17th Edition Part 6

11,513 views

Published on

17th Edition Part 6

  1. 1. Requirements for Electrical Installations <ul><li>IEE Wiring Regulations </li></ul><ul><li>17 th Edition </li></ul><ul><li>Part 6 </li></ul>
  2. 2. IEE Wiring Regulations 17 th Edition - Part 6 <ul><li>This is NOT one of the larger parts in the 17 th Edition </li></ul><ul><li>It consists of 3 chapters: </li></ul><ul><li>Chapter 61 initial Verification </li></ul><ul><li>Chapter 62 Periodic Inspection and Testing </li></ul><ul><li>Chapter 63 Certification and reporting </li></ul>
  3. 3. Requirements for Electrical Installations <ul><li>IEE Wiring Regulations </li></ul><ul><li>17 th Edition </li></ul><ul><li>Part 6 </li></ul><ul><li>Inspecting and Testing </li></ul>
  4. 4. Chapter 61 INITIAL VERIFICATION <ul><li>610 – General </li></ul><ul><li>611 – Inspection </li></ul><ul><li>612 – Testing </li></ul>
  5. 5. Part 6 Inspecting and Testing <ul><li>Limited changes in Part 6 with model certificates & reports remaining largely unchanged </li></ul><ul><li>Insulation values increased - For systems up to and including 500 V the minimum insulation resistance is now 1M  </li></ul><ul><li>More detailed requirements are provided in relation to RCD testing </li></ul><ul><li>New regulations are included in relation to the checking of phase sequence and verification of voltage drops </li></ul>
  6. 6. Section 610 – General <ul><li>610.1 </li></ul><ul><li>Every installation shall, during its erection and on completion before being put into service, be inspected and tested to verify, as far as is reasonably practicable, that the requirements of the regulations have been met. </li></ul><ul><li>Precautions shall be taken to avoid danger to persons and to avoid damage to property and installed equipment. </li></ul>
  7. 7. Section 610 – General (cont.) <ul><li>610.2 – See sections 131, 311 to 313 and 514.9.1 for information required for the fundamental principles. </li></ul><ul><li>610.3 – The verification shall include comparison of the results with the relevant criteria to confirm that the requirements of the “Regs” have been met. </li></ul><ul><li>610.4 – For an addition or alteration to an existing installation. It shall be verified that the addition or alteration complies with the regulations, and does not impair the safety of the existing installation. </li></ul>
  8. 8. Section 610 – General (cont.) <ul><li>610.5 – The verification shall be made by a competent person . </li></ul><ul><li>610.6 – On completion of the verification, according to regulations 610.1 to 610.5, a certificate or certificates, shall be prepared. </li></ul>
  9. 9. Section 611 – Inspection <ul><li>611.1 – The inspection shall precede testing and shall normally done with that part of the installation under inspection disconnected from the supply. </li></ul>
  10. 10. Section 611 – Inspection (cont) <ul><li>611.2 – The inspection shall be made to verify that the installed electrical equipment is:- </li></ul><ul><li>In compliance with section 511 (this may be ascertained by mark or by certification furnished by the installer or by the manufacturer), and </li></ul><ul><li>Correctly selected and erected in accordance with the regulations, and </li></ul><ul><li>Not visibly damaged or defective, so as to impair safety. </li></ul>
  11. 11. Section 611 – Inspection (cont) <ul><li>611.3 – the inspection shall include at least the checking of the items on the inspection check list, where relevant to the installation, and where necessary, during erection: </li></ul><ul><li>A complete inspection checklist is shown in appendix 6 and also available to download from http://www.theiet.org/publishing/wiring-regulations/forms/ as indeed, are all of the forms that you may require. </li></ul><ul><li>A Sample of the inspection checklist is shown on the next slide </li></ul>
  12. 12. <ul><li>Section 611 – Inspection (cont) </li></ul><ul><li>The Schedule of Inspection </li></ul><ul><li>This form will be used for ALL installations </li></ul><ul><li>Record all your observations here with either a tick (  ) a cross (  ) or N/A </li></ul><ul><li>Simply work your way through the form item by item, this will ensure compliance with regulation 611.3. </li></ul>
  13. 13. 612 - Testing <ul><li>The tests of regulation 612.2 to 612.13, where relevant, shall be carried out and the results compared with the relevant criteria. </li></ul><ul><li>The tests of regulation 612.2 to 612.6, where relevant shall be carried out in that order before the installation is energised . </li></ul><ul><li>Where the installation incorporates an earth electrode, the test of regulation 612.7 shall also be carried out before the installation is energised </li></ul>
