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<blockquote data-quote="Sidewinder" data-source="post: 255052" data-attributes="member: 9512"><p>App,</p><p></p><p>I don't think there is anyone else's N current flowing as the building has its own 11kV transformer outside IIRC.</p><p></p><p>However, that "may" feed other premises, but they will all be similar in nature.</p><p></p><p>There will be good earth bonding due to the structure.</p><p></p><p>I would think about harmonics.</p><p></p><p>KME,</p><p></p><p>Which meter did you use?</p><p></p><p>What was the N current? (Measured or Calculated?)</p><p></p><p>I'm guessing you measured the earth current in the NE link at the read of the DNO section of the panel board?</p><p></p><p>Same as we did in the other big job we looked at?</p><p></p><p><span style="font-size: 8px"><span style="color: Silver">---------- Post Auto-Merged at 06:53 ---------- Previous post was made at 06:50 ----------</span></span></p><p></p><p>When you do your part sectional shut down can you nip in and measure any currents?</p><p></p><p>This would at least eliminate the area where you are changing the dis board, which could be a good shout for leakage?</p><p></p><p>BTW,</p><p></p><p>Roughly what was the phase current when you did your measurements?</p></blockquote><p></p>
[QUOTE="Sidewinder, post: 255052, member: 9512"] App, I don't think there is anyone else's N current flowing as the building has its own 11kV transformer outside IIRC. However, that "may" feed other premises, but they will all be similar in nature. There will be good earth bonding due to the structure. I would think about harmonics. KME, Which meter did you use? What was the N current? (Measured or Calculated?) I'm guessing you measured the earth current in the NE link at the read of the DNO section of the panel board? Same as we did in the other big job we looked at? [SIZE=8px][COLOR=Silver]---------- Post Auto-Merged at 06:53 ---------- Previous post was made at 06:50 ----------[/COLOR][/SIZE] When you do your part sectional shut down can you nip in and measure any currents? This would at least eliminate the area where you are changing the dis board, which could be a good shout for leakage? BTW, Roughly what was the phase current when you did your measurements? [/QUOTE]
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