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  #1  
Old 06-05-2022, 12:12 PM
Steve Crewdog's Avatar
Steve Crewdog Steve Crewdog is offline
 
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Default Color coding wires: when to stop?

I'm redoing some wiring and where it's possible I'm taking the opportunity to change from white to colored wire (red/black, blue for audio, yellow for signal, etc). Some things are simple, I'm adding red or black heat shrink to the battery wires, but after that, the question is, where do you stop?

For instance, I've got 4 switches on my left panel, 3 of which have circuit breakers. So I have wires going from the power buss into CBs, from the CBs to the switch, then from the switch to the device (generator, alternator, main fuel pump), if I changed them from white -> red, instead of a mass of white wires I'd have a mass of red wires. Plus wires going from the starter switch underneath to a terminal strip, which then distributes to various other functions.

If I understand it right, until the power is used a wire is technically "hot", and should/could be coded red, then on the return from the device it would be black for ground.


Not sure if changing everything in this area from white to red is an improvement or not, or is there a point you would draw the line, like only red wires into the CBs, then white from there.


Thoughts?
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  #2  
Old 06-05-2022, 12:23 PM
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Builders preference for this. I made all power wires red, all ground wires black, all data/signal wires white. Further more specific identification indicating where the wire originates and where it terminates was made using labels at each end.
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  #3  
Old 06-05-2022, 12:33 PM
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Quote:
Originally Posted by erich weaver View Post
Builders preference for this. I made all power wires red, all ground wires black, all data/signal wires white. Further more specific identification indicating where the wire originates and where it terminates was made using labels at each end.
Similar on our plane, signal and data wire was pretty much as supplied from GRT----all nicely color coded. GRT supplies color coded wire for all connections and we did not need all in our installation, so I re-purposed some of the unused wiring and made note of these in our "as built" book.
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  #4  
Old 06-05-2022, 12:38 PM
Mikeyb Mikeyb is offline
 
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To me, after 40 years of wiring similar hardware, wire color codes have their place in some repetitive applications but when you are terminating both ends and have labeled them as you have itís not a big advantage. Nothing looks nicer than an all white wire bundle.
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  #5  
Old 06-05-2022, 12:48 PM
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Iíd get rid of the riveted switches
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  #6  
Old 06-05-2022, 01:41 PM
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Quote:
Originally Posted by Walt View Post
I’d get rid of the riveted switches
Do you mean the SPST switches with screw on terminals? https://www.steinair.com/product/tog...rew-terminals/ I prefer screw on terminals over the Fast-on (Never-off) blade connection.
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Last edited by Steve Crewdog : 06-05-2022 at 01:44 PM.
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  #7  
Old 06-05-2022, 01:52 PM
David Paule David Paule is offline
 
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I did what Erich did.

By labeling each device's wires, and referring to the wiring diagram, it's easy to tell what's what, even if multiple devices are bundled together.

Dave
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  #8  
Old 06-05-2022, 02:46 PM
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Quote:
Originally Posted by Steve Crewdog View Post
Do you mean the SPST switches with screw on terminals? https://www.steinair.com/product/tog...rew-terminals/ I prefer screw on terminals over the Fast-on (Never-off) blade connection.
Yep, cheap Carling switches only recommended for those on a SERIOUS budget.

https://www.steinair.com/product-cat...rby=price-desc
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Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
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Last edited by Walt : 06-05-2022 at 02:54 PM.
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  #9  
Old 06-05-2022, 02:54 PM
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Quote:
Originally Posted by Walt View Post
Yep, cheap Carling switches only recommended for those on a SERIOUS budget.
https://www.digikey.com/en/product-h...oggle-switches
Ah, ok.

I figure SteinAir would not sell something that was not good enough for flight.


[thread drift]
Stein also sells SPST Honeywell switches @ $22 each. https://www.steinair.com/product-cat...iguration=spst

Thoughts about Honeywell switches @$22 each vs Carlings @ $5.50 each, all?
[/thread drift]
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Last edited by Steve Crewdog : 06-05-2022 at 03:06 PM.
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  #10  
Old 06-05-2022, 03:31 PM
Mikeyb Mikeyb is offline
 
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Iím betting this turns into one of those popcorn threads but.. just buy one of the more expensive switches and compare the switch action and finish. I did and threw away the Carling.
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