battery isolator wire

[dean hanson]

I plan to run a new wire from the isolator to the rear battery on a 75 Avion
coach. Anyone have a suggestion as to the wire size I need to use? Obviously
to charge rear generator/house battery.



Dean C. Hanson 75 Avion

P.O.Box 2096

Fremont, Ca. 94536

(510) 657-9600

 

[Ken H.]

Dean,

Frankly, on that long a run, you can use 'most any size you want. The
resistance of a smaller wire will limit the charge current, but since
you're probably not interested in fast charging. BUT, you'd better include
a low current self-resetting circuit breaker up front just in case the rear
battery is dead and you try to start the Onan. Now, if you want fast
charging, and the ability to start the Onan, you'd better use large
diameter wire, something like #2 or bigger. And in that case, you'd better
put a high current CB in it up front to protect everything from a short
along that long wire. In either case, you'll need a CB similar to the one
up front to protect the rear battery from shorts too. Check the Onan
starter current draw and a wire size/current chart to refine my WAG.

Ain't nuthin' simple!

Ken H.

On Wed, Feb 6, 2019 at 3:33 PM Dean Hanson
wrote:

> I plan to run a new wire from the isolator to the rear battery on a 75
> Avion
> coach. Anyone have a suggestion as to the wire size I need to use?
> Obviously
> to charge rear generator/house battery.
>
>

 

[richshoop]

I would suggest #2 or #1 wire. The wire size is dictated not by the charging current expected, but by the need to boost the front battery when necessary.

>
>
> I plan to run a new wire from the isolator to the rear battery on a 75 Avion
> coach. Anyone have a suggestion as to the wire size I need to use? Obviously
> to charge rear generator/house battery.
>
>
>
> Dean C. Hanson 75 Avion
>
> P.O.Box 2096
>
> Fremont, Ca. 94536
>
> (510) 657-9600
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[tyler]

Inside the 30 amp UPS unit I have been learning about it has several instances of multiple wires attached to single terminals. Is this method of
gaining current capability acceptable in the kind of high amp, low voltage scenario of the front to back battery run?

Example: I found some underground 6/3 copper wire clearanced at Lowes...If I can terminate all three (or even four included ground) together, would
they act like a #1 or #2 AWG electrically?
--
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC

 

[richshoop]

you CAN parallel conductors safely. You do NOT want to use solid conductors in any kind of mobile application. Check out the wire sizing chart at www.waytekwire.com and follow their recommendations. Basically, a pair of 30A wires will indeed provide proper amperaqe capacity to carry 60A, just make sure that both conductors are the same length. If they are not, the shorter one will carry more amperage.

>
>
> Inside the 30 amp UPS unit I have been learning about it has several instances of multiple wires attached to single terminals. Is this method of
> gaining current capability acceptable in the kind of high amp, low voltage scenario of the front to back battery run?
>
> Example: I found some underground 6/3 copper wire clearanced at Lowes...If I can terminate all three (or even four included ground) together, would
> they act like a #1 or #2 AWG electrically?
> --
> 1975 Glenbrook, 1978 Royale rear bath
> Raleigh, NC
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[Ken B]

What size wire did Avion use when they built the coach? Use the same size they used. Why are you changing it in the first place?
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

 

[john phillips]

I have avion A26000 and it has 2 red 600 volt oil restant #10 wires on the
back battery terminal.