Download PDF by Brian Scaddan IEng; MIIE (elec): 16th Edition IEE Wiring Regulations: Design and Verification

By Brian Scaddan IEng; MIIE (elec)

ISBN-10: 0750621362

ISBN-13: 9780750621366

This ebook builds at the simple wisdom and methods coated in sixteenth version IEE Wiring laws defined and Illustrated, supplying the knowledge and revision fabrics wanted for town & Guilds 2400 (Design, Erection and Verification of
Electrical Installations) examination. All Qualifying Managers might be required to realize this qualification, and Brian Scaddans ebook is the appropriate textual content for all scholars venture C&G 2400 courses.

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Additional info for 16th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations

Sample text

56 Inspection and testing 5 A comparison between Rx and R4 should reveal, if the ring is healthy, that R4 is approximately a quarter of Rv Method 2 The second method tests two ring circuit conductors at once, and is based on the following. Take two conductors XYZ and ABC and measure their resistances (Figure 20). Then double them both over, join the ends XZ and AC and the mid-points YB, and measure the resistance between XZ and AC (Figure 21). This value should be a quarter of that for XYZ plus a quarter of that for ABC.

2 The Electricity at Work Regulations 1989, state an absolute requirement in Regulation 4 (4), that test equipment be maintained in good condition. Hence it is important to ensure that regular calibration is carried out. 3 Test leads should have shrouded/recessed ends and/or when one end is a probe, it should be insulated to within 2 mm of the tip and have finger guards. 4 Test lamps should be of the approved type. Selection of test equipment As has been mentioned, instruments must comply with the relevant British Standard, and provided they are purchased from established bona fide instrument manufacturers, this does not present a problem.

3 Test leads should have shrouded/recessed ends and/or when one end is a probe, it should be insulated to within 2 mm of the tip and have finger guards. 4 Test lamps should be of the approved type. Selection of test equipment As has been mentioned, instruments must comply with the relevant British Standard, and provided they are purchased from established bona fide instrument manufacturers, this does not present a problem. There is a range of instruments needed to carry out all the standard installation tests, and 50 Inspection and testing some manufacturers produce equipment with dual functions, indeed there are now single instruments capable of performing all the fundamental tests.

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16th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations by Brian Scaddan IEng; MIIE (elec)


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