NZQA registered unit standard
14974 version 6
Page 1 of 4
Title
Fabricate and install busbars in electric switchboards
Level
3
Purpose
Credits
20
This unit standard is intended for the training and assessment
of people engaged in the manufacture of electric switchboards
and covers the knowledge and skill required to fabricate and
install busbars to given specifications.
People credited with this unit standard are able to:
–
make single bends in busbars to a plan;
–
achieve specified busbar sets;
–
punch or drill holes in busbars; and
–
install busbars and bracing systems.
Classification
Electrical Engineering > Electric Switchboards
Available grade
Achieved
Explanatory notes
1
This unit standard has been developed for learning and assessment on-job.
2
References
Electricity Act 1992;
Electricity (Safety) Regulations 2010;
Health and Safety in Employment Act 1992 and associated regulations;
Accident Compensation Act 2001;
AS/NZS 3000:2007, Electrical installations (known as the Australian/New Zealand
Wiring Rules), including Amendment 1;
AS/NZS 3439.4:2009, Low-voltage switchgear and control gear assemblies –
Particular requirements for assemblies for construction sites (ACS);
New Zealand Electrical Codes of Practice (NZECP), ISSN 0114-0663 (available from
the Ministry of Business, Innovation and Employment);
and all subsequent amendments and replacements.
3
Definitions
Industry practice – practice used and recommended by organisations involved in the
electrotechnology industry.
Set – a combination of angles, bends, and distances between angles and bends on a
busbar.
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.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
4
14974 version 6
Page 2 of 4
Range
a All activities are to be conducted in accordance with applicable specifications,
documented enterprise, legislative and/or regulatory requirements, and local
bylaws. Activities must also meet the requirements of the above in terms of
personal, product, and work site safety.
b For purposes of this unit standard, busbars are limited to a capacity of 1000 amps.
Outcomes and evidence requirements
Outcome 1
Make single bends in busbars to a plan.
Range
busbars – two of different profile sizes;
bends – one on each busbar, each of 90 degrees maximum;
plan – any one of profile drawing, engineer’s sketch, own sketch.
Evidence requirements
1.1
Bending of busbars is achieved using bending tools in a safe manner.
1.2
Bending of busbars to the required angle is achieved without loss of mechanical
or electrical integrity.
1.3
Busbar bending radii are consistent and show efficient use of materials and are
in accordance with industry practice.
Outcome 2
Achieve specified busbar sets.
Range
two angles, and one distance between angles, on each of two busbars.
Evidence requirements
2.1
Busbars are bent to specified sets in accordance with industry practice.
2.2
Accurate bending of busbars is demonstrated by close nesting of the two
busbars on first attempt.
Outcome 3
Punch or drill holes in busbars.
Evidence requirements
3.1
Holes are either punched or drilled in busbars consistent with requirements of
the drawing.
Range
3.2
requirements – diameter, position.
Busbar holes are created in a consistent and safe manner.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
3.3
14974 version 6
Page 3 of 4
Edges of holes are reamed to remove all burrs in accordance with industry
practice.
Outcome 4
Install busbars and bracing systems.
Evidence requirements
4.1
Busbar support systems are installed according to specification.
4.2
Busbars are positioned to achieve specified clearances and creepage distance.
4.3
Busbars are jointed to meet specification in accordance with industry practice.
4.4
Phase rotation and colour coding of busbars complies with drawing
specifications.
4.5
Busbars are installed in accordance with electromagnetic field requirements.
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.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
14974 version 6
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 Skills Organisation 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