  14. 14. 612 – Testing (cont) <ul><li>If any test indicates a failure to comply, that test, and any preceding tests, the results of which may have been influenced by the fault indicated, shall be repeated after the fault has been rectified. </li></ul><ul><li>Some methods of test are described in the IEE Guidance Note 3 (when available), Inspection and Testing, published by the Institute of Engineering and Technology. </li></ul><ul><li>Other methods are not precluded provided that they give valid results. </li></ul>
  15. 15. 612 – Testing Section 612 details the required tests to be for initial verification. The tests should be carried out in a prescribed sequence, some prior to the circuits being energized.
  16. 16. 612 – Testing – (the dead tests) <ul><li>612.2 - continuity of protective conductor’s including main and equipotential bonding </li></ul><ul><li>612.2.2 - Continuity of ring final circuits </li></ul><ul><li>612.3 - insulation resistance (see table 61) </li></ul><ul><li>612.4 - protection by SELV, PELV or protection by separation </li></ul><ul><li>612.5 - Insulation resistance of floors and walls </li></ul><ul><li>612.6 - Polarity </li></ul><ul><li>612.7 – Earth electrode resistance </li></ul>
  17. 17. 612 – Testing – (the dead tests) <ul><li>Table 61 – Minimum Values of Insulation Resistance </li></ul><ul><li>Note: some of these values have changed from the previous edition </li></ul>≥ 1.0 1000 Above 500V ≥ 1.0 500 Up to and including 500V with the exception of the above system ≥ 0.5 250 SELV and PELV Minimum insulation resistance (M Ω) Test voltage d.c. (V) Circuit nominal voltage (V)
  18. 18. 612 – Testing – (the live tests) <ul><li>612.8 - Protection by automatic disconnection of supply </li></ul><ul><li>612.9 - Earth fault loop impedance </li></ul><ul><li>612.10 - Additional protection (RCDs) </li></ul><ul><li>612.11 - Prospective fault current </li></ul><ul><li>612.12 - Check of phase sequence </li></ul><ul><li>612.13 - Functional testing (inc. RCDs) </li></ul><ul><li>612.14 - Verification of voltage drop </li></ul>
  19. 19. Chapter 63 Certification and Reporting <ul><li>As I previously stated, all of the forms are in appendix 6 of BS 7671 or free to download from:- </li></ul><ul><li>http://www.theiet.org/publishing/wiring-regulations/forms/ </li></ul><ul><li>Examples of these are shown in the next few slides </li></ul>
  20. 20. The correct documentation must be issued to the person ordering the work TYPE OF WORK COMPLETED TYPE OF FORM REQUIRED New installation or change to existing installation Electrical Installation Certificate New installation work that does not include the provision of a new circuit Electrical Installation Certificate or Minor Electrical Installation Works Certificate Alterations or additions Electrical Installation Certificate Alterations or additions that does not include the provision of a new circuit Electrical Installation Certificate or Minor Electrical Installation Works Certificate Periodic Inspection and Testing Periodic Inspection Report
  21. 21. Electrical Installation Certificate (Form 1) This form to be used when only one person is responsible for the design, construction and testing of the installation
  22. 22. Electrical Installation Certificate (Form 2) <ul><li>This requires 3 signatures </li></ul><ul><li>The designer </li></ul><ul><li>The constructer </li></ul><ul><li>The inspector </li></ul>
  23. 23. <ul><li>You will need to complete one of these for every installation that has been tested. </li></ul>The Installation Test Certificate (form 4)
  24. 24. Minor Works Certificate (form 5) <ul><li>To be used for minor works only </li></ul><ul><li>Not for new circuits, or </li></ul><ul><li>New installations </li></ul>
  25. 25. Periodic Inspection Report (form 6) <ul><li>To be used when “next inspection” date is due - or </li></ul><ul><li>On change of use - or </li></ul><ul><li>On change of ownership </li></ul><ul><li>This is now part of the “sellers pack” when homes are for sale </li></ul>
  26. 26. That brings us to the end of PART 6 INSPECTING AND TESTING <ul><li>Any questions? </li></ul><ul><li>GOOD – We will carry on - - - - - - - - </li></ul><ul><li>To </li></ul><ul><li>SPECIAL INSTALLATIONS OR LOCATONS </li></ul>
  27. 27. That’s all Folks
  28. 28. COMPETANT PERSON <ul><li>From Part 2 Definitions </li></ul><ul><li>A person who possesses sufficient technical knowledge, relevant practical skills and experience for the nature of the electrical work undertaken and is at all times able to prevent danger and, when appropriate, injury to himself/herself and others. </li></ul>
  29. 29. 612.12 – Check of phase sequence For multi-phase circuits there is a requirement to verify that phase sequence is maintained
  30. 30. 612.14 – Verification of voltage drop This subject matter was covered previously in Section 523 (and Appendix 12). Regulation 612.14 is short, so briefly familiarize yourself with its content.

×