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Student & Learning Zone - City & Guilds
Fault Finding - Any Tips?
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<blockquote data-quote="mojorebel" data-source="post: 74571" data-attributes="member: 5566"><p>What I teach my students to do is to follow the OSG sequence of tests (apart from polarity that can be done during confirmation of CPC continuity, when using test method 1 (TM1) ) This way all the faults (apart from functional and O/C neutral, will come to you- If you jump in looking for faults you can get a bit frustrated, better to work through the test sequence and let the faults find you. I do teach a little trick to aid fault diagonsitics on Ring Final testing (use TM1 and r1 + r2 value and compare results to R1 + R2 on third step of ring continuity test (i.e r1+r2/4), this is a good indicator of possible duplicate and parallel earth faults on an all insulated wiring system).</p><p></p><p>quick tip on the AM2 there is usally a fault on the motor inch-device.</p></blockquote><p></p>
[QUOTE="mojorebel, post: 74571, member: 5566"] What I teach my students to do is to follow the OSG sequence of tests (apart from polarity that can be done during confirmation of CPC continuity, when using test method 1 (TM1) ) This way all the faults (apart from functional and O/C neutral, will come to you- If you jump in looking for faults you can get a bit frustrated, better to work through the test sequence and let the faults find you. I do teach a little trick to aid fault diagonsitics on Ring Final testing (use TM1 and r1 + r2 value and compare results to R1 + R2 on third step of ring continuity test (i.e r1+r2/4), this is a good indicator of possible duplicate and parallel earth faults on an all insulated wiring system). quick tip on the AM2 there is usally a fault on the motor inch-device. [/QUOTE]
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Fault Finding - Any Tips?
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