By Brian Scaddan IEng; MIIE (elec)
This booklet builds at the easy wisdom and strategies coated in sixteenth variation IEE Wiring rules defined and Illustrated, supplying the data and revision fabrics wanted for town & Guilds 2400 (Design, Erection and Verification of
Electrical Installations) examination. All Qualifying Managers could be required to achieve this qualification, and Brian Scaddans e-book is the correct textual content for all scholars venture C&G 2400 courses.
Read Online or Download 16th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations PDF
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Extra resources for 16th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations
4 Make a record of the test results. 5 When a zero reading is expected and occurs (or, in the case of insulation resistance, an infinite reading), make a quick check on the test leads just to ensure that they are not open circuited. 6 Return switches/selectors to the off position. 7 Replace instrument and leads in carrying case. The tests The IEE Regulations indicate a preferred sequence of tests and state that 53 Inspection and testing if, due to a defect, compliance cannot be achieved, the defect should be rectified and the test sequence started from the beginning.
It only takes around 10 to 15 mA to cause a severe electric shock, and 50 mA (l/20th of an ampere) to kill. Apart from the fact that such a device will register any voltage from about 5 V upwards, the safety of the user depends entirely on the integrity of the current limiting resistor in the unit. An electrician received a considerable shock when using such an instrument after his apprentice had dropped it in a sink of water, simply wiped it dry and replaced it in the tool box. The water had seeped into the device and shorted out the resistor.
Also, as many accessories have indicator lamps, and items of equipment such as fluorescent fittings have capacitors fitted, these should be disconnected as they will give rise to false readings. The test procedure is as follows: 62 Inspection and testing Poles to earth (Figure 29) Figure 29 1 2 3 4 Isolate supply Ensure that all protective devices are in place and all switches are closed Link all poles of the supply together (where appropriate) Test between the linked poles and earth. Between poles (Figure 30) Figure 30 1 2 3 4 As previous test As previous test Remove all lamps, equipment, etc.
16th Edition IEE Wiring Regulations: Design and Verification of Electrical Installations by Brian Scaddan IEng; MIIE (elec)