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Student & Learning Zone - City & Guilds
Blank IR Test etc
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<blockquote data-quote="boltonsparky" data-source="post: 505803" data-attributes="member: 4678"><p>Have a think about your test voltage. Also using this method can sometimes make the whole installation look like low IR because of how adding resistances work so splitting the installation is required if that's the case, it's that formula you may or may not have come across yet 1/RT= 1/R1 + 1/R2 + 1/R3 and so on. </p><p></p><p>Guidance note 3 has all of this stuff in it so it's a worthwhile purchase. There's also an old book I have from around the time of the 16th edition that is very useful, yes things move on but the fundamentals of testing pretty much stay the same. ISBN 2-9524138-3-5</p><p></p><p><a href="https://www.flickr.com/photos/189089393@N05/50803078782/in/dateposted-public/" target="_blank"><img src="https://talk.electricianforum.co.uk/uploads/imageproxy/50803078782_efe74f584d_b.jpg.f3a1462921f99a3daf31ffcffa47b285.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </a></p></blockquote><p></p>
[QUOTE="boltonsparky, post: 505803, member: 4678"] Have a think about your test voltage. Also using this method can sometimes make the whole installation look like low IR because of how adding resistances work so splitting the installation is required if that's the case, it's that formula you may or may not have come across yet 1/RT= 1/R1 + 1/R2 + 1/R3 and so on. Guidance note 3 has all of this stuff in it so it's a worthwhile purchase. There's also an old book I have from around the time of the 16th edition that is very useful, yes things move on but the fundamentals of testing pretty much stay the same. ISBN 2-9524138-3-5 [URL="https://www.flickr.com/photos/189089393@N05/50803078782/in/dateposted-public/"][IMG]https://talk.electricianforum.co.uk/uploads/imageproxy/50803078782_efe74f584d_b.jpg.f3a1462921f99a3daf31ffcffa47b285.jpg[/IMG] [/URL] [/QUOTE]
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Blank IR Test etc
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