NZQA registered unit standard
14970 version 6
Page 1 of 4
Title
Demonstrate knowledge of electric switchboard components and
their representation on drawings
Level
3
Purpose
Credits
30
This unit standard is intended for the training and assessment
of people engaged in the manufacture of electric switchboards
and covers a general knowledge of switchboard components
and how they are represented on drawings.
People credited with this unit standard are able to:
–
demonstrate knowledge of switchgear components;
–
demonstrate knowledge of cable types;
–
demonstrate knowledge of busbars and busbar coatings;
–
describe busbar jointing methods;
–
demonstrate knowledge of electric switchboard drawings;
and
–
interpret switchgear symbols and variables.
Classification
Electrical Engineering > Electric Switchboards
Available grade
Achieved
Explanatory notes
1
This unit standard has been developed for learning and assessment on-job;
2
Reference
AS/NZS 3439.4:2009, Low-voltage switchgear and control gear assemblies –
Particular requirements for assemblies for construction sites (ACS);
and all subsequent amendments and replacements.
3
Definitions
GA – general assembly.
Industry practice – practice used and recommended by organisations involved in the
electrotechnology industry.
PVC – polyvinyl chloride.
Switchboard – low-voltage switchgear and control gear assemblies, the rated voltage
of which does not exceed 1000 V a.c. at frequencies not exceeding 1000 Hz, or 1500
V d.c.
Symbols and components – items commonly used in switchboard manufacture and
interfacing equipment. For assessment purposes candidates need to demonstrate
competence with the types of drawings and symbols used in their particular
workplace.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
4
14970 version 6
Page 2 of 4
Range
All knowledge demonstrated is to be in accordance with applicable specifications,
documented enterprise, legislative and/or regulatory requirements, and local bylaws.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of switchgear components.
Range
a minimum of 20 components, excluding cables and busbars, provided by the
assessor.
Evidence requirements
1.1
Components are identified by name and their function on a switchboard
assembly is described.
1.2
Possible variables for components are stated with reference to the means of
unique component identification.
1.3
Special component mounting provisions are identified and described.
1.4
Circuit connection points on components are located with an explanation of any
required polarities.
Outcome 2
Demonstrate knowledge of cable types.
Range
cable types may include but are not limited to – flexible, conduit, PVC insulated,
cross linked, screened, aluminium.
Evidence of seven is required.
Evidence requirements
2.1
Cable types are identified on sight.
2.2
Typical uses for cable types are described with reference to typical applications.
2.3
Colour coding is explained according to current and applicable industry
standards and codes.
Outcome 3
Demonstrate knowledge of busbars and busbar coatings.
Evidence requirements
3.1
Busbars are identified by size, rating, and shape to match job specifications.
Range
The Skills Organisation
SSB Code 100401
rating – voltage, current, fault.
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.2
Busbar coatings are identified on sight.
Range
3.3
14970 version 6
Page 3 of 4
coatings – uncoated, electro-tin, PVC.
A typical use of each type of coating is stated in accordance with industry
practice.
Range
coatings – uncoated, electro-tin, PVC.
Outcome 4
Describe busbar jointing methods.
Evidence requirements
4.1
Methods of jointing busbars with reference to surface preparation, assembly
technique, maintenance of electrical properties, and jointing of dissimilar metals
are described.
4.2
Busbar jointing requirements in terms of number, positioning, and type are
identified and described.
Outcome 5
Demonstrate knowledge of electric switchboard drawings.
Evidence requirements
5.1
Unique features and the purpose of each type of diagram are explained with
reference to a particular application.
Range
5.2
diagrams – GA, schematic, single line, busbar layout.
Specific details are identified in each of a set of diagrams for a particular
switchboard.
Range
set of diagrams – GA, schematic, single line;
detail – at least five component details, each of which is shown on
each of the three diagram types.
Outcome 6
Interpret switchgear symbols and variables.
Range
symbols – minimum of 20 commonly used symbols selected by the assessor;
variables may include but are not limited to – current rating, capacity, number of
poles.
Evidence of at least two variables for each symbol is required.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
14970 version 6
Page 4 of 4
Evidence requirements
6.1
Switchgear components and variables are uniquely identified from their
symbolic representation in accordance with industry practice.
6.2
Symbols are sketched for switchgear components described by the assessor in
a manner that enables clear recognition and provides details on variables.
Planned review date
31 December 2014
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
31 August 1998
31 December 2013
Revision
2
3 April 2001
31 December 2013
Revision
3
12 March 2002
31 December 2013
Review
4
20 March 2008
N/A
Rollover and
Revision
5
15 March 2012
N/A
Revision
6
15 January 2014
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 (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 Skills Organisation to reviewcomments@skills.org.nz if you wish to
suggest changes to the content of this unit standard.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016