1 / 18

17 th Edition 2012 Amendments Seminar leading to 2012

David J Tinsley Electrical Consultancy Ltd. 17 th Edition 2012 Amendments Seminar leading to 2012 . AMENDMENTS OVERVIEW Earthing systems diagrams now in part 3 New numbering system for UK only Changes to fuse designations Chapter 44 electromagnetic influences added

zahi
Download Presentation

17 th Edition 2012 Amendments Seminar leading to 2012

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. David J Tinsley Electrical Consultancy Ltd 17th Edition 2012 Amendments Seminar leading to 2012

  2. AMENDMENTS OVERVIEW • Earthing systems diagrams now in part 3 • New numbering system for UK only • Changes to fuse designations • Chapter 44 electromagnetic influences added • Changes to Reg. 522.6 (cables in walls) • Part 6 now has Electrical Installation Condition Report • Part 7 changes/additions to Special Installations or Locations • Appendix 16 surge protective devices added • Appendices have changes & Appendix 11 & 12 deleted

  3. Regulation Numbering Part 6 Inspection & testing First Digit - Part Second Digits - Chapter Third Digits - Section Fourth Digits - Group Fifth Digits - Regulation Chapter 61 Initial verification 612.3.2 Group 3 Insulation resistance Regulation 2 Test voltages Section 612 Testing

  4. TABLES 41.2 Chapter 41 Protection against electric shock Actual Table Number Max. Zs Part 4 Protection for safety

  5. Regulation Numbering UK Part 5 Selection & erection of equipment Chapter 52 Selection & erection of wiring systems Section 522 Selection & erection of wiring systems in relation to external influences 522.6.100 UK Regulation only 100 series used when referring to CENELEC documents Group Impact AG

  6. Change to fuse designations • Removal of BS 1361 • Replaced with BS 88-3 & new ratings (ie: 16A, 32A etc.) • New time/current characteristic graphs in Appendix 3 • Changes to ratings means new maximum earth fault loop impedance values Tables 41.2 & 41.4 • Original BS 88 fuses now BS 88-2

  7. BS 88-3 System C old 1361 General Purpose BS 88-2 gG System E (Bolted) General Purpose BS 88-2 gM System G (Clip In) BS 1362 BS 3036 New Fuse Designations

  8. Changes to cables concealed in a wall or a partition 522.6.100 • Cables to be 50mm deep OR • Incorporate an earthed metal covering i.e. MI OR • Enclosed in earthed metal conduit OR • Enclosed in earthed trunking or ducting OR • Mechanically protected (capping not sufficient, must withstand penetration by nail, screws etc) • ALL to be in safe zones • Form part of a SELV or PELV circuit (NEW) Not allowed unless 50mm deep or i,ii,iii,iv are achieved Additional protection by RCD shall be provided if i, ii, iii or iv above not complied with. RCD to comply with regulation 415.1.1

  9. New section 710 Medical Locations • Applies to:- hospitals, dentists, private clinics, healthcare centres etc • Areas grouped (0,1,2) with different requirements for each • Requirement to assess what procedures take place to be able to determine groups • Installation of insulation monitoring devices • Installation of protective conductors of maximum resistance values • Need to ensure unwanted tripping of RCD’s • Lower disconnection times • Emergency safety sources required

  10. New section 729 Operating & Maintenance Gangways • Applies to:- switch rooms etc. where access is restricted to skilled/instructed persons • Minimum access required, measurements given • Clearly Marked Areas • Easy access & Egress

  11. Chapter 62 & Appendix 6 Model Forms for Certification & Reporting • New forms for periodic inspection & testing • Now issue an Electrical Installation Condition Report • Form for domestic & similar up to 100A • New scheduleof inspection results & schedule of test results • New observation codes C1, C2 & C3 • Electrical installation certificate inc schedule of inspection results for new work & minor electrical installation works certificate – NO CHANGE

  12. New Certification Forms

  13. New Forms For Certification

  14. New Forms for Certification

  15. New Codes on ECR’s CODES: C1 Danger exists, Risk of Injury, rectify Immediately C2 Potentially dangerous, remedial action required as a mater of Urgency C3 Improvement recommended

  16. Changes to Appendices Appendix 11 - Effects of Harmonic Currents on Balanced 3 Phase Systems Deleted by BS 7671:2008 (2011) moved to App.4 para. 5.5 & 5.6 Appendix 12 -Voltage Drop in Consumers Installations Deleted by BS 7671:2008 (2011) moved to App.4 para. 6.4

  17. Appendix 16 (Informative) Devices for Protection Against Overvoltage • Examples of connecting Surge Protective Devices to different systems • Different types of SPD & the locations they are required

  18. Questions...Please feel free to email any questions you may have on the changes to BS7671.

More Related