This unit involves the skills and knowledge required to design electrical installations with a low voltage (LV) demand greater than 400 ampere (A) per phase.

It includes preparing and developing designing schemes for the protection of persons and property, correct functioning, compatibility with the supply and arrangement of circuits. It also includes determination of fault levels, effective switchgear, control gear, and protection against over-current and over and under-voltage and wiring based on calculations to meet required safety and performance standards and functional requirements.

No licensing, legislative or certification requirements apply to this unit at the time of publication.

ELEMENTS

PERFORMANCE CRITERIA

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Prepare to design electrical installations

1.1

Work health and safety (WHS)/occupational health and safety (OHS) processes and workplace procedures for a given work area are identified, obtained and applied

1.2

Scope of the electrical installation is identified from design brief

1.3

Electrical installation safety and regulatory requirements are identified, obtained and applied

1.4

Design development work is planned in consultation with relevant person/s involved with the work to meet scheduled timelines

2

Develop installation design

2.1

Relevant electrical installation performance standards, compliance methods and electrical equipment is applied to installation design in accordance with relevant industry standards

2.2

Alternative installation design/s is developed in accordance with the design brief

2.3

Safety, functional and budgetary considerations are incorporated in installation design

2.4

Installation design draft is checked in accordance with design brief and relevant industry standards

2.5

Installation design is documented for submission to relevant person/s for acceptance and approval

2.6

Unplanned situations are dealt with in accordance with workplace procedures

3

Obtain approval for installation design

3.1

Installation design is documented and presented to client representative and/or relevant person/s

3.2

Requests for alterations to the design are negotiated with relevant person/s in accordance with workplace procedures

3.3

Final design is documented and approval obtained from relevant person/s

3.4

Quality of work is monitored in accordance with workplace procedures and relevant industry standards

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions on at least one occasion and include:

developing outlines of alternative designs

developing the design within the safety and functional requirements and budget limitations

documenting and presenting design effectively

successfully negotiating design alteration requests

obtaining approval for final design

dealing with unplanned events

applying performance standards, compliance methods and lighting equipment to installation design

applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements, including using risk control measures

consulting with relevant person/s in planning design work

identifying the scope of the installation design brief

monitoring quality of work

planning to meet scheduled timelines

preparing to design electrical installations.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

low voltage (LV) electrical installations with a demand greater than 400 ampere (A) per phase and advanced methods of cable and protection selection, including:

electrical installations, determination of demand encompassing:

acceptable methods for determining demand in mains and sub-mains

applying calculation and assessment methods of determining demand in mains and sub-mains

electrical installations, over-current protection encompassing:

application of acceptable methods for determining prospective fault current

relationship between prospective fault current and characteristics of protective devices

relationship between over-current protections at various points in an electrical distribution system

electrical installations, over-voltage and under-voltage protection encompassing:

application of acceptable methods for determining the need for over-voltage and under-voltage protection

methods and devices providing over-voltage and under-voltage protection

problem-solving techniques

relevant manufacturer specifications and operating instructions

relevant job safety assessments or risk mitigation processes

relevant WHS/OHS legislated requirements

relevant workplace documentation

relevant workplace quality, instructions, policies and procedures.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must occur in suitable workplace operational situations where it is appropriate to do so; where this is not appropriate, assessment must occur in simulated suitable workplace operational situations that replicate workplace conditions.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Resources for assessment must include access to:

a range of relevant exercises, case studies and/or simulations

relevant and appropriate materials, tools, facilities and equipment currently used in industry

resources that reflect current industry practices in relation to designing electrical installations with a LV demand greater than 400 A per phase.

applicable documentation, including workplace procedures, equipment specifications, regulations, codes of practice and operation manuals.

Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range is restricted to essential operating conditions and any other variables essential to the work environment.

Non-essential conditions may be found in the UEE Electrotechnology Training Package Companion Volume Implementation Guide.

Designing electrical installations with a LV demand in excess of 400 A per phase switchboard design installation must include at least the following:

main switchboard

multiple tenancies

distribution boards

single and three phase final sub-circuits

Electrotechnology

Electrical