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From: "ED SIKORA" <planeman23@hotmail.com>
To: lancair.list@olsusa.com
Subject: Sizing of breakers/fuses 
Date: Mon, 24 Jan 2000 19:37:03 PST
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Hi all:

Was just sitting around doing initial planning on my LC235 electrical 
system.   I just reviewed the Plans and Archive LML but could find little 
written about the sizing of breakers/fuses for the electrical system.  Can 
anyone fill in the ratings of the breaker/fuse used in the listed components 
to help me plan my panel:

Component:                     fuse/breaker rating:
Fuel Pumps
Nav/Com (Apollo SL)
GPS (handheld)
Flaps                           5 amp breaker (per plans)
Hyd pump                       50 amp breaker (per plans)
Strobes
MT prop (if I can afford)
Instrument Lighting
Interrior Lighting
Gear Down Lites
Aux 14V
Alternator                     80 amp fuse (per LML posts)


I'm sure I've left some off, feel free to help complete this list.
Thanks in advance.

-Ed Sikora
planeman23@hotmail.com


[Ed, et al,

Here's a list off of an Aero-Electric Connection-prepared schematic that
was loaned to me by Simon Creasy (thank you, Simon!) and made for his
Lancair 320:

Main Bus...                  Essential Bus
Alt Field         5A         Ess. Bus Alt. Feed       20A
Lo Volt Warning   5A         Clock                     5A
Landing Lite     10A         Gear  System              5A
Strobes/Navs     15A         Fuel Boost               10A
Flaps            15A         Fuel Xfr                 10A
Starter System    5A         Prop                      5A
Yaw Trim          2A         GPS/Comm                 10A
Roll Trim         2A         Xpndr                     5A
Pitot Heat       20A         T&B                       5A
Spare             5A         Gyro Horizon              5A
                             Standby Alt              10A
                             Remote Compass            5A
                             VM1000 Eng. Instrs.       5A

This particular schematic shows a 70A fuse for the alternator, but that
is obviously to be determined by the size of the alternator being used.
Check the individual power requirements of any other instruments, avionics,
or accessories you might want to add and size their breakers/fuses
accordingly.  I hope this gets you pointed in the right direction.

      <Marv>                   ]

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