New PDF release: 16th Edition IEE Wiring Regulations: Design and Verification

By Brian Scaddan IEng; MIIE (elec)

ISBN-10: 0750621362

ISBN-13: 9780750621366

This publication builds at the easy wisdom and methods lined in sixteenth version IEE Wiring laws defined and Illustrated, supplying the data and revision fabrics wanted for the town & Guilds 2400 (Design, Erection and Verification of
Electrical Installations) examination. All Qualifying Managers could be required to realize this qualification, and Brian Scaddans e-book is definitely the right textual content for all scholars project C&G 2400 courses.

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

Example text

0 mm2 stranded conductors may be installed in a straight 3 m run of 25 mm conduit? 0 mm conductors may be installed. 0 mm2 conductors? 0 mm2 = 58 Overall cable term = 58 x 8 = 464 Nearest conduit term above this is 600, giving 32 mm2 conduit. 39 Design EXAMPLE 8 What size trunking would be needed to accommodate twenty-eight, 10 mm2 conductors? 4 Nearest trunking term above this is 1037, giving 50 mm x 50 mm trunking. EXAMPLE 9 What size of trunking would be required to house the following conductors: 2 0 - 1 .

An approved test lamp should be of similar construction to that shown in Figure 16. 51 Inspection and testing Figure 16 Approved test lamp The following procedure is recommended when using approved test lamps to check that live parts have been made dead: 1 Check that the test lamp is in good condition and that the leads are undamaged. ) 2 Establish that the lamp is sound by probing onto a known supply. This is best achieved by using a proving unit. This is simply a pocket sized device which electronically produces 230 V dc.

Method 2 Connect one test instrument lead to the main earthing terminal, and a long test lead to the earth connection at all the outlets in the circuit. Record the value after deducting the lead resistance. An idea of the length of conductor is valuable, as the resistance can be calculated and compared with the test reading. Table No. 2 gives resistance values already calculated for a range of lengths and csas. 03 It should be noted that these tests are applicable only to 'all insulated' systems, as installations using conduit, trunking, MICC and SWA cables will produce spurious values due to the probable parallel paths in existence.

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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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