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Student & Learning Zone - City & Guilds
A friend in need
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<blockquote data-quote="martinxxxxxx" data-source="post: 224441" data-attributes="member: 6454"><p>Hope you have enjoyed you sunday lunch, you are very lucky, kids have sick and poo bug here so it has been cancelled.</p><p></p><p>Just to give you a hand to get started, here are my thoughts</p><p></p><p>1 - When applying a test voltage to an item of class I equipment, a value of 0.1 MOhms is obtained. One possible reason for this low reading could be:</p><p></p><p>D - a short circuit between live conductors within the appliance cord set</p><p></p><p>We are not measuring this with this test</p><p></p><p>C - an open circuit has occurred within the protective conductor</p><p></p><p>This is going to give infinity ohms, so cant be right</p><p></p><p>B - progressive failure of the insulation between live conductors</p><p></p><p>The pat tester does not measure BETWEEN live conductors, so this can be right.</p><p></p><p>A - progressive failure of the insulation between live conductors and earth</p><p></p><p>We must be getting warm here, this is exactly the fault we are on the look out for when we do this test. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="martinxxxxxx, post: 224441, member: 6454"] Hope you have enjoyed you sunday lunch, you are very lucky, kids have sick and poo bug here so it has been cancelled. Just to give you a hand to get started, here are my thoughts 1 - When applying a test voltage to an item of class I equipment, a value of 0.1 MOhms is obtained. One possible reason for this low reading could be: D - a short circuit between live conductors within the appliance cord set We are not measuring this with this test C - an open circuit has occurred within the protective conductor This is going to give infinity ohms, so cant be right B - progressive failure of the insulation between live conductors The pat tester does not measure BETWEEN live conductors, so this can be right. A - progressive failure of the insulation between live conductors and earth We must be getting warm here, this is exactly the fault we are on the look out for when we do this test. :) [/QUOTE]
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