<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div><span>Pete,</span></div><div dir="ltr"><span>in addition to what Sean said, the penetrators are to be water tight</span></div><div id="yui_3_16_0_ym19_1_1495274813385_2606" dir="ltr"><span>even if the cable is shorn off!</span></div><div id="yui_3_16_0_ym19_1_1495274813385_2574" dir="ltr"><span id="yui_3_16_0_ym19_1_1495274813385_2607">ABS submersible rules refers you to the Steel Vessel Rules, & a sizing chart (table 6) in</span></div><div id="yui_3_16_0_ym19_1_1495274813385_2608" dir="ltr"><span id="yui_3_16_0_ym19_1_1495274813385_2609">part 4 chapter 8 & section 3.</span></div><div id="yui_3_16_0_ym19_1_1495274813385_2616" dir="ltr"><span>Alan</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1495274813385_2519"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1495274813385_2524" style="display: block;"> <div id="yui_3_16_0_ym19_1_1495274813385_2523" style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1495274813385_2522" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1495274813385_2521" dir="ltr"> <font id="yui_3_16_0_ym19_1_1495274813385_2520" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Pete Niedermayr via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Friday, May 19, 2017 5:33 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Penetrator materials<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1495274813385_2576"><br><div id="yui_3_16_0_ym19_1_1495274813385_2575" dir="ltr">Are there any standards regarding electrical penetrators (battery pod to pressure hull) ie electrode diameter,insulator thickness ? <br></div><div id="yui_3_16_0_ym19_1_1495274813385_2577" dir="ltr">--------------------------------------------<br></div><div id="yui_3_16_0_ym19_1_1495274813385_2579" dir="ltr">On Wed, 5/17/17, Alan via Personal_Submersibles <<a id="yui_3_16_0_ym19_1_1495274813385_2578" href="mailto:personal_submersibles@psubs.org" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><div id="yui_3_16_0_ym19_1_1495274813385_2580" dir="ltr"><br></div><div id="yui_3_16_0_ym19_1_1495274813385_2581" dir="ltr"> Subject: Re: [PSUBS-MAILIST] Penetrator materials<br></div><div dir="ltr"> To: "Personal Submersibles General Discussion" <<a href="mailto:personal_submersibles@psubs.org" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br></div><div id="yui_3_16_0_ym19_1_1495274813385_2623" dir="ltr"> Date: Wednesday, May 17, 2017, 7:08 PM<br></div><div id="yui_3_16_0_ym19_1_1495274813385_2624" dir="ltr"> <br></div><div dir="ltr"> Thanks<br></div><div dir="ltr"> Sean,I filed<br></div><div id="yui_3_16_0_ym19_1_1495274813385_2625" dir="ltr"> a conical penetrator design, but had forgotten about<br></div><div dir="ltr"> it!Alan<br></div><div dir="ltr"> <br></div><div id="yui_3_16_0_ym19_1_1495274813385_2626" dir="ltr"> Sent from my iPad<br></div><div dir="ltr"> On<br></div><div dir="ltr"> 18/05/2017, at 9:28 AM, Sean T. Stevenson via<br></div><div dir="ltr"> Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br></div><div dir="ltr"> wrote:<br></div><div dir="ltr"> <br></div><div dir="ltr"> If you machine the<br></div><div dir="ltr"> hole through the penetrator as a conical cavity rather than<br></div><div dir="ltr"> cylindrical, and then use a potting epoxy with some<br></div><div dir="ltr"> compliance / flexibility, the pressure acting to push the<br></div><div dir="ltr"> potting compound into the hole will also develop some<br></div><div dir="ltr"> increased compressive force around the electrodes.<br></div><div dir="ltr"> Sean<br></div><div dir="ltr"> <br></div><div dir="ltr"> <br></div><div dir="ltr"> <br></div><div dir="ltr"> <br></div><div dir="ltr"> On May 17, 2017 1:55:51 PM<br></div><div dir="ltr"> MDT, Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br></div><div dir="ltr"> wrote:<br></div><div dir="ltr"> Hank,If<br></div><div dir="ltr"> I cover everything with the glue & then the<br></div><div dir="ltr"> polyurethane, I won't need to rely onthe epoxy for sealing.<br></div><div dir="ltr"> If the cable was cut then the system would rely on the<br></div><div dir="ltr"> epoxyas a<br></div><div dir="ltr"> back up. At that stage I could put up with a temporary<br></div><div dir="ltr"> dribble; the electrics wouldbe shorting out as<br></div><div dir="ltr"> well. I will be wary of stripping back enough of the wiring<br></div><div dir="ltr"> sheath,but<br></div><div dir="ltr"> failure can also occur between the epoxy & wall of the<br></div><div dir="ltr"> penetrator.Cheers Alan<br></div><div dir="ltr"> <br></div><div dir="ltr"> Sent<br></div><div dir="ltr"> from my iPad<br></div><div dir="ltr"> On 18/05/2017, at<br></div><div dir="ltr"> 12:02 AM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br></div><div dir="ltr"> wrote:<br></div><div dir="ltr"> <br></div><div dir="ltr"> Alan,That<br></div><div dir="ltr"> is not correct, the epoxy will not stop the water past 1,000<br></div><div dir="ltr"> psi completely. If the wires are stripped back<br></div><div dir="ltr"> further so the sealant creates an extra layer against<br></div><div dir="ltr"> t_______________________________________________<br></div><div dir="ltr"> Personal_Submersibles mailing<br></div><div dir="ltr"> list<br></div><div dir="ltr"> <a href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br></div><div dir="ltr"> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br></div><div dir="ltr"> _______________________________________________<br></div><div dir="ltr"> Personal_Submersibles mailing list<br></div><div dir="ltr"> <a href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br></div><div dir="ltr"> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br></div><div dir="ltr"> <br></div><div dir="ltr"><br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">Personal_Submersibles mailing list<br></div><div dir="ltr"><a href="mailto:Personal_Submersibles@psubs.org" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br></div><div dir="ltr"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br></div><br><br></div> </div> </div> </div></div></body></html>