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Legislation
                                   
                                   
                                   

                                  Protection for Safety

                                   
                                   

                                  Part 4, chapters 41 to 45

                                  Describes the various measures that are available to the installer and designer for the protection of people, property and livestock against Electric Shock, different definitions are now used for the 17th edition BS7671;2008.

                                  Residential Requirements

                                   
                                   

                                  Example
                                  The electrical system should be designed and installed so that live parts shall not be accessible and accessible conductive parts should not cause a hazard to the user.

                                  What it means
                                  Various measures can be employed to protect the users, shielding the live parts with enclosures and insulation are the most common. Additional protection is normally provided with Residual Current Devices.

                                  Solution
                                  Insulating the whole system and providing automatic disconnection of the supply definitions are now;

                                  • Basic protection (enclosures, insulation)
                                  • Fault protection (disconnection with mcb’s)
                                  • Additional protection (RCD) where needed

                                   

                                   
                                   

                                  Commercial Requirements

                                   
                                   

                                  Example
                                  The electrical system should be designed and installed so that live parts shall not be accessible and accessible conductive parts should not cause a hazard to the user.

                                  What it means
                                  Various measures can be employed to protect the users, shielding the live parts with enclosures and insulation are the most common. Additional protection is normally provided with Residual Current Devices.

                                  Solution
                                  Insulating the whole system and providing automatic disconnection of the supply definitions are now;

                                  • Basic protection (enclosures, insulation)
                                  • Fault protection (disconnection with mcb’s)
                                  • Additional protection (RCD) where needed

                                   

                                   
                                   
                                    
                                   
                                  To know more

                                  To know more 

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                                  The 17th Edition explained...

                                  Read our bite-sized guides for a breakdown of the key changes within the 17th edition wiring regulations

                                  1. Scope of the BS7671:2008
                                  2. Definitions used in BS7671:2008
                                  3. Assessment of Characteristics
                                  4. Protection for Safety
                                  5. Erection of Equipment
                                  6. Inspection and Testing
                                  7. Special Installations
                                   

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                                  17th Edition mock test

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                                  online mock test to see exactly how much you know about the 17th Edition.

                                   
                                   
                                   
                                   
                                   
                                   
                                   
                                   

                                  17th edition training schedule

                                  17th Edition training

                                  Buy a copy of the 17th edition

                                  Buy a copy