The purpose of this test is to ensure that resistance of the protective conductors is sufficiently low to allow protective devices to operate effectively in the event of an earth fault. Test 3 – Maximum resistance of protective conductors This would arise if each end of a ring phase conductor were connected to different MCBs. – A circuit remaining live when the circuit MCB is in the off position. – Overloading of circuit conductors arising from an open circuit in phase or neutral at some point in the ring. If this test is overlooked or not carried out effectively the following serious hazards could remain undetected: The purpose of this test is to verify continuity of all conductors in each ring circuit. Test 2 – Continuity of ring circuit conductors
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ETCI NATIONAL RULES FOR ELECTRICAL INSTALLATIONS BOOKS VERIFICATION
– Method B incorporating the use of a wander lead is used for verification of bonding conductors and it can also be used for verification of protective conductors in smaller installations. This method applies to protective conductors only, it is not suitable for verification of continuity of bonding conductors. – Method A is useful for verification of continuity of protective conductors in medium to large installations where the use of a wander lead (as in method b) would be impractical. – All bonding clamps are making good contact – All items of equipment and accessories are properly connected to the protective conductors – Protective and bonding conductors are electrically sound, correctly connected and continuous throughout their length Test 1 – Continuity of protective and bonding conductors If an installation should fail a test, that test and any preceding tests that may have been influenced by the fault indicated shall be repeated after the fault has been rectified. Verification of operation of residual current devices.Verification of protection by separation of circuits, where applicable.Maximum resistance of protective conductor.Continuity of conductors in ring final circuits, where applicable.Continuity of protective conductors and of main and supplementary bonding conductors.Switches and combined switch-fuse units.Protective, earthing and bonding conductors.Furthermore all entries on the Completion Certificate or Declaration of Compliance should be filled in by the installing electrical contractor. However it is recommended that for all other works an appropriate form of certification is used (for example a Declaration of Compliance with ET 101 for Minor Works where appropriate). The inspection, testing and certification of existing electrical installations (in accordance with Chapter 62 of the Wiring Rules (ET101 – 4 th Edition – 2008 and to conform with Regulation 89 of SI Mo 732 of 2007).Īny works which do not fall within the above scope are not Controlled Works and shall not necessarily require a Completion Certificate to issue. Subsystems installed in Commercial, Industrial, and Domestic installations where the installation falls within the remit of the National Wiring Rules ĥ. The installation or replacement of one or more circuits in an existing installation, including the installation of one or more additional protective devices for such circuits on a distribution board Ĥ. The installation or replacement of a Distribution Board or Consumer Unit, or new installation in special locations as defined in Part 7 of the National Wiring Rules ET101 and ET105 ģ. The installation, commissioning, inspection and testing of a new fixed electrical installation requiring connection or re-connection to the electricity network Ģ. additions, alterations and /or extensions) which are covered by the National Wiring Rules and which involve:ġ. We are responsible for dealing with complaints concerning RECs.Ĭontrolled Works are major electrical works (incl.We audit & inspect RECs on a regular basis.
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