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Do-It-Yourself (DIY) Question & Answer Forum
Isolator for Sub Main
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<blockquote data-quote="Riggy" data-source="post: 79360" data-attributes="member: 71"><p>I see it a bit different.</p><p></p><p>I served my time in large factory (2 x 33kV lines in, DNO had substation on site, you get the idea!)</p><p></p><p>So many neutrals had been borrowed over the years the last thing you wanted to do was switch a neutral, chances are you would take the whole "isolated" board upto line voltage!</p><p></p><p>Leave the neutral connected every time in that situation, smaller installtion with discreet zones, then 4 pole every time.</p></blockquote><p></p>
[QUOTE="Riggy, post: 79360, member: 71"] I see it a bit different. I served my time in large factory (2 x 33kV lines in, DNO had substation on site, you get the idea!) So many neutrals had been borrowed over the years the last thing you wanted to do was switch a neutral, chances are you would take the whole "isolated" board upto line voltage! Leave the neutral connected every time in that situation, smaller installtion with discreet zones, then 4 pole every time. [/QUOTE]
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