<div dir="ltr">ABS says you should protect both positive and negative. <div><br></div><div>"Circuits are to be protected from overloads and short circuits by protective devices which open all conductors. These protective devices are to be circuit breakers, except fuses may be used for immersion heaters and where overcurrent devices are inaccessible during normal operations. Essential and emergency circuits are to be provided with short circuit relays that can be reset."</div><div><br></div><div>I find it useful to have these resettable dual-pole breakers right in front of me, because they're an easy way of ensuring there is no power to the thrusters when anyone is swimming near the sub. The actual throttle controls are quite easy to trigger accidentally.<br><div><br></div><div>Best,</div><div>Alec</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, May 21, 2024 at 7:15 AM Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:"times new roman","new york",times,serif;font-size:16px"><div dir="ltr">Hey gang, I'm curious what the general consensus is regarding fuse/breaker protection on both pos/neg legs of the propulsion motor or if protection on just the positive side is enough.</div><div dir="ltr"><br></div><div dir="ltr">Jon</div></div></div>_______________________________________________<br>
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