NZQA registered unit standard 11576 version 5 Page 1 of 5 Title Demonstrate and apply knowledge of building electrical services engineering Level 6 Purpose Credits 15 This unit standard covers the knowledge and application of building electrical services technology requirements for industrial and commercial buildings. People credited with this unit standard are able to: – demonstrate knowledge of building electrical services; – test electrical installations; – demonstrate knowledge of the importance of electrical earthing systems used in buildings; and – demonstrate knowledge of methods used to control the environment and security in buildings. Classification Electrical Engineering > Electrotechnology Available grade Achieved Entry information Recommended skills and knowledge Unit 22721, Demonstrate and apply fundamental knowledge of electrical circuit engineering principles, Unit 22722, Demonstrate and apply introductory knowledge of electrical circuit engineering principles, Unit 22723, Demonstrate and apply intermediate knowledge of the elements of power engineering, Unit 22724, Demonstrate and apply knowledge of electrical machines, and Unit 22726, Demonstrate and apply introductory knowledge of electronic engineering; or demonstrate equivalent knowledge and skills. Explanatory notes 1 This unit standard is intended for use in engineering courses at diploma level. 2 References Building Act 2004; Electricity Act 1992; Electricity (Safety) Regulations 2010; Health and Safety in Employment Act 1992; and all subsequent amendments and replacements. The Skills Organisation SSB Code 100401 New Zealand Qualifications Authority 2016 NZQA registered unit standard 11576 version 5 Page 2 of 5 3 Definitions HRC – high rupturing capacity. Industry practice – practice used and recommended by organisations involved in the electrotechnology industry. MCB – miniature circuit breaker. PVC – polyvinyl chloride. UPS – uninterruptible power supply. XLPE – cross-linked polyethylene. 4 All measurements are to be expressed in Système International (SI) units, and, where required, converted from Imperial units into SI units. 5 All activities must comply with: any policies, procedures, and requirements of the organisations involved; the standards of relevant professional bodies; and any relevant legislative and/or regulatory requirements. 6 Range a performance in relation to the outcomes of this unit standard must comply with the Health and Safety in Employment Act 1992; b laboratory and workshop safety practices are to be observed at all times. Outcomes and evidence requirements Outcome 1 Demonstrate knowledge of building electrical services. Evidence requirements 1.1 Methods of providing electrical reticulation within buildings are described in accordance with industry practice. Range 1.2 Cables for providing electrical reticulation for given building applications are identified and justified in accordance with industry practice based on load, temperature, fault level, and installation method. Range 1.3 mains, submains, radial, ring main and rising main distribution systems. domestic and industrial buildings; current, temperature, voltage drop, short circuit conditions for cables with PVC and XLPE insulation, soil thermal resistivity, installation environment. Fuses, circuit breakers, and monitoring relays for the protection of electrical circuits are identified in accordance with industry practice and the reason for their selection is justified. Range The Skills Organisation SSB Code 100401 construction and operation of HRC fuses, MCB and relays both on overload and short circuit; pre-arcing and arcing time, arcing energy, cut off, let through energy; the effects on the protected circuit. New Zealand Qualifications Authority 2016 NZQA registered unit standard 11576 version 5 Page 3 of 5 Outcome 2 Test electrical installations. Evidence requirements 2.1 Tests are conducted and calculations are performed on symmetrical electrical installations under short circuit fault conditions. Range the percentage and the per unit methods for calculating short circuit fault levels within power systems from 11 kV downwards. Outcome 3 Demonstrate knowledge of the importance of electrical earthing systems used in buildings. Range electrical safety, system protection. Evidence requirements 3.1 Need for and the application of earthing systems is explained with the aid of diagrams, in accordance with the Electricity (Safety) Regulations 2010. 3.2 Earthing systems are identified and compared in terms of application and practicality in accordance with industry practice. Range 3.3 vertically driven earth rods, bare conductors buried in trenches, reinforcing steel in concrete foundations. Methods of measuring the resistance of earthing electrodes and soil resistivity are investigated and detailed in accordance with industry practice. Range tests on earth electrodes and soil types to be conducted using earth resistance testers. Outcome 4 Demonstrate knowledge of methods used to control the environment and security in buildings. Evidence requirements 4.1 Conditions necessary to provide personal comfort for the occupants of buildings are described in accordance with industry practice. Range 4.2 heating, ventilating, air conditioning. The heating load of a building for a given environmental condition is determined in accordance with industry practice. Range The Skills Organisation SSB Code 100401 heat gains, building material losses, temperature range. New Zealand Qualifications Authority 2016 NZQA registered unit standard 4.3 Principles and methods used for efficient energy control in buildings are explained. Range 4.4 New Zealand electricity tariff systems, electronic energy controllers. Principles and methods of providing personal security in buildings are explained in accordance with industry practice. Range 4.5 11576 version 5 Page 4 of 5 fire, entry control, lighting. Principles of providing standby and emergency power supplies in buildings are described in accordance with industry practice. Range generator types, UPS power supplies, hybrid combinations of solar, wind and fossil fuels. 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 24 February 1998 31 December 2013 Revision 2 12 December 2000 31 December 2013 Review 3 18 December 2006 N/A Rollover and Revision 4 15 March 2012 N/A Revision 5 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 The Skills Organisation SSB Code 100401 New Zealand Qualifications Authority 2016 NZQA registered unit standard 11576 version 5 Page 5 of 5 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