NZQA Expiring unit standard
25141 version 2
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Title
Describe control systems, pump starters, and electricity, for
irrigation systems
Level
4
Credits
Purpose
10
This unit standard is for people who design irrigation systems.
People credited with this unit standard are able to: describe
systems and pump starters for irrigation design; and
demonstrate knowledge of compliance requirements of
electrical installation and maintenance, and the use of
electricity for irrigation systems.
Classification
Water Industry > Irrigation
Available grade
Achieved
Explanatory notes
1
Legislation relevant to this unit standard includes but is not limited to the Health and
Safety in Employment Act 1992.
2
Reference
The INZ Irrigation Design Code of Practice and Irrigation Design Standards, referred
to as the Irrigation Design Code of Practice is available from Irrigation New Zealand,
http://www.irrigationnz.co.nz/media/CoP.pdf.
3
Credit for this unit standard does not qualify the candidate to work in a drainlaying
situation that comes under the drainlayers licence requirements issued under the
Plumber, Gasfitters, and Drainlayers Act 2006 and any subsequent amendments.
This unit standard is
expiring
Outcomes and evidence requirements
Outcome 1
Describe systems and pump starters for irrigation design.
Evidence requirements
1.1
Control systems are described in terms of their advantages and disadvantages.
Range
1.2
control systems include but are not limited to – automatic, manual.
Irrigation systems are described in terms of the levels of control required.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
Range
1.3
25141 version 2
Page 2 of 3
stand alone, central controlled, remote controlled, manual,
feedback.
Irrigation pump starters are described in terms of their advantages and
disadvantages.
Range
includes but is not limited to – variable speed drive (VSD), soft
start (SS), direct on line (DOL), star delta.
Outcome 2
Demonstrate knowledge of compliance requirements of electrical installation and
maintenance, and the use of electricity for irrigation systems.
Evidence requirements
2.1
Electrical installation and maintenance work is described in terms of the
regulatory requirements relating to contractor registration, and certificates of
compliance.
2.2
Electricity is described in terms of source, and way it functions.
Range
2.3
source – mains supply, generator, battery, solar;
functions – direct current (DC), alternating current (AC);
static electricity, single phase, 3 phase, power factor, voltage,
frequency.
Electrical components are described in terms of their features and uses in the
irrigation system.
Range
components – switches, cables, solenoid, circuit breakers, fuses,
transformers.
This unit standard is
Range
current (I), expiring
voltage (V), power (P), resistance (R).
2.4
Electrical terms are described.
2.5
Wire size for solenoid valves is calculated to meet control requirements for an
irrigation system.
Range
2.6
Grounding and surge protection requirements are described for equipment
protection.
Range
2.7
AC and DC, controllers, single solenoids, multiple solenoids.
lightning, electrical supply fluctuations.
Electrical safety is described for fixed and moving irrigation outlets and controls.
Range
low voltage, single phase, three phase;
safety issues – isolation, circuits, shorting, electrocution.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
25141 version 2
Page 3 of 3
Replacement information
This unit standard and unit standards 25139, 25140,
25135, 20956 have been replaced by unit standard
28932
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
17 October 2008
31 December 2020
Review
2
20 August 2015
31 December 2020
Consent and Moderation Requirements (CMR) reference
0179
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.
This unit standard is
expiring
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.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016