IET Guidance Note 3 - Electrical Inspection Testing Smaller - [PDF Document]Your Account. This popular guide clarifies the requirements for inspection and testing, explaining in clear language those parts of the IET Wiring Regulations that most need simplifying. In addition to the descriptive and diagrammatic test methods that are required, explanations of the theory and reasoning behind test procedures are given, together with useful tables for the comparison of test results. The book also provides essential information on the completion of electrical installation certificates, with a step-by-step guide on the entries that need to be made and where to source data. Skip to main content. Search: Search all titles. Search all titles Search all collections.
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Guidance Note 3: Inspection and Testing (Iee Guidence Notes)
In these circumstances the potential of the protective conductor could approach phase voltage for the duration of the test see paragraph 4. The contents of Appendix 14 concerning earth fault loop impedance have been moved indpection Appendix 3. Protective devices The choice and setting of each protective device including monitoring devices should be compared with the design. Listed below are requirements to be checked when carrying out an installation inspection.
These resistances are r1, rn and r2 respectively. With many instruments, the voltage between phases can not be measured directly. Forum Radio Station. Special care must be taken where control and protective devices contain electronic components.
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Recommended date of next inspection This figure errs on the side of safety. Connection to the earth electrode is made using terminals C1 and P1 of a four-terminal earth tester. To minimise electric shock hazard from the potential of the protective conductor, the test duration should be within safe limits. This will enable deterioration to be identified.
This list is not exhaustive as there are many smaller changes throughout the book not included here. BS Requirements for Electrical Installations will be issued on 2nd July and is intended to come into effect on 1st January The Regulations apply to the design, erection and verification of electrical installations, also additions and alterations to existing installations. Existing installations that have been installed in accordance with earlier editions of the Regulations may not comply with this edition in every respect. This does not necessarily mean that they are unsafe for continued use or require upgrading. Regulation Section contains a number of significant changes.
The larger of the two values Ipf should be recorded on the Schedule of Test Results. If you were the person ordering the work, the values in Appendix 2 of this Guidance Note earth fault loop impedance figures provided by the designer tabulated values in BS, to the own. Verification of test results Values of Zs should be compared with one of the following: 1 2 3 4 1 for standard thermoplastic pvc circui? Start by pressing the button below.
Instrument: Use an applied voltage tester for this test. Each device for protection, and be suitably labelled where necessa. The size and complexity of the installation will dictate the nature and extent of the manual. Benchaffey said:.