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17th Edition 2012
Amendments Seminar
leading to 2012
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leading to 2012
AMENDMENTS OVERVIEWEarthing 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
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Regulation Numbering
612.3.2
Chapter 61
Initial
verification
Section 612
Testing
Group 3
Insulation
resistance
Regulation 2
Test voltages
Part 6
Inspection &
testing
First Digit - Part
Second Digits - Chapter
Third Digits - Section
Fourth Digits - Group
Fifth Digits - Regulation
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TABLES
41.2
Part 4
Protection for
safety
Chapter 41
Protection against
electric shock
Actual Table Number
Max. Zs
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Regulation Numbering UK
522.6.100
Chapter 52
Selection & erection
of wiring systems
Group
Impact AG
UK Regulation only 100series used when referring to
CENELEC documents
Part 5
Selection &
erection of
equipment
Section 522
Selection & erection
of wiring systems in
relation to externalinfluences
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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
Change to fuse designations
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New Fuse Designations
General
Purpose BS
88-2 gG
System E
(Bolted)
Colour coded as BS 3036Colour coded as BS 3036BS 88-3
System C
old 1361
BS 3036
General
Purpose BS
88-2 gM
System G
(Clip In)
BS 1362
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Changes to cables concealed in a wall
or a partition
522.6.100
Cables to be 50mm deep OR
i. Incorporate an earthed metal covering i.e. MI
OR
ii. Enclosed in earthed metal conduit OR
iii. Enclosed in earthed trunking or ducting OR
iv. Mechanically protected (capping not sufficient,
must withstand penetration by nail, screws
etc)
v. ALL to be in safe zones
vi. 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
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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 devicesInstallation of protective conductors of maximum resistance values
Need to ensure unwanted tripping ofRCDs
Lower disconnection times
Emergency safety sources required
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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
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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
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New Certification Forms
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New Forms For Certification
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New Forms for Certification
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CODES:
C1 Danger exists, Risk of Injury, rectify Immediately
C2 Potentially dangerous, remedial action required as a mater of Urgency
C3 Improvement recommended
New Codes on ECRs
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Appendix 11 - Effects of Harmonic Currents on
Balanced 3 Phase Systems
Appendix 12 -Voltage Drop in Consumers Installations
Deleted by BS 7671:2008 (2011) moved to App.4 para. 5.5 & 5.6
Deleted by BS 7671:2008 (2011) moved to App.4 para. 6.4
Changes to Appendices
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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
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Questions...Please feel free to email any questions you
may have on the changes to BS7671.