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The 2025 edition outlines general safety duties and workmanship standards, circuit categorization and arrangement rules, current demand calculation, isolation and switching provisions, and requirements for protective devices including overcurrent and neutral-conductor protection. It also covers earthing, bonding, conductor selection, wiring enclosures, adverse conditions, overhead line installations, labeling notices, alterations, inspections, certification procedures, and record-keeping.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/code-of-practice-for-the-electricity-wiring-regulations-2025-edition/440079/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/code-of-practice-for-the-electricity-wiring-regulations-2025-edition/440079.png","ImageObject",300,407,{"name":92,"@type":93},"Emma Wilson","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-02","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":56},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What topics are covered in Part I of the 2025 edition?","Question",{"text":112,"@type":113},"Part I includes introduction, interpretation, application, general safety requirements, and guidance on circuit categories, arrangement, current demand, isolation and switching, and protective devices.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the code treat earthing, bonding, and earth fault protection?",{"text":117,"@type":113},"It specifies requirements for earth leakage and earth fault currents, protective conductors, main and supplementary bonding, main earthing terminal, earthing conductors, earth fault loop impedance, residual current devices, and earthing of exposed conductive parts.",{"name":119,"@type":110,"acceptedAnswer":120},"What compliance steps are described for inspection, testing, certification, and records?",{"text":121,"@type":113},"The code sets out first inspection, testing and certification, periodic inspection and testing, detailed procedures for inspection/testing, and requirements for making and keeping records, including owner and registered contractor responsibilities.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},440079,1791256515,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":56,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145,"preview_page_count":4},3848291630094,"https://eur-avatar.wpscdn.com/davatar_085a072bc5b1113ac321206ff7593b45","CODE OF PRACTICE FOR THE  \nELECTRICITY (WIRING) REGULATIONS  \nElectrical and Mechanical Services Department 2025 Edition  \n(First Print)  \n2  \nContents  \nPage  \nAcknowledgements 11  \nPart I  \n1. Introduction 12  \n2. Interpretation 13  \n3. Application 19  \n3A General Application of the CoP 20  \n3B Application to Category 2 Circuit 20  \n3C Exempted Fixed Electrical Installations 20  \n4. General Safety Requirements 21  \n4A General 22  \n4B Workmanship and Materials 23  \n4C Design, Construction, Installation and Protection 24  \n4D Identification, Maintenance, Inspection and Testing 25  \n4E Working Space 27  \n4F Switchroom/Substation 28  \n4G Safety Precautions for Work on Low Voltage Installation 29  \n4H Safety Precautions for Work on High Voltage Installation 32  \n4I General Safety Practices 39  \n5. Segregation of Circuit Categories 43  \n5A Circuit Category 44  \n5B Segregation of Category 1, 2 and 3 Circuits 45  \n5C Segregation of Category 4 Circuits and Circuits of Other Categories 46  \n5D Segregation of Circuits from Overhead Telecommunication Lines and Telephone Lines 47  \n6. Circuit Arrangement 49  \n6A Division of Installation into Circuits 50  \n6B Basic Requirements of Circuits 50  \n6C Ring Final Circuit Arrangement 53  \nPage  \n6D Final Circuits Using 5A or 15A Socket Outlets to BS 546 53  \n6E Final Circuits Using 13A Socket Outlets to BS 1363 53  \n6F Final Circuits Using Universal Serial Bus (USB) Outlets to  \nIEC 62368-1 54  \n6G Final Circuits Using 16A Industrial Socket Outlets to IEC  \n60309 55  \n6H Final Circuits Using 32A, 63A or 125A Industrial Socket  \nOutlets to IEC 60309 55  \n6I Protection Requirement of High Voltage Circuit 56  \n7. Current Demand 62  \n7A Current Demand of a Circuit 63  \n7B Determination of Current Demand 63  \n8. Isolation and Switching 68  \n8A Provision of Isolation and Switching 69  \n8B Requirements of Isolation and Switching Devices 73  \n9. Overcurrent Protective Devices 77  \n9A General Requirements 78  \n9B Relation Between Circuit Conductors and Overcurrent  \nProtective Devices 79  \n9C Breaking Capacity of Overcurrent Protective Devices 80  \n9D Position of Overcurrent Protective Devices 81  \n9E Other Requirements of Overcurrent Protective Devices 82  \n10. Neutral Conductor Protective Devices, Isolators and Switches 85  \n10A Linked Circuit Breakers, Linked Isolators and Linked Switches 86  \n10B Protection of Neutral Conductor 86  \n10C Single-pole Switch in Earthing Conductor 86  \n11. Earth Leakage and Earth Fault Currents 87  \n11A General 88  \n11B Basic Requirements 88  \n11C Protective Conductors 89  \n11D Earthing of Exposed Conductive Parts 91  \nPage  \n11E Main Equipotential Bonding 92  \n11F Supplementary Bonding 94  \n11G Main Earthing Terminal 95  \n11H Earthing Conductors 96  \n11I Earth Fault Loop Impedance (Zs) 97  \n11J Residual Current Devices 97  \n11K Earth Electrodes 99  \n12. Earthing Arrangement 109 12A General 110 12B Bonding Connections to the Point of Supply 110 12C Earth Electrode 111  \n13. Conductors, Joints and Connections 113 13A Selection and Sizing of Cable Conductors 114 13B Basic Protection 116 13C Joints and Connections 117 13D Other Requirements of Cables 118  \n14. Wiring Installation Enclosure 121 14A General Requirements 122 14B Steel Conduit System 123 14C Steel Trunking System 123 14D Plastic or PVC Conduit or Trunking 124 14E Cable Capacity of Enclosures 125 14F Enclosures of Busbar Trunking System and Powertrack System 126 14G Workmanship 126  \n15. Adverse Conditions Installation 130 15A Presence of Water (AD) or High Humidity (AB) 131 15B Ambient Temperature (AA) 132 15C Presence of Corrosive or Polluting Substance (AF) 134 15D Installation Exposed to Fire or Explosion 135 15E Impact (AG) 136 15F Vibration (AH) 137  \nPage  \n15G Other Mechanical Stresses (AJ) 137  \n16. Overhead Line Installations 143  \n16A General 144  \n16B Installation of Overhead Lines 144  \n16C Joints of Overhead Lines 144  \n16D Service to Building 144  \n16E Conductor to Ground Clearance 144  \n16F Pole","cbCaiq96MBqIMFgN","https://ap.wps.com/l/cbCaiq96MBqIMFgN","pdf",10581124,402,"English","# Part I\n## Introduction\n## Interpretation\n## Application\n## General Safety Requirements\n## Segregation of Circuit Categories\n## Circuit Arrangement\n## Current Demand\n## Isolation and Switching\n## Overcurrent Protective Devices\n## Neutral Conductor Protective Devices, Isolators and Switches\n## Earth Leakage and Earth Fault Currents\n## Earthing Arrangement\n## Conductors, Joints and Connections\n## Wiring Installation Enclosure\n## Adverse Conditions Installation\n## Overhead Line Installations\n## Display of Labels and Notices\n## Alterations and Additions\n## First Inspection, Testing and Certification\n## Periodic Inspection, Testing and Certification\n## Procedures for Inspection, Testing and Certification\n## Making and Keeping of Records","[{\"question\":\"What topics are covered in Part I of the 2025 edition?\",\"answer\":\"Part I includes introduction, interpretation, application, general safety requirements, and guidance on circuit categories, arrangement, current demand, isolation and switching, and protective devices.\"},{\"question\":\"How does the code treat earthing, bonding, and earth fault protection?\",\"answer\":\"It specifies requirements for earth leakage and earth fault currents, protective conductors, main and supplementary bonding, main earthing terminal, earthing conductors, earth fault loop impedance, residual current devices, and earthing of exposed conductive parts.\"},{\"question\":\"What compliance steps are described for inspection, testing, certification, and records?\",\"answer\":\"The code sets out first inspection, testing and certification, periodic inspection and testing, detailed procedures for inspection/testing, and requirements for making and keeping records, including owner and registered contractor responsibilities.\"}]","CODE OF PRACTICE FOR THE ELECTRICITY (WIRING) REGULATIONS - 2025 Edition | PDF",1790691025,1013]