---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 07/02/26: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:02 AM - Breakers or fuses, the perennial question (Peter Pengilly) 2. 08:27 AM - Re: Breakers or fuses, the perennial question (user9253) ________________________________ Message 1 _____________________________________ Time: 02:02:15 AM PST US From: Peter Pengilly Subject: AeroElectric-List: Breakers or fuses, the perennial question Bob, Its good to hear from you again! I have been pondering the breakers or fuses question in my last couple of p anel builds. I had several breakers already installed so didn't object to k eeping them. The last panel had a load of Garmin stuff. In particular a GDU 460 screen. This screen needs some button pushing at power up to get it in to "Configuration" mode, which is used $a lot$ during the early panel set-u p stages and also occasionally thereafter. A breaker is more useful on this power supply to be able to get the unit into config mode easily. Some of the other devices also did not need to be (and I did not want them to be) powered up during maintenance activities and do not have an off swit ch. Therefore, a breaker seemed more suitable for these devices. There are also things like a stall warner that I hate (AoA is much better) but I must have due to local regulations, so that is on a breaker. I have taken the view that I want to use as many fuses as possible and deci ded that, * Everything gets a fuse unless there is a good reason otherwise * Anything with an off switch on the unit or in the panel (eg lights) definit ely gets a fuse * Anything that I really don't want powered up during maintenance on other sy stems gets a breaker * Anything that needs powered applied in a controlled manner (eg GDU 460) get s a breaker * Anything that I don't want on very often gets a breaker I didn't apply these rules strictly enough during the last build and ended up with too many breakers that were expensive and a pain to install. I also used some ETA non pullable breakers (for items with off switches) that wer e small and inexpensive, but more expensive than fuses. I have found it dif ficult to avoid installing several breakers. Peter ________________________________ Message 2 _____________________________________ Time: 08:27:52 AM PST US Subject: AeroElectric-List: Re: Breakers or fuses, the perennial question From: "user9253" I suggest that you use fuses for everything. Then use miniature toggle switches for those items that you want to shut off. https://www.mouser.com/datasheet/3/339/1/MN_ToggleSections_DP.pdf In my plane, I mounted all switches on a rectangular piece of aluminum with a nutplate at each end. Then mounted that aluminum behind the instrument panel with two screws. If necessary to service a switch, remove the two screws and all switches are removed at once. Of course the wires are longer to form a service loop. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=517212#517212 Attachments: http://forums.matronics.com//files/switches_147.jpg ------------------------------------------------------------------------------------- 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.