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Do-It-Yourself (DIY) Question & Answer Forum
Lighting Circuit Blowing........
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<blockquote data-quote="bnicholson" data-source="post: 28426" data-attributes="member: 1542"><p>Hi All,</p><p></p><p>a 5A wired fuse. I first took out every light bulb - 10 plus upstairs rooms(would like to know an easier way to fault find), disconnected the the lighting cable from the CU and measured the resistance between Line &amp; Neutral and to Earth and found the readings to be &gt;99.9K ohms in all instances.</p><p></p><p>Believing that one of the many bulbs had been causing the problem, I re-inserted the Fuse only for it to blow extremly quickly!</p><p></p><p>I am now baffled (it doesn't take much!), I have no idea why a circuit which appears to be open is causing a "deadish" short.</p><p></p><p>Appreciate any pearls of wisdom into any aspect of my fault finding procedure please.</p><p></p><p>Many thanks</p><p></p><p>Bob N.</p></blockquote><p></p>
[QUOTE="bnicholson, post: 28426, member: 1542"] Hi All, a 5A wired fuse. I first took out every light bulb - 10 plus upstairs rooms(would like to know an easier way to fault find), disconnected the the lighting cable from the CU and measured the resistance between Line & Neutral and to Earth and found the readings to be >99.9K ohms in all instances. Believing that one of the many bulbs had been causing the problem, I re-inserted the Fuse only for it to blow extremly quickly! I am now baffled (it doesn't take much!), I have no idea why a circuit which appears to be open is causing a "deadish" short. Appreciate any pearls of wisdom into any aspect of my fault finding procedure please. Many thanks Bob N. [/QUOTE]
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