cop revision - power point - eng - genral
TRANSCRIPT
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The New Code of Practice for The New Code of Practice for the Electricity (Wiring) the Electricity (Wiring)
RegulationsRegulations
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To provide general To provide general technical technical guidelinesguidelines
Satisfying the Satisfying the relevant provisions relevant provisions of the E(W)Rof the E(W)R
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Before Enactment of E.O.Before Enactment of E.O. IEE Wiring Regulations (U.K.)IEE Wiring Regulations (U.K.) Supply Rules (H.K.)Supply Rules (H.K.)
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More embracing and More embracing and systematic regulatory systematic regulatory framework for the framework for the electrical industryelectrical industry
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1st edition - 1992
2nd edition - 1997
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ReadersReaders Registered Electrical Contractors Registered Electrical Contractors
(REC)(REC) Registered Electrical Workers Registered Electrical Workers
(REW)(REW) Professionals Professionals
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Review regularly Review regularly Keep pace with technological advancementKeep pace with technological advancement Reference to most updated international standReference to most updated international standardsards
CoP PolicyCoP Policy
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Revision ProcessRevision ProcessInvite Invite commentscomments
12/01 6/02 12/02
FeedbaFeedbackck
Working Working groupgroup
MeetingMeeting
10/01
2/02 3/02
4/02 7/02 11/02
3/03
6/03 12/03
7/03
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Working Group Working Group MembersMembersGovernment Departments
Power Companies
Academic Institutions
Professional Institutions
Consultant/ Contractor Associations & Worker Union
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Discussion and Revisions:Discussion and Revisions: More than 220 items discussedMore than 220 items discussed Over 60 revisions accepted Over 60 revisions accepted
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Revisions:Revisions: Reference to International Reference to International
StandardsStandards Reference to latest IEC standards Reference to latest IEC standards
( e.g. IEC 60364)( e.g. IEC 60364) Include the National Standard in Mainland CInclude the National Standard in Mainland China (Guo Biao, e.g.GB 16895)hina (Guo Biao, e.g.GB 16895) Revisions agreed by Working GroupRevisions agreed by Working Group
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Effective Date:Effective Date: ImmediateImmediate Installation comply with CoP (1997 Installation comply with CoP (1997
edition) is deemed to have met the edition) is deemed to have met the Wiring Regulations ifWiring Regulations if- completed and connected to completed and connected to
electricity supply before 1 January electricity supply before 1 January 2006;2006;
1.1.20041.1.2004 1.1.20061.1.2006
1997 edition1997 edition1997 / 2003 edition1997 / 2003 edition 2003 edition2003 edition
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Revisions:Revisions:Code 2 - DefinitionsCode 2 - Definitions
Overhead linesOverhead lines Restrictive conductive locationRestrictive conductive location Protective extra-low voltage (PELV)Protective extra-low voltage (PELV)
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Revisions:Revisions:Code 4A - Updated the List of Recognized Code 4A - Updated the List of Recognized
BodiesBodies HKAS’s recognized organizationsHKAS’s recognized organizations Include Mainland’s accreditation bodyInclude Mainland’s accreditation body
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Revisions:Revisions:Code 4A - Updated the List of Recognized Code 4A - Updated the List of Recognized
BodiesBodies
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Revisions:Revisions:Code 4D(3) - Inspection and Code 4D(3) - Inspection and
TestingTesting power factor requirementpower factor requirement general assessment general assessment
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Revisions:Revisions:Code Code 4I - General Safety Practic4I - General Safety Practiceses Check before Act Check before Act Isolate and Lockout Isolate and Lockout De-energizeDe-energize OtherOthers s
Communal electrical installations in a building include the main switch and the riser supplying electricity to individual units and communal services such as lifts, pumps and communal lighting, etc.
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Revisions:Revisions:Code 6B - Basic Requirements of Code 6B - Basic Requirements of
CircuitsCircuits interconnection facilities should be providinterconnection facilities should be provided if requested by power companyed if requested by power company
T T
Code 6E - Final circuits using 13A socket Code 6E - Final circuits using 13A socket outletsoutlets Connection arrangement for shaver supply Connection arrangement for shaver supply unitunit
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Revisions:Revisions:Code 8A - Provision of isolation and Code 8A - Provision of isolation and
switchingswitching Isolation requirement for exhaust fans haviIsolation requirement for exhaust fans having rated power not exceeding 50W ng rated power not exceeding 50W
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Revisions:Revisions:Code 8B - Requirements of isolation and Code 8B - Requirements of isolation and
switching devicesswitching devices Isolation - clearly and reliably indicated by “Isolation - clearly and reliably indicated by “off” or “open” marking. off” or “open” marking. Emergency stop push button should not be uEmergency stop push button should not be used for isolation. sed for isolation.
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Revisions:Revisions:Code 9B - Relation between circuit Code 9B - Relation between circuit
conductors and overcurrent conductors and overcurrent protective devicesprotective devices are of the same construction, material and crosare of the same construction, material and cross-sectional area, and are approximately the sas-sectional area, and are approximately the same length, and appropriate phase disposition; me length, and appropriate phase disposition;
Type Instantaneously Tripping Current
BCD
3 In < I 5 In5 In < I 10 In10 In < I 20 In
Table 9(4) - Table 9(4) - Classification of MCB to IEC 60898 Classification of MCB to IEC 60898
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Revisions:Revisions:Code 14B – Steel conduit systemCode 14B – Steel conduit system comply with BS4568, BS EN 60423, BS EN 50086,comply with BS4568, BS EN 60423, BS EN 50086, IEC60423, IEC60614-1or equivalent. IEC60423, IEC60614-1or equivalent. Code 14C – Steel trunking systemCode 14C – Steel trunking system Metallic trunkings having nominal size differinMetallic trunkings having nominal size differing from the table but complying with IEC 61084 g from the table but complying with IEC 61084 or equivalent are also acceptableor equivalent are also acceptable ..
