17th edition 2011 amendments

7/28/2019 17th Edition 2011 Amendments

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17th Edition 2012

Amendments Seminar

leading to 2012


2/18

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


6/18

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


7/18

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


8/18

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


9/18

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


10/18

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


11/18

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


12/18

New Certification Forms


13/18

New Forms For Certification


14/18

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


16/18

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.

17th edition 2011 amendments

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