Guidance Note 5: Protection Against Electric Shock (IEE by Institution of

By Institution of

A sequence of steerage Notes has been issued, every one of which enlarges upon and amplifies the actual necessities of part of BS 7671:2001 (IEE Wiring rules, sixteenth Edition). every one of those courses is broadly cross-referenced to the rules hence supplying handy and prepared entry. a few advice Notes include info now not incorporated within the sixteenth variation yet which was once integrated in past versions of the IEE Wiring rules. all of the publications were up-to-date to align with BS 7671: 2001.

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Extra info for Guidance Note 5: Protection Against Electric Shock (IEE Guidence Notes) (No. 5)

Example text

This would not constitute a reduced low voltage system as prescribed in BS 7671, and it would not provide the same degree of protection against indirect contact. It would be a low voltage system. (See HSE Information Document HSE 482/2). 6 471-15-03 Automatic disconnection and portable equipment outdoors With specified exceptions, every circuit intended or reasonably expected to supply portable equipment for use outdoors, whether or not including a socket-outlet, is required to be provided with supplementary protection against direct contact by means of an RCD.

Here, each set being worked on is supplied via its own isolating transformer, so that there is no electrical connection between them. However, the danger of direct contact remains for a person servicing a live chassis, and other less obvious ways of receiving electric shock can also arise. This is why, in these applications of the measure, further precautions are usually included and might, for instance, include a detection circuit for each separated circuit which will provide a suitable warning of a first fault appearing in the separated circuit.

If, however, the separated circuit feeds a number of items of equipment, the exposed-conductive-part of those items (except the source itself) are to be connected together by an insulated equipotential bonding conductor and not connected to earth or to other protective conductors, etc. In addition, any exposed-conductive-part of the source shall not be simultaneously accessible with any exposed-conductive-part of equipment supplied by the separated circuit. 413-06-02(iii)(b) A warning notice is also required to be fixed at every point of access into the location to warn against the importation of an earth.

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