October 1, 2007 - Wiring

 I want to minimize the number of wire pass-through holes I drill in the firewall.  I plan on having only two:  one near the battery and relays for electrical system stuff, and one on the left side for the engine sensor wires. 

I agonized on where to drill the battery-side hole.  I finally decided to put it up high so it would be near the Battery bus.  I'm going to put in a stainless-steel, fire sleeve pass-through thingamajig, but for the time being I just have a plastic snap-bushing in. 

 
Now that I'm starting to run a few wires, I need to support and group them somehow.  I decided on holes through the ribs. 
 
 I'm liberally using tie-wraps -- ala Dan Checkoway -- to keep the wires bundled together. 
 
My first wire out of the LP-3. 
 
 I'm trying to keep slack in the wires near the panel, so that I'll be able to pull the panel out a short distance without having to disconnect things. 
 
 This is the famous AeroConnection Z-11 diagram that I'm basing my electrical system upon.  As I run a wire, I highlight it in yellow.  I've looked at this diagram so much, I could probably draw it from memory! 
 

 I find that having a diagram to refer to is essential.  The Z-11 diagram doesn't have much detail as far as the devices coming off the Buses, so I drew my own.  Very simple but I like having it. 

Basically it is either:

1)  Bus - Device - Ground     (if device has its own on-off switch)

2)  Bus - Switch - Device - Ground 

 
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