By Brian Scaddan
This re-creation brings this functional ebook into line with the sixteenth variation of the IEE Wiring rules which was once released in may possibly 1991. Brian Scaddan is the writer of "Wiring platforms and Fault discovering for install Electricians".
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Extra info for 16th edition IEE wiring regulations : explained and illustrated
External inﬂuences Appendix 5 of the IEE Regulations classifies external influences which may affect an installation. This classification is divided into three sections, the environment (A), how that environment is utilized (B) and construction of buildings (C). The nature of any influence within each section is also represented by a letter, and the level of influence by a number. The following gives examples of the classification: Environment Utilization Building Water AD6 Waves Capability BA3 Handicapped Materials CA1 Non-combustible With external influences included on drawings and in specifications, installations and materials used can be designed accordingly.
50 Protection Figure 15 Mineral-insulated cable. On impact, all parts including the conductors are flattened, and a proportionate thickness of insulation remains between conductors, and conductors and sheath, without impairing the performance of the cable at normal working voltages Polyvinyl chloride PVC is a thermoplastic polymer widely used in electrical installation work for cable insulation, conduit and trunking. General-purpose PVC is manufactured to the British Standard BS 6746. PVC in its raw state is a white powder; it is only after the addition of plasticizers and stabilizers that it acquires the form that we are familiar with.
E. 150 mA. Protection against indirect contact (IEE Regs Section 413 and Regs 471–08 to 12) The IEE Regulations suggest five ways of protecting against indirect contact. One of these, earthed equipotential bonding and automatic disconnection of supply, has already been discussed in Chapter 2. The other methods are as follows. Use of class 2 equipment Often referred to as double-insulated equipment, this is typical of modern appliances where there is no provision for the connection of a CPC. This does not mean that there should be no exposed conductive parts and that the casing of equipment should be of an insulating material; it simply indicates that live parts are so well insulated that faults from live to conductive parts cannot occur.
16th edition IEE wiring regulations : explained and illustrated by Brian Scaddan