Transcription
Ministry of EducationElectrical Installations: Standardfor SchoolsVersion 1.6 – October 2015
CONTENTSTable of contentsCONTENTS . 2FOREWORD. 111.1The goal of this document . 111.2Changes from previous version . 112USING THIS DOCUMENT . 132.1Interpretation of this document . 132.1.1Interpretation. 132.1.2Scope of this document . 132.1.3Criteria for use . 132.2Application of this document. 132.2.1Regulations, codes, and Standards. 132.2.2Installation specific standards and requirements . 142.2.3Variation from this document . 142.2.4Conflicts . 142.3Definitions and abbreviations . 152.3.1Definitions . 152.3.2Abbreviations . 163ELECTRICAL SYSTEMS: OVERVIEW . 173.1Electrical systems background . 173.2Electrical infrastructure . 173.3General design requirements . 184GENERAL CONDITIONS . 194.1Ministry electrical requirements . 194.2Ministry electrical installations . 204.3Standards and references . 214.4Responsibility of electrical contractors . 214.5Security clearance and Police vetting . 214.6Occupational Health and Safety (OSH) . 224.7Advice . 224.8Site conditions . 234.9Contractual obligations . 234.10Existing sites floor plans . 234.11Design by the electrician . 23
4.12Equipment locations . 244.13Contract drawings . 244.14Fit for purpose. 244.15Replacement of existing fixtures, fittings or accessories . 254.16Requirement for inspection . 254.17Final design approval . 254.18Computer Aided Design (CAD) drawings . 254.19Shop drawings . 254.20Time elapsed . 264.21Construction documentation . 264.22Coordination with other services . 274.23Out of hours work . 274.24Site reinstatement . 284.25Cleaning. 284.26Removal of redundant materials. 284.27Practical completion . 284.28Audits and inspections . 284.29As-built drawings . 294.30Warranties . 294.30.1Installation warranty . 304.30.2Systems and components warranty . 304.30.3Product warranty. 304.31Records and retention . 304.32Intellectual property . 304.33Confidentiality . 314.34Training . 315DESIGN CRITERIA . 325.1Criteria for use . 325.2Alternative supply arrangements . 325.3Necessity of installation . 325.4Associated systems and components – new installation . 325.5Design exclusions . 335.5.15.6Existing cabling . 33Aesthetic design . 335.6.1Heritage buildings . 335.6.2Exposed cabling . 335.7ICT infrastructure . 345.8Dimensioning . 34
5.9Salt spray and corrosive environments . 345.10Chemical corrosion . 345.10.1Utility rooms . 345.10.2Storage areas . 345.10.3Damp zones . 345.11Noise . 355.12Pre-existing cabling . 365.12.1Cable removal. 365.13External building penetrations . 365.14Fire rating. 365.15Electromagnetic compatibility . 376PATHWAYS AND SPACES . 376.1Pathways and spaces – General requirements. 376.2Cable support systems . 376.2.16.3Cable Tray and Ladder Systems . 38Conduits. 386.3.1Flexible conduit . 386.3.2Embedded conduit . 386.4Backfilling and reinstatement. 386.5Route identification . 397CABLING . 407.1General requirements . 407.2Terminations . 407.3Cable support system . 407.4Access to other services . 408EQUIPMENT SPACES . 418.1General requirements . 418.2Equipment spaces – Protective devices . 418.3Labelling . 419WORK AREAS (WA) . 429.110General requirements . 42GENERAL ARRANGEMENT, CONTROL AND PROTECTION . 4310.1Electrical installation – General requirements . 4310.2Requirement for RCD’s in all schools . 4310.3Guidance for installation of 10mA RCD protection in schools . 4310.3.1Types of schools covered by 10mA RCD requirements. 4310.3.2Areas in schools that require 10mA RCD protection . 43
10.4Electrical installation – Protective devices . 4410.5Electrical products and equipment . 4510.6Electrical cable segregation . 4510.7Switchboards – General requirements . 4510.8Switchboard wiring . 4510.8.1Busbars . 4610.8.2Switchboard Diagrams . 4610.8.3Protective device – circuit ways . 4610.8.4Circuit identification charts . 4610.8.5Equipment layout . 4710.8.6Equipment mountings . 4710.8.7ICT specific wall mounted cabinet protection requirements . 4710.8.8ICT specific free standing cabinet requirements . 4710.8.9Connections . 4710.8.10Installation main switch . 4810.8.11Construction details . 4810.8.12Sub-distribution boards . 4810.8.13Flush mounted panels . 4910.8.14Finish . 4910.9Switchboards - New . 4910.9.1Manufacture . 4910.9.2Design criteria . 5011Selection and installation of wiring systems . 5111.1Selection and installation of wiring systems – General requirements . 5111.2Flush boxes and plates . 5111.2.111.3Fixings . 51Switches, socket outlets and fixed outlets . 5111.3.1General . 5111.3.2Surface Type . 5211.3.3Damp/External Requirements . 5211.3.4Light Switches. 5211.3.5Socket Outlets . 5211.3.6Industrial Outlets . 5211.4Fixed wiring outlets . 5311.5GPOs and RUPOs . 5312LUMINAIRES . 5412.1Luminaries – Overview . 5412.2Luminaries – Design and installation . 54
12.3Luminaries – General requirements . 5412.3.1Power Factor Correction . 5412.3.2Damp situations . 5412.4Lighting dimmers . 5512.5Recessed luminaries . 5512.6Surface mounted luminaries . 5512.7Chain suspended luminaries . 5512.8Fluorescent lighting . 5612.8.112.9Fluorescent lamp accessories . 56Exterior site lighting . 5612.9.1Control switch . 5612.9.2Installation of lighting columns . 5612.10 Emergency lighting . 5612.10.1Self contained single point systems . 5712.10.2Testing Facility . 5713 SELECTION AND INSTALLATION OF APPLIANCES ANDACCESSORIES . 5813.1Appliances and accessories – General requirements . 5813.2Appliances and accessories - Connections . 5813.2.1Terminations . 5813.2.2Domestic Appliances . 5813.3Hand driers . 5913.4Heat trace systems . 5913.4.1Waste Pipe Installations . 5913.4.2Condensate Pipe Lines . 5913.5Sanitary disposal units . 5913.6Storage water heaters . 5913.7Under bench water heaters . 6013.8Water misers. 6013.9Fire alarm transmitter device (LTX) . 6013.10 Fire indicator panel (FIP) . 6013.11 Panel heaters. 6013.12 Infrared heaters . 6013.13 Storage heaters . 6113.13.1Fan controlled output type . 6113.13.2Fixed output type . 6113.13.3Connections . 6113.14 Window actuators . 61
14EARTHING AND TRANSIENT PROTECTION . 6214.1Earthing and transient protection – General requirements . 6214.2Earthing . 6214.3Bonding of other services and metal work . 6214.4Communications Cabinets: . 6214.5Metallic Cable Pathways: . 6214.6Protective earthing conductors . 6214.7Equipotential bonding . 6314.8ICT earthing . 6414.9Surge protection . 6415DAMP SITUATIONS . 6515.1Damp situations – General . 6515.2Damp zones. 6515.3Switches, sockets outlets, and fixed outlets . 6515.4Luminaires . 6516SPECIAL ELECTRICAL INSTALLATIONS . 6616.1Special electrical installations – General . 6616.2Photovoltaic (PV) installations . 6616.3Electro medical installations . 6617 Electrical installation requirements in the New ZealandBuilding Code . 6717.1New Zealand Building Code – General requirements . 6717.2Building penetrations .
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 3439.1
