nuckolls.bob(at)aeroelect
Guest
|
 Posted: Sun Jun 07, 2020 6:49 am Post subject: Physical construction of Z101 engine bus & battery bus |
 |
|
At 07:59 PM 6/6/2020, you wrote:
| Quote: | --> AeroElectric-List message posted by: "user9253" <fransew(at)gmail.com>
Since bob gave permission to others to answer, here are my suggestions: |
you never need my permission . . . this is a moderated
forum for open discussion.
| Quote: | Mount both relays as close as practical to the battery.
Doing that meets the 6" wire length rule of thumb. |
The 6-inch rule is a holdover from waaayyy back when
where the FAA deemed it acceptable to 'burn a piece
of wire that is 6-inches or less in length'. I.e.
no fault protection required.
One can only guess details of reasoning behind this bit
of 1960's wisdom.
Today we can strive to keep potentially vulnerable
(smaller gages) of 'unprotected' wires to a minimum.
Control installation such that probability for
hard faults to ground are exceedingly rare.
Use of fusible link wire where practical (here
there is a 9-inch rule of thumb for MINIMUM
length).
If the wire has to go through a firewall,
provide mechanical protection over and
above normally fused branch wires (two
layers of heat shrink?)
| Quote: | Since you want the engine bus located on the cabin side of the firewall, also
move the diode bridge to aft of the firewall between the main power bus and the engine bus.
Move the diode feed from the main battery contactor to main power bus. Electrically it will be the
same, just connected to the other end of the 6AWG feeder.
Since there are only 2 items connected to the battery bus, consider eliminating the battery bus.
Connect both items to the battery post using inline fuses.
Use all fuses except for the alternator feed 5 amp breaker.
Fuses cost less, weigh less, and never fail to blow when required.
Never replace fuses or reset breakers in flight, except perhaps the alternator field.
|
Sounds like a plan . . .
Bob . . .
| | - The Matronics AeroElectric-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?AeroElectric-List |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
