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Alternator wire length - request

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AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Mon Oct 13, 2008 10:12 am Post subject: Alternator wire length - request

I am installing the main #8 wire from the panel to the alternator. Due to the breaker location on the panel, I think that I might be coming up short running it to the alternator. It is called wire #J1 in the Vans wiring kit.



Question? To run it to the alternator - how much wire (length) do you need in front of the firewall where it emerges from the left side of the firewall to the alternator.



If I do not have enough #8 wire, I will have to buy a new one as I was told on the high voltage wires to NOT solder them together or make any type of break in the wire.

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Q/B - sold.

jesse(at)saintaviation.co
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Posted: Mon Oct 13, 2008 10:46 am Post subject: Alternator wire length - request

I don't know the distance off hand, but you could run it out the right  

side of the FW since the Alternator is on that side.



The alternator is not high voltage, but it is high amperage.  One  

thing I have done in the past is to crimp on a ring terminal forward  

of the firewall and use a separate piece going from there to the  

alternator, then you can bolt the two ring terminals together and put  

a good heavy piece(s) of heat shrink (or other insulator) over the  

joint.  This would allow you to disconnect it if/when you take the  

engine off in the future also, without having to untie everything that  

is holding the alternator wire as it works its way forward to the  

alternator.



do not archive



Jesse Saint

Saint Aviation, Inc.

jesse(at)saintaviation.com

Cell: 352-427-0285

Fax: 815-377-3694



On Oct 13, 2008, at 2:12 PM, AirMike wrote:



 	  Quote: 	
		   



 I am installing the main #8 wire from the panel to the alternator.  

 Due to the breaker location on the panel, I think that I might be  

 coming up short running it to the alternator. It is called wire #J1  

 in the Vans wiring kit.



 Question? To run it to the alternator - how much wire (length) do  

 you need in front of the firewall where it emerges from the left  

 side of the firewall to the alternator.



 If I do not have enough #8 wire, I will have to buy a new one as I  

 was told on the high voltage wires to NOT solder them together or  

 make any type of break in the wire.



 --------

 OSH '08 or Bust (busted) be there in &quot;09

 Q/B Kit - wiring and FWF





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 8539#208539

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dlm46007(at)cox.net
Guest

Posted: Mon Oct 13, 2008 11:13 am Post subject: Alternator wire length - request

Its easrier to run the alternator wire inside from the breaker to the right

side of the firewall as the alternator will be on the right side of the

engine. Also do not understand the high voltage business as the highest

voltage they will see is about 14v DC. Inserta a piece of #8 with butt

connectors 



--

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nukeflyboy

Joined: 05 Jan 2008
Posts: 162
Location: Granbury, TX

Posted: Mon Oct 13, 2008 9:09 pm Post subject: Re: Alternator wire length - request

I would not splice theses wires, it just creates a failure point.  Have you considered just running the alternator output to the battery side of the starter contactor?  You could then run a wire from there to the distribution bus.  I am not familiar with Van's schematic so I don't know if this will work for you.  Nevertheless you can get #8 wire at your Home Depot aircraft parts store.  It does not have to be tefzel for this application.

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Dave Moore
RV-6 built and sold
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AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Mon Oct 13, 2008 9:44 pm Post subject: Alternator wire length - request

I really only need to know the length from the left side FW penetration now.



I only have 60" in front of the Firewall now at the left corner next to the starter relay. I do not want to add a additional firewall penetration. I need to run the alt output separate as it is monitored on the AFS3500 system from a shunt on the sub panel inside the cockpit

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Q/B - sold.

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