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                           AeroElectric-List Digest Archive
                                      ---
                     Total Messages Posted Fri 05/06/22: 2
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Today's Message Index:
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     1. 02:18 PM - Too many Circuit breakers....  (andymeyer)
     2. 02:48 PM - Re: Too many Circuit breakers....  (Charlie England)
 
 
 
________________________________  Message 1  _____________________________________


Time: 02:18:01 PM PST US
Subject: AeroElectric-List: Too many Circuit breakers....
From: "andymeyer" <meyerkc135@gmail.com>


I'm doing a panel upgrade in my Long EZ and have a lot of breakers - I shouldn't
need this many. I do prefer breakers as I can disable items - especially when
working on one system or another, but there's not a ton of space in a Long EZ
panel. 

Right now, I'm counting 16 breakers - way too many... What can I group, and are
some things better left to a fuse? Garmin and Avidyne say not to group, but there's
quite a few breakers here! 

Accessory (USB charger, etc...)
ADS-B - Stratux
ALTernator (LR3D)
Autopilot (GMC507 + 2 servos)
Audio (GM345)
AV-30E (Backup attitude, plus full time traffic display)
ELT (ACK-E04)
Engine Monitor (Home built)
GAD29C
GDU470
GMU11
IFD540 - COMM
IFD540 - GNS
Ignition 1 (Lightspeed Plasma 3)
Ignition 2 (Lightspeed Plasma 3)
Transponder (AXP-322)


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=506683#506683


________________________________  Message 2  _____________________________________


Time: 02:48:58 PM PST US
From: Charlie England <ceengland7@gmail.com>
Subject: Re: AeroElectric-List: Too many Circuit breakers....

On Fri, May 6, 2022 at 4:21 PM andymeyer <meyerkc135@gmail.com> wrote:

> >
>
> I'm doing a panel upgrade in my Long EZ and have a lot of breakers - I
> shouldn't need this many. I do prefer breakers as I can disable items -
> especially when working on one system or another, but there's not a ton of
> space in a Long EZ panel.
>
> Right now, I'm counting 16 breakers - way too many... What can I group,
> and are some things better left to a fuse? Garmin and Avidyne say not to
> group, but there's quite a few breakers here!
>
> Accessory (USB charger, etc...)
> ADS-B - Stratux
> ALTernator (LR3D)
> Autopilot (GMC507 + 2 servos)
> Audio (GM345)
> AV-30E (Backup attitude, plus full time traffic display)
> ELT (ACK-E04)
> Engine Monitor (Home built)
> GAD29C
> GDU470
> GMU11
> IFD540 - COMM
> IFD540 - GNS
> Ignition 1 (Lightspeed Plasma 3)
> Ignition 2 (Lightspeed Plasma 3)
> Transponder (AXP-322)
>

By 'group', do you mean putting multiple items on one protection device?
The only answer is the additional devices you don't mind losing if
something on the same circuit trips the circuit protection.

My strong preference is a big ATC fuse bus(es) mounted somewhere out of the
way, so I don't have to make that call, and more importantly, I'm never
tempted to play with them in the air. A fuse legend and a little plastic
fuse puller is all that's needed to disable an individual circuit, though I
rarely find the need to do that during maintenance. The only thing on that
list that I'd put on a breaker is the alternator field supply.

FWIW,

Charlie

 

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