<div dir="ltr"><div>Hi Emile,</div><div> </div><div>I have a Durite one which has an isolated return.</div><div> </div><div><a href="http://www.ebay.co.uk/itm/Durite-24V-to-12V-Isolated-Dropper-Voltage-Converter-10-Amp-0-578-60-/221693394113?pt=LH_DefaultDomain_3&hash=item339df4bcc1">http://www.ebay.co.uk/itm/Durite-24V-to-12V-Isolated-Dropper-Voltage-Converter-10-Amp-0-578-60-/221693394113?pt=LH_DefaultDomain_3&hash=item339df4bcc1</a> </div><div> </div><div>Regards</div><div>James</div></div><div class="gmail_extra"><br><div class="gmail_quote">On 28 July 2015 at 21:49, Emile van Essen via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span lang="EN-GB" style="color:navy;font-family:Arial;font-size:10pt">I overlooked the chassis
of the 24 to 12 VDC convertor..<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span lang="EN-GB" style="color:navy;font-family:Arial;font-size:10pt"><u></u> <u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span lang="EN-GB" style="color:navy;font-family:Arial;font-size:10pt">Emile<u></u><u></u></span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span lang="EN-GB" style="color:navy;font-family:Arial;font-size:10pt"><u></u> <u></u></span></font></p>
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<p class="MsoNormal"><b><font face="Tahoma" size="2"><span style="font-family:Tahoma;font-size:10pt;font-weight:bold">Van:</span></font></b><font face="Tahoma" size="2"><span style="font-family:Tahoma;font-size:10pt">
Personal_Submersibles [mailto:<a href="mailto:personal_submersibles-bounces@psubs.org" target="_blank">personal_submersibles-bounces@psubs.org</a>] <b><span style="font-weight:bold">Namens </span></b>James Frankland via
Personal_Submersibles<br>
<b><span style="font-weight:bold">Verzonden:</span></b> maandag 27 juli 2015
12:34<br>
<b><span style="font-weight:bold">Aan:</span></b> Personal Submersibles General
Discussion<br>
<b><span style="font-weight:bold">Onderwerp:</span></b> [PSUBS-MAILIST] Earth
Fault</span></font><u></u><u></u></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">Hi All<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">I have a very peculiar issue. I have an earth fault on the
boat. <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">My test consists of holding one probe of the meter on the positive
battery terminal and the other to the hull somewhere. I was showing a
reading of 24v. So obviously a negative connection somewhere to the hull.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">I went around everything taking things off and have tracked the fault
down to the lights.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">The lights are the trustfire ones and the negative connection is
grounded to the chassis of the light. However, when I fitted the
lights, I was aware of this and so insulated the mounting bracket from the
light casing itself with a piece of rubber. So theoretically, there
is no physical connection from the case to the hull. Only the internal
wire.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">Anyway, if I disconnect the lights and leave them dangling on their
wires, there is no earth fault. The lights all work, and the hull is
clean of current.<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">So the lights must be leaking back through the connection somehow, but
I cant see how. The case is insulated from the mounting bracket with
rubber and the brackets are connected to the fibreglass faring, so it shouldn't
leak back?<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">Anyway, ive fixed it by insulating the mounting bolts with delrin washers,
but I cant see how the earth could return through a piece of rubber and then
glass fibre. A mystery unless anyone can see something obvious?<br>
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Regards<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt">James<u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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<p class="MsoNormal"><font face="Times New Roman" size="3"><span style="font-size:12pt"> <u></u><u></u></span></font></p>
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