand Qualifications Authority 2013
NZQA registered unit standard
28020 version 1
Page 3 of 5
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of the use of electrical test instruments suitable to measure an
energised supply in the electricity supply environment.
Evidence requirements
1.1
Instruments are selected, and a demonstration provided showing how selected
instruments would be connected to perform the required measurement.
Range
1.2
LV voltage, conductor resistance, conductor insulation resistance.
Consequences of incorrect use of electrical test instruments are described.
Range
use of wrong instrument, incorrect connection to the circuit,
incorrect range or function selected, risk of electric shock, arc
flash.
1.3
The test-before-touch and the prove-test-prove methods for electrical
measurement are explained and demonstrated.
1.4
Industry practice and safety procedure around taking measurements on
energised circuits is explained and demonstrated.
Outcome 2
Demonstrate knowledge of a method used to identify an energised electrical circuit and the
procedures for disconnection and isolation of the energised electrical circuit.
Evidence requirements
2.1
Method of identification of the energised circuit is explained.
2.2
Procedures for carrying out the de-energising of the circuit, safety tagging and
locking off are explained.
Outcome 3
Demonstrate knowledge of the hazardous nature of electricity and methods of how
personal protection is applied to reduce exposure to electrical shock.
Evidence requirements
3.1
The nature of electric shock is explained in terms of how it may arise, its
physiological effect on humans, and the effects of voltage and current on the
human body as described by IEC 60479-1.
3.2
The danger of generated step and touch voltages in the electricity supply
industry is explained.
Electricity Supply Industry Training Organisation
SSB Code 101813
© New Zealand Qualifications Authority 2013
NZQA registered unit standard
28020 version 1
Page 4 of 5
3.3
The danger of working within minimum approach distances is explained.
3.4
The use of double insulation is described in terms of what it is and how it
protects the user from electric shock.
3.5
Method of identification for double insulation from appliance nameplate is
explained.
3.6
The principle of operation of how an isolating transformer can prevent electric
shock is explained.
3.7
The principle of operation of how an RCD can prevent electric shock is
explained.
Outcome 4
Demonstrate knowledge of the use of protection equipment against electric shock in the
electricity supply environment.
Evidence requirements
4.1
Types of RCD devices and typical operating currents are identified.
Range
4.2
may include but is not limited to – portable, socket outlet.
Evidence of two required.
Method of testing portable and socket mounted RCDs is explained and
demonstrated according to current regulations, standards and industry practice.
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
15 August 2013
N/A
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 assessment 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 assessment standards.
Electricity Supply Industry Training Organisation
SSB Code 101813
© New Zealand Qualifications Authority 2013
NZQA registered unit standard
28020 version 1
Page 5 of 5
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against assessment 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 Electricity Supply Industry Training Organisation info@esito.org.nz if
you wish to suggest changes to the content of this unit standard.
Electricity Supply Industry Training Organisation
SSB Code 101813
© New Zealand Qualifications Authority 2013