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Student & Learning Zone - City & Guilds
2391 practical
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<blockquote data-quote="voltfree" data-source="post: 168939" data-attributes="member: 12318"><p>Hi to all</p><p></p><p>I am sitting my 2391 practical tomorrow I need some advice please</p><p></p><p>If I am carrying out the live test first (periodic inspection) and I want to do the Ze first is it ok to isolate the isolator on the 3hase db then remove the cover remove the cpc and then carry out the test or do I have to lock off first</p><p></p><p>After completeting the live testing I would lock off to do the dead testing</p><p></p><p>When carrying out the IR on a single phase board supplied from a circuit breaker from the 3hase board should I do the IR test on the single phase board if all is clear on the sigle phase board I would leave this board isolated and carry on with the IR tests on the 3phase board do I switch off any rcd before I do the IR test in case I get any false readings</p><p></p><p>When carrying out the IR testing on the 3 hase board is it to test from the load side of the isolator obviously with the isolator off and the sub circuits on</p><p></p><p>thanks</p><p></p><p>voltfree</p></blockquote><p></p>
[QUOTE="voltfree, post: 168939, member: 12318"] Hi to all I am sitting my 2391 practical tomorrow I need some advice please If I am carrying out the live test first (periodic inspection) and I want to do the Ze first is it ok to isolate the isolator on the 3hase db then remove the cover remove the cpc and then carry out the test or do I have to lock off first After completeting the live testing I would lock off to do the dead testing When carrying out the IR on a single phase board supplied from a circuit breaker from the 3hase board should I do the IR test on the single phase board if all is clear on the sigle phase board I would leave this board isolated and carry on with the IR tests on the 3phase board do I switch off any rcd before I do the IR test in case I get any false readings When carrying out the IR testing on the 3 hase board is it to test from the load side of the isolator obviously with the isolator off and the sub circuits on thanks voltfree [/QUOTE]
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