---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 11/26/10: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:52 AM - Re: Re: Z13/8 Rev Q comments (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 06:52:39 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Z13/8 Rev Q comments At 11:07 PM 11/25/2010, you wrote: > >> Okay, 20AWG and no fuses it is. > >So assuming all these wires are 6" or less, should I use 20awg and no >fuses on both the diode and the relay path to the Endurance bus ? I WAS speaking of just the normal feed path through the diode . . . and it occurs to me that the "6-inch rule" would be speaking to TOTAL current pathway at risk . . . so strict observance of the rule would call for very short 20AWG conductors totalling 6" or less to wire the diode up between the main and e-bus. But then, that "rule" was never codified in any regulatory document I recall . . . but that doesn't mean it didn't show up on some FAA offices "green sheets". My citation of that practices goes back a long way. I think I first recall discussing it at Cessna when somebody was contemplating the permanent wiring of a fat zener (50W stud mounted) to the main bus as a transient suppressor. This was before the zener market gave birth to the Transorb. Is the sum total of wire from battery bus to e-bus through the relay must surely be longer. Further, it's primary reason for existence is to power a bus from a battery not being charged by an alternator so we'll not want to squander energy in voltage drops. But it seems that the pathway would benefit from the conventional protection methods at BOTH ends since that wire can be SOURCED either from the main bus or the battery bus. Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.