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insulation resistance testing
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<blockquote data-quote="SPECIAL LOCATION" data-source="post: 58126" data-attributes="member: 250"><p>Hello Kung</p><p></p><p>You are right in saying above 0.5Mohm is a "PASS"</p><p></p><p>but if it is a brand new bit of cable you have installed on a new installation.</p><p></p><p>your IR reading should be ALL off your max scale</p><p></p><p>e.g.</p><p></p><p>&gt;199 or &gt;299</p><p></p><p>whatever your meter goes up to.</p><p></p><p>so a reading of 0.7Mohm on a bit of brand new cables imply you have dropped a big brown smelly one somewhere on your installation.</p><p></p><p>older installation will have figures getting lower</p><p></p><p>but in reality most are well above 50 or 60Meg ohm</p><p></p><p>as the Paragraph at the top of page 84 On site guide says ..</p><p></p><p>ANY reading below 2Meg Ohm require further in investigation.</p><p></p><p>HTH.</p><p></p><p>SL</p></blockquote><p></p>
[QUOTE="SPECIAL LOCATION, post: 58126, member: 250"] Hello Kung You are right in saying above 0.5Mohm is a "PASS" but if it is a brand new bit of cable you have installed on a new installation. your IR reading should be ALL off your max scale e.g. >199 or >299 whatever your meter goes up to. so a reading of 0.7Mohm on a bit of brand new cables imply you have dropped a big brown smelly one somewhere on your installation. older installation will have figures getting lower but in reality most are well above 50 or 60Meg ohm as the Paragraph at the top of page 84 On site guide says .. ANY reading below 2Meg Ohm require further in investigation. HTH. SL [/QUOTE]
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