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Revisions:Revisions:Code 15E – ImpactCode 15E – Impact concealed bonding conductor should run concealed bonding conductor should run
within 150mm of angle formed by within 150mm of angle formed by wall/partitionwall/partition
short PVC concealed conduit within short PVC concealed conduit within 150mm of angle formed by wall/ partition 150mm of angle formed by wall/ partition => 25mm depth=> 25mm depth
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Revisions:Revisions:Code 21B(2) – Sequence of testsCode 21B(2) – Sequence of tests(i) continuity of protective conductors, including (i) continuity of protective conductors, including
main and supplementary equipotential bonding,main and supplementary equipotential bonding,(ii) continuity of ring final circuit conductors,(ii) continuity of ring final circuit conductors,(iii) insulation resistance,(iii) insulation resistance,(iv) polarity,(iv) polarity,(v) earth electrode resistance,(v) earth electrode resistance,(vi) earth fault loop impedance,(vi) earth fault loop impedance,(vii) functions of all protective devices,(vii) functions of all protective devices,(viii) functions of all items of equipment. (viii) functions of all items of equipment.
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Revisions:Revisions:Code 21B(5) – Earth electrode resistanceCode 21B(5) – Earth electrode resistance alternative method for measuring the alternative method for measuring the
earth electrode resistance by loop earth electrode resistance by loop impedance tester impedance tester
Code 21B(6) – Insulation resistanceCode 21B(6) – Insulation resistance testing for voltage sensitive devicestesting for voltage sensitive devices
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Revisions:Revisions:Code 21B(9) – Testing of RCDCode 21B(9) – Testing of RCD general purpose RCD or RCBO:general purpose RCD or RCBO:
- leakage current = 50% of the rated tripping cur- leakage current = 50% of the rated tripping current of the RCD, the device should not open;rent of the RCD, the device should not open;- leakage current = 100% of the rated tripping cu- leakage current = 100% of the rated tripping current of the RCD, the device should open in less trrent of the RCD, the device should open in less than 300 ms.han 300 ms.
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Revisions:Revisions:Code 25A – Wiring installation using Code 25A – Wiring installation using
conduitsconduits cable lubricant:cable lubricant:- not negatively interact with the cable;- not negatively interact with the cable;- not increase the flame spread;- not increase the flame spread;- not decrease the fire resistant properties of the - not decrease the fire resistant properties of the cable cable
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Revisions:Revisions:Code 25A(2) – Wiring installation using steel Code 25A(2) – Wiring installation using steel
conduitsconduits Length of each flexible conduit should be kept to Length of each flexible conduit should be kept to a minimum of not more than 1 m a minimum of not more than 1 m for general applifor general applications or 2 m inside false ceiling.cations or 2 m inside false ceiling.
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Revisions:Revisions:
Based on IEC 60364-7-701Based on IEC 60364-7-701 Installed in Zone 3 location Installed in Zone 3 location
(i.e. 0.6m away from bath tub) (i.e. 0.6m away from bath tub)
Code 26A(3) – Electrical equipment in Code 26A(3) – Electrical equipment in bathroombathroom
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Revisions:Revisions:Code 26I – Lightning protection installationCode 26I – Lightning protection installation Lightning protection installations should be instaLightning protection installations should be installed to IEC 61024, BS 6651 or equivalent.lled to IEC 61024, BS 6651 or equivalent.
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Revisions:Revisions:Code Code 26M - Swimming Pools and Fountains Install26M - Swimming Pools and Fountains Installationation
Fountains Fountains intended to be occupied: swimming pools.intended to be occupied: swimming pools. not intended to be occupied: new not intended to be occupied: new
requirementsrequirements
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Revisions:Revisions:Table 26(1)
Recommended Number of Socket Outlets in DwellingsLocation Minimum No. of
Socket OutletsRecommended Maximum Floor Area in sq. metre Served by a Socket Outlet
Kitchen 3 1.2
Living/ Dinning Room
4 2.5
Bedroom 2 3
Store 1 --
Utility Room
3 --
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Revisions:Revisions:
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Revisions:Revisions:
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Revisions:Revisions:New Appendix 12 – Worked examplesNew Appendix 12 – Worked examples Determination of Extraneous Conductive PartsDetermination of Extraneous Conductive Parts
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Revisions:Revisions:New Appendix 13 – ChecklistNew Appendix 13 – Checklist Revised according to CoP revisions Revised according to CoP revisions
(e.g. bathroom socket outlet)(e.g. bathroom socket outlet) Add a checklist for lightning protection Add a checklist for lightning protection
installationinstallation
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Revisions:Revisions:New Appendix 14 – ReferenceNew Appendix 14 – Reference
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Revisions:Revisions:
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Most popular government Most popular government publicationpublication
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Purchase of CoP:Purchase of CoP: Publications Sales Section of the Publications Sales Section of the Information Services Department Information Services Department Room 402, Murray Building, Room 402, Murray Building, Garden Road, Central.Garden Road, Central. order by phone (no. 2537 1910)order by phone (no. 2537 1910) by e-mail at [email protected] e-mail at [email protected]
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Keep abreast of the latest Keep abreast of the latest developmentdevelopment
Close consultation with the trade and Close consultation with the trade and industryindustry
The Way ForwardThe Way Forward
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Your suggestion and Your suggestion and feedback feedback
are always welcomeare always welcome
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Thank Thank youyou