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How to arrange the fat wires

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Michael Wynn

Joined: 10 Jan 2006
Posts: 148
Location: San Ramon, CA

Posted: Sun Jun 05, 2011 10:41 am Post subject: How to arrange the fat wires

Hi All,

  

 I have been scratching my head about a wiring layout issue.  I am  wiring an RV 8, rear mounted battery.  I have a #2 wire from the primary  contactor that needs to go to the starter contactor on the far side of the  firewall.  I also need a #8 or so wire to my main bus--in this case a  VP-X.

  

 So here's my question: do I run the #2 uninterrupted to the starter  contactor and then run a wire back through the firewall to the main bus or do I  break the #2 and run the bus wire more directly.  I am reluctant to break  the fat wire before the starter but bringing a relatively fat wire back through  the firewall has its downside as well.

  

 If I am going to break the #2 wire, what is the best physical method of  doing so.  I have seen fiberglass pass-throughs, but I don't think they are  adequate firewall material.  There are insulated posts.  My auto  mechanic friend suggested terminals held together with a bolt and well  insulated.

  

 Thoughts on this?

  

 Regards,

  

 Michael Wynn

 RV 8 Wiring

 San Ramon, CA

  

  

  [quote][b]

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_________________
Michael Wynn
RV 8
San Ramon, CA

rv8iator(at)gmail.com
Guest

Posted: Mon Jun 06, 2011 1:45 pm Post subject: How to arrange the fat wires

Hi Michael,



As a data point...  RV-8 w/ rear mounted battery w/AWG 4 welding cable to the starter contactor and from starter contactor to starter.  I mounted the starter contactor in the baggage compartment, right side near the bottom on the gear leg tower.  This creates a breakout point for the fatwire  to the main bus.  It is also the point for the alternator B-lead connection.  There is a 60 amp ANL fuse adjacent to the starter contactor that protects the alternator B-lead wire.

 



chris

RV-8 #2 

Newberg, OR

BTW...  I am in the BAY from time to time visiting friends in San Ramon (Arenas Ct).  Would like to see your project if you are agreeable.

 



cs



On Sun, Jun 5, 2011 at 11:37 AM,  <MLWynn(at)aol.com (MLWynn(at)aol.com)> wrote:

[quote]      Hi All,

  

 I have been scratching my head about a wiring layout issue.  I am  wiring an RV 8, rear mounted battery.  I have a #2 wire from the primary  contactor that needs to go to the starter contactor on the far side of the  firewall.  I also need a #8 or so wire to my main bus--in this case a  VP-X.

  

 So here's my question: do I run the #2 uninterrupted to the starter  contactor and then run a wire back through the firewall to the main bus or do I  break the #2 and run the bus wire more directly.  I am reluctant to break  the fat wire before the starter but bringing a relatively fat wire back through  the firewall has its downside as well.

  

 If I am going to break the #2 wire, what is the best physical method of  doing so.  I have seen fiberglass pass-throughs, but I don't think they are  adequate firewall material.  There are insulated posts.  My auto  mechanic friend suggested terminals held together with a bolt and well  insulated.

  

 Thoughts on this?

  

 Regards,

  

 Michael Wynn

 RV 8 Wiring

 San Ramon, CA

  

  

   	  Quote: 	
		  



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[b]

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