Electrical Installations: Standard for Schools

1 Ministry of Education Electrical Installations: Standard for Schools Version 2 CONTENTS Table of contents CONTENTS .. 2 FOREWORD .. 9 1. USING THIS DOCUMENT .. 11 Interpretation of this document .. 11 Application of this document .. 11 Definitions and abbreviations .. 13 2. Electrical SYSTEMS: 15 Electrical systems background .. 15 Electrical infrastructure .. 15 General design 16 3. GENERAL CONDITIONS .. 17 Ministry Electrical requirements .. 17 Ministry Electrical 18 Standards and references .. 18 Responsibility of Electrical contractors.

2 19 Security clearance and Police vetting .. 19 Occupational Health and Safety (OSH) .. 19 Advice .. 20 Site conditions .. 20 Contractual obligations .. 21 Installer qualification .. 21 Existing sites floor plans .. 21 Design by the electrician .. 22 Equipment locations .. 22 Contract drawings .. 22 Fit for 22 Replacement of existing fixtures, fittings or accessories .. 23 Requirement for inspection .. 23 Final design approval .. 23 Computer Aided Design (CAD) drawings .. 23 Shop drawings .. 23 Time elapsed .. 24 Construction documentation .. 24 Coordination with other services.

3 25 Out of hours work .. 25 Site reinstatement .. 25 Cleaning .. 25 Removal of redundant materials .. 26 Practical completion .. 26 Audits and inspections .. 26 As-built drawings .. 26 Warranties .. 27 3 Records and retention .. 28 Intellectual property .. 28 Confidentiality .. 28 Training .. 28 4. DESIGN 29 Criteria for use .. 29 Alternative supply arrangements .. 29 Necessity of installation .. 29 Associated systems and components new installation .. 29 Design exclusions .. 30 Aesthetic design .. 30 ICT infrastructure .. 31 Dimensioning .. 31 Salt spray and corrosive environments.

4 31 Chemical corrosion .. 31 Noise .. 32 Pre-existing cabling .. 32 External building 33 Fire rating .. 33 Electromagnetic compatibility .. 33 5. PATHWAYS AND SPACES .. 34 Pathways and spaces General requirements .. 34 Cable support systems .. 34 Conduits .. 34 Backfilling and reinstatement .. 35 Route identification .. 35 6. CABLING .. 36 General requirements .. 36 Terminations .. 36 Cable support system .. 36 Access to other services .. 36 7. EQUIPMENT SPACES .. 37 General requirements .. 37 Equipment spaces Protective devices .. 37 Labelling.

5 37 8. WORK AREAS (WA) .. 38 General requirements .. 38 9. GENERAL ARRANGEMENT, CONTROL AND PROTECTION .. 39 Electrical installation General requirements .. 39 Guidance for installation of 10mA RCD protection in Schools .. 39 Electrical installation Protective devices .. 40 Electrical products and equipment .. 41 Electrical cable segregation .. 41 4 Switchboards General requirements .. 41 Switchboard wiring .. 41 Switchboards - New .. 45 10. SELECTION AND installation OF WIRING SYSTEMS .. 47 Selection and installation of wiring systems General requirements .

6 47 Flush boxes and plates .. 47 Switches, socket outlets and fixed outlets .. 47 Fixed wiring outlets .. 49 GPOs and RUPOs .. 49 11. LUMINAIRES .. 50 Luminaries Overview .. 50 Luminaries Design and installation .. 50 Luminaries General requirements .. 50 Lighting dimmers .. 51 Recessed luminaries .. 51 Surface mounted luminaries .. 51 Chain suspended luminaries .. 51 Fluorescent lighting .. 52 Exterior site lighting .. 52 Emergency lighting .. 52 12. SELECTION AND installation OF APPLIANCES AND ACCESSORIES 54 Appliances and accessories General requirements .

7 54 Appliances and accessories - Connections .. 54 Hand driers .. 55 Heat trace systems .. 55 Sanitary disposal units .. 55 Storage water heaters .. 55 Under bench water heaters .. 56 Water 56 Fire alarm transmitter device (LTX) .. 56 Fire indicator panel (FIP) .. 56 Panel 56 Infrared heaters .. 56 Storage heaters .. 57 Window actuators .. 57 13. EARTHING AND TRANSIENT PROTECTION .. 58 Earthing and transient protection General requirements .. 58 Earthing .. 58 Bonding of other services and metal work .. 58 Communications Cabinets: .. 58 Metallic Cable Pathways.

8 58 Protective earthing conductors .. 58 Equipotential bonding .. 59 ICT earthing .. 60 Surge protection .. 60 5 14. DAMP SITUATIONS .. 61 Damp situations General .. 61 Damp 61 Switches, sockets outlets, and fixed outlets .. 61 Luminaires .. 61 15. SPECIAL Electrical INSTALLATIONS .. 62 Special Electrical installations General .. 62 Photovoltaic (PV) installations .. 62 Electro medical installations .. 62 16. Electrical installation requirements IN THE NEW ZEALAND BUILDING CODE .. 63 New Zealand Building Code General requirements .. 63 Building penetrations.

9 63 Drilling of structural members .. 63 17. TESTING, VERIFICATION, CERTIFICATION AND DOCUMENTATION .. 65 Testing and verification, certification, and documentation .. 65 RCDs .. 65 RCD Distribution board test schedule .. 65 Warranty certification .. 66 Light level measurements .. 67 Commissioning procedures .. 67 Acceptance .. 68 Appendices APPENDIX A HERITAGE SITES .. 69 APPENDIX B APPROVED ICT CONTRATORS LIST .. 71 APPENDIX C LABELLING 72 Tables Table 1: Acceptable sound levels .. 32 REFERENCED DOCUMENTS Reference is made in this document to the following: NEW ZEALAND REGULATIONS Electricity (Safety) Regulations Electricity (Safety) Regulations 2010 New Zealand Building Code Compliance document for New Zealand Building Code Clause C Protection from Fire (including amendments 2 and 3) Compliance document for New Zealand Building Code Clause E2 External Moisture (Third edition, including amendment 6) Compliance document for New Zealand Building Code Clause G9 Electricity (including amendment 6) NEW ZEALAND STANDARDS NZS 3604.

10 2011 Timber framed buildings NZS 4121:2001 Design for access and mobility: Buildings and associated facilities NZS 4219:2009 Seismic performance of engineering systems NZS :2007 Energy efficiency - Large buildings - Lighting NZS 6115:2006 including Amendment 2 Electrical installations - Mobile medical facilities NZS 6801:2008 Acoustics - Measurement of environmental sound NZS 6802:2008 Acoustics - Environmental noise JOINT AUSTRALIAN/NEW ZEALAND STANDARDS AS/NZS ISO :2004 Acoustics Rating of sound insulation in buildings and of building elements-airborne sound insulation AS/NZS :2006 Interior and workplace lighting - Part 1: General principles and recommendations AS/NZS :1997 including Amendment 1 Interior lighting - Part : Industrial tasks and processes AS/NZS 2107:2000 Acoustics Recommended design sound levels and reverberation times for building interiors AS/NZS 3000:2007 including Amendment 3 Electrical installations (known as the Australian/New Zealand Wiring Rules) AS/NZS 3123:2005 Approval and test specification - Plugs, socket-outlets and couplers for general industrial application AS/NZS.