EDS LV WAVEFORM MAINS CABLE RATINGS
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1 Document Number: EDS Network(s): Summary: ENGINEERING DESIGN STANDARD EDS LV WAVEFORM MAINS CABLE RATINGS EPN, LPN, SPN This standard details the technical and practical information required for the safe and effective installation and use of all LV waveform main cables. Author: Jesse Garcia Approver: Paul Williams Date: 31/07/2018 This document forms part of the Company's Integrated Business System and its requirements are mandatory throughout UK Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset Management. If you have any queries about this document please contact the author or owner of the current version. Circulation UK Power Networks External Asset Management UK Power Networks Services Capital Programme Contractors Connections ICPs/IDNOs Health & Safety Meter Operators Legal G81 Website Network Operations Procurement Strategy & Regulation Technical Training THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
2 Revision Record Version 3.0 Review Date 31/07/2023 Date 10/07/2018 Author Jesse Garcia Reason for update: Periodic review What has changed: No content changes Version 2.1 Review Date 22/07/2018 Date 04/09/2015 Author Paul Williams Reason for update: Typo correction What has changed: Typo correction on tables A.6.1 and A.6.2 from mva to kva. Version 2.0 Review Date 22/07/2018 Date 01/06/2015 Author Paul Williams Reason for update: Periodic review and update. What has changed: Sections 2, 3, 4 and Appendices updated to include Cable datasheet and ratings for 300mm 2 copper Waveform cables. Version 1.0 Review Date 09/09/2015 Date 03/07/2012 Author Michael Sinclair Original Issue UK Power Networks 2015 All rights reserved 2 of 11
3 Contents 1 Introduction Scope Details Current Rating Table for LV Waveform Cables Ratings Ratings Technical Datasheets... 5 Appendix A Typical LV Cable Ratings... 6 A.1 Single Circuit Laid Direct... 6 A.2 Double Circuit Laid Direct... 7 A.3 Three Circuits Laid Direct... 8 A.4 Single Circuit Ducted... 9 A.5 Double Circuit Ducted A.6 Triple Circuit Ducted UK Power Networks 2015 All rights reserved 3 of 11
4 1 Introduction This standard provides designers, installers and operators with the necessary technical and practical information required to enable the safe and efficient installation of LV Waveform mains cables within UK Power Networks. 2 Scope This document covers the following LV Waveform cables laid direct, ducted and in air ducts: 95mm 2 aluminium Waveform (copper neutral earth conductor); 185mm 2 aluminium Waveform (copper neutral earth conductor); 300mm 2 aluminium Waveform (copper neutral earth conductor); 300mm 2 copper Waveform (copper neutral earth conductor). 3 Details 3.1 Current Rating Table for LV Waveform Cables The following tables provide a guide to the current ratings for Waveform cables. All the ratings quoted are Ratings for one single cable only and are in accordance with Engineering Recommendation P17. The MVA ratings are for a three-phase supply. Ratings for multiple cable circuits should be calculated individually.appendix A of this document provides ratings for the more commonly used types of installation: Ratings Conductor Size mm² 95 Al 185 Al 300 Al 300 Cu Current Rating per Cable Based on a depth of cover Laid direct in ground Installed in ducts Installed in Free air (Shaded from Solar Radiation) Ambient air temperature 25 o C Amps kva Amps kva Amps kva Ratings Conductor Size mm² 95 Al 185 Al 300 Al 300 Cu Current Rating per Cable Based on a depth of cover Laid direct in ground Installed in ducts Installed in Free air (Shaded from Solar Radiation) Ambient air temperature 10 o C Amps kva Amps kva Amps kva UK Power Networks 2015 All rights reserved 4 of 11
5 4 Technical Datasheets 1 Solid aluminium or stranded copper conductor 2 XLPE insulation 3 Rubber anti-corrosion layer 4 Copper Waveform wires 5 PVC sheath 600/1000 volt Extruded XLPE insulation 3 core sector shaped Solid aluminium or stranded copper conductors Plain copper waveform cables To BS7870 Section 3.40 Description Unit Values Nominal cross-sectional area mm² 95 Al 185 Al 300 Al 300 Cu Minimum average thickness of insulation mm Concentric neutral/earth conductor: Number of wires Nominal diameter of wires Minimum average thickness of oversheath mm Approximate diameter overall mm Approximate cable weight kg/m Maximum DC resistance of phase 20 C /km Maximum DC resistance of neutral/earth 20 C /km Maximum AC resistance of 90 C /km Approximate 50Hz /km Approximate volt drop mv/a/m Zero Phase Sequence Resistance /km Zero Phase Sequence Reactance /km Minimum bending radius mm Minimum internal diameter of ducts mm mm UK Power Networks 2015 All rights reserved 5 of 11
6 Appendix A Typical LV Cable Ratings A.1 Single Circuit Laid Direct A.1.1 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu A.1.2 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu UK Power Networks 2015 All rights reserved 6 of 11
7 A.2 Double Circuit Laid Direct 300mm A.2.1 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu A.2.2 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu UK Power Networks 2015 All rights reserved 7 of 11
8 A.3 Three Circuits Laid Direct 300mm 300mm A.3.1 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu A.3.2 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu UK Power Networks 2015 All rights reserved 8 of 11
9 A.4 Single Circuit Ducted A.4.1 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu A.4.2 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu UK Power Networks 2015 All rights reserved 9 of 11
10 A.5 Double Circuit Ducted 300mm A.5.1 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu A.5.2 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu UK Power Networks 2015 All rights reserved 10 of 11
11 A.6 Triple Circuit Ducted 300mm 300mm A.6.1 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu A.6.2 Ratings 95mm 2 Al mm 2 Al mm 2 Al mm 2 Cu UK Power Networks 2015 All rights reserved 11 of 11
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