Internationally there has been steady progress towards the harmonisation of electrical wiring standards. European standards are based on the international IEC 364 under the umbrella of Harmonisation Document HD 384. The format of these is reflected in the ETCI national rules ET 101: 2008 and the UK IEE wiring regulations BS 7671:2008. This workshop is designed to provide up to date information and training on the current edition of National Rules ET 101: 2008. It will consist of in-depth teaching on all aspects of the national rules and their application with many practical examples and sample design calculations. The workshop includes references to safety, maintenance, inspection and testing. In addition, it provides a summary of some of the basic principles necessary for a good understanding of electrical installation technology. MORE INFORMATION: http://www.idc-online.com/content/practical-electrical-wiring-standards-national-rules-electrical-installations-et-1012008-2

1. Practical Electrical Wiring Standards –
National Rules for Electrical Installations –
ET 101:2008
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2. Course Contents
• Overview of the Rules
• Evolution of electrical distribution systems
• System earthing and protective earthing basics
• Planning of electrical systems
• Electrical safety
• Selection and erection of electrical equipment
• Installations in special locations
• Inspection and testing of installations
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3. Need for Standards
To ensure proper interfacing between equipment and
systems designed/ manufactured/installed by different
agencies. Standards contain stipulations on:
• Sockets, connectors and other connection interfaces used in
equipment's to ensure proper matching
• Voltage and Frequency parameters and permissible variations
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4. Need for Standards
To ensure manufacturing/Installation quality by
defining :
• Functionality
• Safety
• Maintainability
• Ratings and applicable conditions
• Tests to be done to verify the above
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5. Installations Covered
The Rules cover installations in:
· Industrial, commercial, residential,
agricultural/horticultural premises
· Prefabricated buildings and caravans
· Temporary installations such as those encountered in
construction sites, exhibitions, fairs etc.
· Outdoor installations
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6. Scope of the Rules
The Rules 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
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7. Scope of the Rules
· 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
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8. Exclusions
The Rules exclude:
· Public or private supply systems for the distribution of
electricity to consumers
· 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
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9. Legal Framework
• All work activity is governed in law by The Safety
Health and Welfare Act 1989
• Specific requirements under General Application
Regulations of 1993 (Next slide)
• Part VIII of the Regulations deals with Electricity
• ETCI National Rules elaborate the requirements for
complying with the Regulations
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10. General Application Regulations of 1993
• Part I Interpretation and General
• Part II General Safety and Health Provisions
• Part III Workplace
• Part IV Use of Work Equipment
• Part V Provision of Personal Protective Equipment
• Part VI Manual Handling of Loads
• Part VII Work with Display Screen Equipment
• Part VIII Electricity
• Part IX First Aid
• Part X Notification of Accidents and Dangerous
Occurrences
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11. Important Regulations in Part VIII
• Reg. 35: Duty of Employers to comply with Part
VIII and any relevant code of practice
• Reg. 36: Prevention of danger in electrical
installations
• Reg. 41: RCD protection for portable equipment
and socket outlets
• Reg. 45: Precautions against danger arising
from electrical equipment,
• Reg. 46: Work activity on or near any live part
• Reg. 48: Persons to be competent to prevent
danger
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12. Fundamental Principles
• Ensuring safety against direct and indirect shocks, thermal effects,
over current, fault current and over voltage
• Aspects that need to be considered in the design
• Selection of electrical equipment in order to suit the supply
parameters
• Erection of equipment so as to ensure safety in operation and
maintenance
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13. Contents of ET-101
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 or locations
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14. Organization of ET 101
Part 1: Scope, Object and Fundamental Principles
Part 3: Part 4: Part 5: Part 6: Part 7:
Assessment of
Protection
Selection and
Inspection
General
for Safety
Erection of
and
Characteristics
Equipment
Testing
Special
installations
or locations
Part 2: Definitions
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15. Other relevant materials
• There are Annexes to ET 101 Rules
• Annex names include the chapter numbers of the Rules to
which they pertain
• There are also other related National Rules (Ex: ET 105
and ET 106) applicable for specific installations
• ET Codes of practices and guides also provide useful
guidelines
– (For details refer to manual)
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16. Harmonised Standard
A Harmonised Standard is one which has been drawn up
by common agreement between national standards bodies
notified to the European Commission by all member
states and published under national procedures
– ET 101 Rules are based on IEC 60364 and Cenelec
60364.
– There is no intention at this time of harmonising Cenelec
60364
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17. DO YOU WANT TO KNOW MORE?
If you are interested in further training or information,
please visit:
http://idc-online.com/slideshare
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