By Christopher Kitcher
The seventeenth variation of The IEE Wiring rules is a fancy booklet that needs to be learn along the IEE counsel notes with a view to be absolutely understood. every person utilizing wiring needs to conform to the laws and feature handed tests within the topic. This ebook presents an simply comprehensible operating interpretation of the rules that walks readers via them in step by step demeanour. A step by step method of the laws makes a tough topic effortless to understand.Mapped to the rules for simple go referencing.Packed with illustrations and diagrams to place the topic into context
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Extra info for A Practical Guide to the 17th Edition of the Wiring Regulations, 1st Edition
V) Lightning protective systems should be considered with regard to bonding. Unfortunately, it is not just a matter of connecting the correct size of bonding conductor to the lightning conductor, unless the person carrying out the work has a full understanding of BS EN 62305. The advice of a consultant is required. A letter must be obtained stating that the lightning conductor must be bonded, or in the case of no bonding being required the letter must state that this is the case. Remote buildings on the same installation need to be bonded individually and must comply with the same requirements as the main building.
6 times their rating. 13 times the device rating for 1 hour without operating. 45 times their rating. The 1 hour is known as the conventional time and applies to protective devices up to 63 A. For protective devices of 63 A or above, the conventional time is extended to 2 hours. The current which causes operation of the protective device in the conventional time is shown by the symbol I2. Diversity in this installation can now be applied. Ring circuits: Diversity is calculated at 100% for circuit 1 and 40% for circuit 2.
We also have to comply with the building regulations. It is an unfortunate fact that persons who want to carry out most forms of construction work do not require qualifications. For this reason, the required support between trades to ensure that this type of protection is effective is unlikely to be available. 2 Protection by earth-free local equipotential bonding These are areas in which most electricians will never be called upon to work, as they are very specialist areas such as operating theatres and laboratories.