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Busbar Protection Coating

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MHerder

Joined: 11 Feb 2008
Posts: 143
Location: Fort Worth TX

Posted: Fri Jan 08, 2010 6:00 pm Post subject: Busbar Protection Coating

For those of you using bus bars instead of fuse blocks...  What are you using to protect against inadvertent grounding and the sparks that are sure to follow?  I was thinking about coating my bus bars with heat shrink and just cutting away where I wanted to tie in, but I had second thoughts since if it did spark the heat shrink could be a good combustible to get a fire going under my panel.    Any thoughts from anyone are appreciated.



Liquid electrical tape?



Is there some tefzel equivlant that could be used to coat the bus bar?  I know many are not insulated, but it just doesn't give me a warm fuzzy feeling.  



Thanks in advance.

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speedy11(at)aol.com
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Posted: Sat Jan 09, 2010 7:54 am Post subject: Busbar Protection Coating

That's what I did - no issues so far.

 Stan Sutterfield

 Do not archive

  	  Quote: 	
		  I was    thinking about coating my bus bars with heat shrink and just cutting

away    where I wanted to tie in 	


 

  

  [quote][b]

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nuckolls.bob(at)aeroelect
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Posted: Sat Jan 09, 2010 8:14 am Post subject: Busbar Protection Coating

At 08:00 PM 1/8/2010, you wrote:

 	  Quote: 	
		  

<michaelherder(at)beckgroup.com>



For those of you using bus bars instead of fuse blocks...  What are 

you using to protect against inadvertent grounding and the sparks 

that are sure to follow?  I was thinking about coating my bus bars 

with heat shrink and just cutting away where I wanted to tie in, but 

I had second thoughts since if it did spark the heat shrink could be 

a good combustible to get a fire going under my panel.    Any 

thoughts from anyone are appreciated.


	


    This is not done in light aircraft. Seldom done

    in the larger airplanes. I've often hypothesized

    a teachable moment by offering anyone their choice

    of tools to crawl under the panel of a light

    airplane and then pry, bend, pound or twist on

    any part of the airplane in an attempt ground fault

    a bus bar.



    As an example, here's the back side of a breaker

    panel in a Bonanza:



http://aeroelectric.com/Pictures/Breakers/Breaker_Panel_Busing_0.jpg

http://aeroelectric.com/Pictures/Breakers/Breaker_Panel_Busing_1.jpg

http://aeroelectric.com/Pictures/Breakers/Breaker_Panel_Busing_2.jpg



    Bus structures in other light aircraft are similarly

    'exposed'. On the forward side of the firewall we find

    this:



http://aeroelectric.com/Pictures/Wiring_Technique/A36_Firewall_A.jpg

http://aeroelectric.com/Pictures/Wiring_Technique/A36_Firewall_B.jpg



    Lots of potential for arcs and sparks . . . assuming

    that anything under the cowl is so poorly secured

    as to become a risk.



    While cosmetically pleasing, the dressing of bus

    bars doesn't reduce risks but it does distract you

    from what is probably more useful expenditure of

    $time$ on your project.



    Bob . . .

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speedy11(at)aol.com
Guest

Posted: Sun Jan 10, 2010 6:57 pm Post subject: Busbar Protection Coating

It took me literally 1 minute to cut the shrink wrap, position it, and heat  shrink it.  Perhaps very little return on investment, but also very little  expenditure of $time$.

 Stan Sutterfield

 Do not archive

  

  	  Quote: 	
		         While cosmetically pleasing, the dressing of bus

    bars    doesn't reduce risks but it does distract you

    from what is    probably more useful expenditure of

    $time$ on your    project. 	


 

  

  [quote][b]

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