---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Tue 07/16/13: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:27 AM - Combining alternator wires? (donjohnston) 2. 09:47 AM - Re: Combining alternator wires? (Robert L. Nuckolls, III) 3. 11:20 AM - Re: Combining alternator wires? (donjohnston) 4. 03:13 PM - Re: Re: Combining alternator wires? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 09:27:40 AM PST US Subject: AeroElectric-List: Combining alternator wires? From: "donjohnston" I've looked through the archives because I'm sure this is in there, but I can't find it. I've got a Velocity-XL, 28v system, single battery (up front), dual alternators (60a & 20a). The battery and starter contactors are both up front next to the battery. With respect to the B-leads from the two alternators, does each one need to have a separate wire up to the nose? Or can I install a single wire from the firewall to the front that both alternators can tie in to? If I can do the single wire approach, would all three wires need protection with ANL current limiters, or just the two lines from the alternators? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=404757#404757 ________________________________ Message 2 _____________________________________ Time: 09:47:19 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Combining alternator wires? At 11:26 AM 7/16/2013, you wrote: > >I've looked through the archives because I'm sure this is in there, >but I can't find it. > >I've got a Velocity-XL, 28v system, single battery (up front), dual >alternators (60a & 20a). The battery and starter contactors are both >up front next to the battery. > >With respect to the B-leads from the two alternators, does each one >need to have a separate wire up to the nose? Or can I install a >single wire from the firewall to the front that both alternators can >tie in to? If I can do the single wire approach, would all three >wires need protection with ANL current limiters, or just the two >lines from the alternators? If it were my airplane, the starter contactor would be as close as practical to the starter on the firewall. The starter contactor becomes a fat-wire tie point to bring alternator b-leads to the bus by tying their current limiters to the hot side of the contactor. So yes, the single wire approach works for all three devices . . . a wire which you already have in place. Bob . . . ________________________________ Message 3 _____________________________________ Time: 11:20:31 AM PST US Subject: AeroElectric-List: Re: Combining alternator wires? From: "donjohnston" > The starter contactor becomes a fat-wire tie > point to bring alternator b-leads to the bus > by tying their current limiters to the hot side of > the contactor. Thanks! Follow up question: I can't find a 20a current limiter for the backup alternator. B&C only has them down to 40a. Do I use a regular 20a CB? Or look elsewhere for a 20a current limiter? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=404768#404768 ________________________________ Message 4 _____________________________________ Time: 03:13:48 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Combining alternator wires? At 01:19 PM 7/16/2013, you wrote: > > > > The starter contactor becomes a fat-wire tie > > point to bring alternator b-leads to the bus > > by tying their current limiters to the hot side of > > the contactor. > > >Thanks! > >Follow up question: I can't find a 20a current limiter for the >backup alternator. B&C only has them down to 40a. Do I use a regular >20a CB? Or look elsewhere for a 20a current limiter? Use an ATC inline fuseholder with a 30 A fuse in it. http://tinyurl.com/lusgrmw I have these for sale at: http://tinyurl.com/cgr42l5 you might find them in a local automotive parts house. 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.