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It specifies LV design requirements adopted by Independent Distribution Network Operators (IDNOs), including LV electrical design compliance with relevant operator needs and guidance to be read alongside adopting operator requirements. The standard covers key electrical design parameters, references common requirements, defines LV as 1 kV or less, and addresses impacts from Low Carbon Technologies (LCT).",{"@graph":69,"@context":121},[70,84,104],{"@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":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/ina-low-voltage-design-standard-version-2023-24/664738/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":98,"encodingFormat":97,"isAccessibleForFree":99,"interactionStatistic":100},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/ina-low-voltage-design-standard-version-2023-24/664738.png","ImageObject",300,407,{"name":92,"@type":93},"Oliver","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29",true,{"@type":101,"interactionType":102,"userInteractionCount":8},"InteractionCounter",{"@type":103},"ViewAction",{"@type":105,"mainEntity":106},"FAQPage",[107,113,117],{"name":108,"@type":109,"acceptedAnswer":110},"What is the purpose of the INA Low Voltage Design Standard?","Question",{"text":111,"@type":112},"It provides a standard for designing and planning new Low Voltage (LV) networks for new homes, including LV design criteria adopted by IDNOs.","Answer",{"name":114,"@type":109,"acceptedAnswer":115},"What does the standard cover under its scope?",{"text":116,"@type":112},"It covers design parameters for Low Voltage networks, including common requirements that consider the impacts of Low Carbon Technologies (LCT), and defines LV as 1 kV or less.",{"name":118,"@type":109,"acceptedAnswer":119},"How should changes to the document requirements be handled?",{"text":120,"@type":112},"For changes to the requirements in the document, applications should be made to the Design Authority, the Independent Networks Association Electrical Technical Sub Committee (INA ETSC).","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},664738,1793270631,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":8,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":138,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":128,"read_time":26},8796095461610,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","| TITLE:\u003Cbr>INA Low Voltage Design Standard |  |  | DOCUMENT NO:\u003Cbr>ETSC-DES-001 |  |  |  |\n| --- | --- | --- | --- | --- | --- | --- |\n|  |  |  | Author | Production | Approval | Authorisation |\n| 1 | 1 Sep 2021 | Initial Version | INA | INA | INABoard | INA Board |\n| 2 | 24 April 2023 | Document renamed to‘INA Low Voltage Design Standard’ to be consistent with the website references.\u003Cbr>Section 3: Additions to the references table.\u003Cbr>Section 5: ‘Electrical Design’amended to provide further guidance on cables connected to LV Apparatus.\u003Cbr>Section 5.4 title amended.\u003Cbr>Section 5. 5: ‘Harmonics’amened to provide further guidance on harmonic requirements.\u003Cbr>Section 5.10.2:‘Calculation of Demand’ amended to include Unconstrained Electric Heating.\u003Cbr>Section 5.14: ‘Secondary Supplies’ amended to provide further guidance on secondary supplies and labelling requirements.\u003Cbr>Section [5.18.2.2](5.18.2.2) : ‘For Services Metered in each Flat’ amended to provide further guidance on cable routes and cable separation. | INA | INA | INABoard | INA Board |\n|  |  |  |  |  |  |  |\n\nDate of next review: April 2024  \nCONTENTS  \n1. Purpose .............................................................................................................. 3  \n2. Scope ................................................................................................................. 3  \n3. References ..........................................................................................................4  \n4. Acronyms ............................................................................................................ 5  \n5. Electrical Design .................................................................................................. 5  \n5.1. Maximum Voltage Regulation from LV Busbars of HV/LV Substation ................ 6  \n5.2. Maximum Service Volt Drop.......................................................................... 6  \n5.3. Maximum Voltage Unbalance........................................................................ 6  \n5.4. Maximum Earth Loop Impedance .................................................................. 6  \n5.5. Harmonics .................................................................................................. 6  \n5.6. Phase to Earth Fault Clearance Time ............................................................. 7  \n5.7. Prospective Short Circuit Current (PSCC) at LV Busbars of HV/LV Substation .... 7  \n5.8. Prospective Short Circuit Current (PSCC) at the Cut-Out ................................. 7  \n5.9. Contribution to PSCC from LV Generation and Motors ..................................... 8  \n5.10. Network Load Criteria ................................................................................ 10  \n5.11. LV Interconnection .................................................................................... 14  \n5.12. Maximum Number of Services per Joint ....................................................... 14  \n5.13. LV Supply Arrangements 100A to 1600A ..................................................... 14  \n5.14. Secondary Supplies ................................................................................... 14  \n5.15. Service Entry Requirements........................................................................ 15  \n5.16. Earthing ................................................................................................... 19  \n5.17. LV Cables ................................................................................................. 19  \n5.18. Specification for Supplies to Multi-Occupied Buildings ................................... 20  \n5.19. Unmetered Supplies (UMS) ........................................................................ 23  \n1. Purpose  \nThe purpose of this document is to provide a standard for the design and planning of new Low Voltage ( LV) networks and covers the LV design criteria for electricity networks for new homes to be adopte","cbCaigVJcWW4iL4g","https://ap.wps.com/l/cbCaigVJcWW4iL4g","pdf",387018,24,"English","# Purpose\n# Scope\n# References\n# Acronyms\n# Electrical Design\n## Maximum Voltage Regulation from LV Busbars of HV/LV Substation\n## Maximum Service Volt Drop\n## Maximum Voltage Unbalance\n## Maximum Earth Loop Impedance\n## Harmonics\n## Phase to Earth Fault Clearance Time\n## Prospective Short Circuit Current (PSCC) at LV Busbars of HV/LV Substation\n## Prospective Short Circuit Current (PSCC) at the Cut-Out\n## Contribution to PSCC from LV Generation and Motors\n## Network Load Criteria\n## LV Interconnection\n## Maximum Number of Services per Joint\n## LV Supply Arrangements 100A to 1600A\n## Secondary Supplies\n## Service Entry Requirements\n## Earthing\n## LV Cables\n## Specification for Supplies to Multi-Occupied Buildings\n## Unmetered Supplies (UMS)","[{\"question\":\"What is the purpose of the INA Low Voltage Design Standard?\",\"answer\":\"It provides a standard for designing and planning new Low Voltage (LV) networks for new homes, including LV design criteria adopted by IDNOs.\"},{\"question\":\"What does the standard cover under its scope?\",\"answer\":\"It covers design parameters for Low Voltage networks, including common requirements that consider the impacts of Low Carbon Technologies (LCT), and defines LV as 1 kV or less.\"},{\"question\":\"How should changes to the document requirements be handled?\",\"answer\":\"For changes to the requirements in the document, applications should be made to the Design Authority, the Independent Networks Association Electrical Technical Sub Committee (INA ETSC).\"}]","INA Low Voltage Design Standard - Version - 2023-24 | PDF"]