Practical Electrical Wiring Standards - IEE BS7671:2008+A1:2001 Edition
-
Upload
idc-technologies -
Category
Engineering
-
view
695 -
download
11
description
Transcript of Practical Electrical Wiring Standards - IEE BS7671:2008+A1:2001 Edition
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Practical Electrical Wiring Standards –
IEE BS7671:2008+A1
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Course Objective
• Familiarising the participants with IET Wiring Regulations 17th edition (referred to in this course as the Regulations) and published as BS-7671-2008 – Amendments 1 and 2
• Giving the participants an insight into the reasoning behind the stipulations contained in the Regulations
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Course Contents
• Overview of the Regulations• Evolution of electrical distribution
systems• System earthing and protective
earthing basics• Planning of electrical systems• Electrical safety• Selection and erection of electrical
equipment• Inspection and testing of installations • Installations in special locations
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Need for Standards
• To ensure proper interfacing between equipment and systems designed/ manufactured/installed by different agencies. Standards contain stipulations on:
- Voltage and Frequency parameters and permissible variations
- Sockets, connectors and other connection interfaces used in equipment to ensure proper matching
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Objective of the Regulations
• To provide the rules for the design and erection of electrical installations covered under its scope to ensure safety and proper functioning of the installation
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Installations Covered
The Regulations cover installations in:· Industrial, commercial, residential, agricultural/horticultural
premises
· Prefabricated buildings and caravans
· Temporary installations such as those encountered in construction sites, exhibitions, fares, etc.
· Highway power supplies and outdoor lighting installations
· Medical locations
· Operating and maintenance gangways
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Scope of the Regulations
The Regulations cover the following:
· Circuits supplied at nominal voltage up to and including 1000 V AC or 1500 V DC
· Circuits of over 1000 V AC when derived from an installation of less than 1000 V AC
· Wiring and cabling systems
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Scope of the Regulations
· All consumer installations external to the building
· All fixed and External wiring requirements for communication and information technology systems
· Additions and alterations to existing installations
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Exclusions
The Regulations exclude:
· Distributor’s Works
· Railway traction, rolling stock and signaling systems
· Motor vehicles and equipment on board ships, off shore installations and aircraft
· Mines and Quarry equipment covered by other statutory regulations
· Lightning protection installations on buildings
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Content of the Regulations
Part 1: Scope, Object and Fundamental Principles
Part 2: Definitions
Part 3: Assessment of General characteristics
Part 4: Protection for Safety
Part 5: Selection and Erection of Equipment
Part 6: Inspection and Testing
Part 7: Special Installations
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Amendments to the Regulations
There are a total of sixteen appendices to the regulations dealing with the following topics.
Appendix 1
British Standards to which reference is made
Appendix 2
Statutory regulations and associated memoranda
Appendix 3
Time/current characteristics of over current protective devices
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Appendices to the Regulations
Appendix 4
Current-carrying capacity and voltage drop for cables and flexible cords includes former Appendices 11 and 12
Appendix 5
Classification of external influences
Appendix 6
Electrical Installation Certificate and Periodic Inspection Report forms
Appendix 7 (added in Amendment 2)
Harmonized cable core colors
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Appendices to the Regulations
Appendix 8
Current-carrying capacity and voltage drop for busbar
trunking and powertrack systems Appendix 9
Definitions - multiple source, DC and other systems Appendix 10
Protection of conductors in parallel against overcurrent Appendix 11
Now Blank for future use
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Appendices to the RegulationsAppendix 12
Now Blank for future use
Appendix 13
Methods for measuring the insulation resistance/impedance of floors and walls to Earth or to the protective conductor system
Appendix 14
Measurement of earth fault loop impedance:consideration of the increase of the resistance of conductors with increase of temperature
Appendix 15
Ring and radial final circuit arrangements
Appendix 16
Selection of Surge Protection Devices
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Guidance Notes to the Regulations
The IET has published a series of eight Guidance Notes to aid users of the Regulations
These are:1. Selection and erection of Equipment2. Isolation and Switching3. Inspection and Testing4. Protection against Fire5. Protection against Electric Shock
6. Protection against Over current
7. Special Locations
8. Earthing and Bonding
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
Harmonised StandardA Harmonised Standard is one which has been drawn up by common agreement between national standards bodies notified to European Commission by all member states and published under national procedures
– The Wiring Regulations since the 15th Edition have been based on IEC 60364 and Cenelec (CLC) 60364.
– The 17th edition saw adoption of IEC numbering system, in which the component parts of a Regulation number are separated by a decimal point, as an aid to implementing changes to the requirements given in the International (IEC) and European (Cenelec) base documents
– A number of requirements contained in BS 7671 are particular to the United Kingdom. To show where this is the case, a ‘100’ component has been introduced to the numbering system. For example, Regulation 522.2.100.
Technology Training that WorksTechnology Training that Workswww.idc-online.com/slideshare
DO YOU WANT TO KNOW MORE?
If you are interested in further training or information, please visit:
http://idc-online.com/slideshare