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Do-It-Yourself (DIY) Question & Answer Forum
Isolator for Sub Main
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<blockquote data-quote="kme" data-source="post: 79554" data-attributes="member: 113"><p>Ah. Well found. 1 scooby snack to you <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p></p><p>Regarding your last comment. If you isolate the board 4 pole, and a cct with a neutral borrowed from your board is energised; your Neutral bar on your DB will rise to phase potential. Had you only 3 pole disconnected, that wouldn`t happen.</p><p></p><p>Why does it concern you that it`s a sub-main? What is going to happen to that connected Neutral? It can`t rise to any significant potential, as it`s grounded.</p><p></p><p>Even if, by some strange happening, it came disconnected elsewhere, it still won`t cause you any issue. Why do you see a need to isolate it?</p><p></p><p>KME</p></blockquote><p></p>
[QUOTE="kme, post: 79554, member: 113"] Ah. Well found. 1 scooby snack to you :) Regarding your last comment. If you isolate the board 4 pole, and a cct with a neutral borrowed from your board is energised; your Neutral bar on your DB will rise to phase potential. Had you only 3 pole disconnected, that wouldn`t happen. Why does it concern you that it`s a sub-main? What is going to happen to that connected Neutral? It can`t rise to any significant potential, as it`s grounded. Even if, by some strange happening, it came disconnected elsewhere, it still won`t cause you any issue. Why do you see a need to isolate it? KME [/QUOTE]
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Isolator for Sub Main
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